Anyone attended DQOS course? [7:35239]
Has anyone attended the new DQOS course? This is the QoS course recommended for the new IP Telephony Specialist. The other courses are CVOICE & CIPT. What is it like, is it basically the IP QoS book plus QoS for VoIP? Is it running in the UK yet? Thanks Peter -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=35239&t=35239 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: VOIP for CCIE [7:34849]
Woody, Why not take a look at the MC3810 if you put 64 Mb RAM into them, then they will do VoIP. There are quite a number on ebay from time to time. You can think of them as very similar to a 2610 + 2 x wic-1T in basic functionality. Similar cpu power to a 2610, 10 BaseT + 2 x serial ports built in. Many come with the optional AVM6 voice module fitted. (An AVM6 takes up to 6 x APMs, Analogue Personality modules - fxs, fxo, & e&m versions available) some have DVM - E1/T1 primary rate digital voice modules fitted and many have mft E1/T1 (multiflex-trunk modules) fitted. On the whole they seem to go for rather less than a 2610 + NM-1V + vic- 2fxs + 2 x Wic-1T. If you get MC3810 + AVM6 + 2 x APM-fxs + mft-E1/T1 and have 64 Mb Ram then they will do: VoFR, VoIP, VoATM and you can use a pair of them with mft back to back to practice ATM pvcs at 2 Mb and all for less than a pair of 2610s with voice! They are used on the CVOICE course and are suggested as a cost effective alternative in Solie's CCIE Practical Studies Vol1 though they are not the actual routers on the lab syllabus. But, if this makes a significant difference to you then you are probably not yet ready to sit the lab. Peter In article , Steven A. Ridder writes >try a 1750 or 1751. >""Woods, Randall, SOBUS"" wrote in message >[EMAIL PROTECTED]">news:[EMAIL PROTECTED]... >> Hi all, >> I was wondering if anyone could give me some recommendations of what >> equipment would be best suited for adding VOIP to my home lab. I am >> considering getting the 2600 series but wanted some advise on if there was >> anything smaller or better suited for the job. Thanks for the help. >> >> Woody >html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=34921&t=34849 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CISCO MC3810 [7:32007]
Cargello, Yes! The MC3810 does support VoIP. However, you require a special feature set load that includes VoIP it is recognised by 'v5' in the feature code. eg IP Plus with voip mc3810-isv5-mz_121xxx, enterprise plus with ATM and VoIP support mc3810-a2jsv5-mz_121xxx. In order to run the VoIP enabled feature sets you require 64 Mb RAM, which may necessitate a bootrom upgrade (require 12.06rt4 bootrom code), otherwise your 64 Mb module will be seen as 16 Mb! You will also require a voice i/f module: AVM6 + APM personality modules for analogue (E&M or fxo to pabx / co switch); BVM for Basic rate ISDN; or DVM for primary rate (either T1 or E1). Peter In article , Christian Arguello writes >Hi > >Does any body lnow if CISCO mc3810 support voip using h323 protocol, if so, >with wich IOS does Cisco mc3810 works with VoIP. what do i have to do to make >tha a CISCO mc3810 works as a gateway in VoIP, i mean that my CISCO must be a >bridge between PSTN and the IP Cloud. > >Regards >html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=32061&t=32007 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: ISDN Issue [7:29337]
John, Two points: in the past some Telcos required you to dial a different international dial code if you wanted to ensure that the path was 64Kb data capable end to end. Some international circuits go over compressed circuits, normally over satellite and some heavily used long distance submarine cables. However, I thought that most of the high-tech world had moved over to sense on bearer capability. If the call comes in as 64 k unrestricted data then the exchanges should provide you with a full 64 data capable path. The second point is if you are high level bearer capability V.120 then the originating end has most likely got a TA and is trying to do v.120 rate adaption your answering end needs to be configured to support it. If it is not configured to support v.120 rate adaption then it will reject the call, probably with a normal clearing code of 16. Peter .In article , John Kale writes >Hi all, > >i have a router setup to receive isdn calls from windows clients using TA's. >All the UK clients can connect but the france clients can't. with the debug >isdn q931...i can see RX i also see the v120 and low layer compati message. CCO says for me to get >the v120 message means my router can detect v120 encap. i need tips on what >could be wrong and how i can solve the problem. > > >also sometimes the UK clients dial, connect, get issued an ip address from >my dhcp server(my router) but a windows error message then comes up 'error >xxx: cannot open port' .it takes a reboot of my router to resolve this >issue. > >thank you for ur anticipated response(s). > > >regards, > >John > > >_ >Join the worlds largest e-mail service with MSN Hotmail. >http://www.hotmail.com >html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=29801&t=29337 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CCIE Lab Book Review [7:28991]
I have used: A) 'All-in-One' first edition and a look at the 2nd edition of it. B) 'CCIE Lab Practice kit' ISBN 0-07-212766-X also by Hutnik C) 'IPeXpert Lab workbook' A) All-in-one seems to be the standard starting book and covers the technologies. The labs are trivial and illustrate individual points requiring approx. 3 - 4 routers but is a good starting point. Get 2nd edition as it is improved and has additions on VoIP, DLSW, QoS, & MPLS. B) 'Lab Practice Kit' 1) As has been pointed out there are a number of mistakes, some silly ones which begs the question was it proof read properly. However, if you are any way close to taking the lab then these should be trivial for you to spot. 2) The 6 scenarios are a good half way house between the 'labettes' in All-in-One covering a single point and the full lab simulations in IPeXpert. The scenarios are done on a topic by topic basis and as such are quite good but be aware that you should be thinking of putting aspects of all 6 topics into a single lab to get to the level of interaction and complexity needed in preparation for the real lab. 3) Unlike IPeXpert which is based on a single physical topology, each lab is different so when you want to try another lab you have to shuffle the interface modules around and swap cables over. Personally I prefer to build a single physical topology and work with it for a good while, particularly now that the cabling aspects are no longer part of the lab exam. 4) You need 7 or 8 routers to complete the labs plus ISDN switch plus CAT. It is helpful if one of the routers is a terminal server. 5) The book is $60 compared with $450 for IPeXpert and $650 for CCBOOTCAMP. You get what you pay for. In my opinion worth the $60 but not to be compared with the full lab work books. C) IPeXpert workbook. I have the original version 1.0A to which Wayne has sent me the 1.1 and version 2.0 updates. There are some mistakes particularly in v1.0 but Wayne seems to correct them as they are discovered. This is divided into 2 sections: the first covers the technologies, the second contains 5 full lab simulations. (There is a sixth 1 day lab included in the version 2.0 material). As I have already said there is a single physical topology so you can quickly change from one lab scenario to the next. 1) This is not light on equipment! It has fairly extensive coverage including VoIP, DLSW, & ATM. There are 9 routers to configure in the lab (one of which is the Frame Relay switch R3 and two of which are dual LAN Token Ring / Ethernet) and you also require 3 additional backbone routers, a terminal server, a CAT and a Basic Rate ISDN switch/simulator. If you are careful in your choice of routers you can reduce this by doubling up the function of R3 with one of the backbone routers and the terminal server with the function of another backbone router. But that is still 11 routers! 2) The breadth and depth of coverage of topics seems to be adequate. The simulated labs seem to have slightly more fiddly bits and gotchas than the real thing. 3) The main pain IMHO is that all the 'Show' outputs and example solutions are only on the CD so although the workbook itself is quite compact you end up with a couple of reams of paper to print off from the CD. 4) The diagrams are in colour which helps. 5) Watch out solutions are all given using 12.0 features! Some of which also have other solutions that could be run on 11.2 or even 11.3. This also feeds into point 1 - the equipment requirements are not light! You may need to upgrade the Flash & DRAM on all 11 routers to run 12.0 Enterprise Plus IOS! 6) The 1 day lab is divided into 5 parts: the morning, the afternoon, moderators comments (I found this helpful to review what was wanted), the 'show' o/p, and the example solution. 7) IPeXpert workbook labs are no where near as well represented on GroupStudy as are the CCBootcamp ones. 8) The IPeXpert labs are reputed to be more up to date than the CCBootcamp ones though not having seen the later I am not in a position to comment either way. 9) Wayne is fairly responsive by email to comments and questions. On the whole I am enjoying working through the scenarios in all 3 resources and feel that they complement each other rather than compete. Peter In article , Elijah Savage writes >Does anyone have any comments on this book not many reviews on Amazon. A >guy at work said this thing was so full of mistakes that he got so angry >and took it out to the gun range and filled it full of 44magnum holes >and has it displayed on his desk now, I just can't take his word for it >and the few reviews on Amazon were good reviews. > >Cisco CCIE >All In One Lab Lab Study Guide >ISBN 0-07-212760-0 >By Stephen Hutnik & Micheal Satterlee >html >Report misconduct and Nondisclosure violatio
Re: ATM circuit [7:28774]
Priscilla, It depends! There is a new facility known as AToM (Any Transport over MPLS Tunnel) that supports ATM over an MPLS core. (If you implement the MPLS core over Gigabit Ethernet then yes you can carry ATM over Gigabit Ethernet.) It is used by some new generation service providers to offer ATM, Frame Relay, and leased line services to their customers when in fact they really only have an IP based network. Some details of it are covered in ATM Forum AF-AIC-0178.000 August 2001. (you can down load it from ATM Forum web site) I also recollect seeing it on some Cisco Carrier MPLS slides. I'll try to dig out the reference. Try a CCO search on ATOM / looking at the MPLS & ATM pages. There is a mention of it in: "Service Provider QoS, Providing e2e Guarantees by Vijay Krishnamoorthy (Cisco IOS Technologies Div April 2001)" I'll try to find a URL for the article. Peter In article , Priscilla Oppenheimer writes >My co-author added this statement to the book I'm working on: > >" an ATM virtual circuit may begin on an OC-3 fiber link, cross over to >a T3 line, pass across a Gigabit Ethernet fiber backbone, and end up going >out through an OC-12 fiber link. This may be an implementation of a single >ATM circuit, however." > >Could an ATM virtual circuit really span an Ethernet backbone?? > >Thanks! I don't want to be one of those authors that propagates >misinformation. ;-) Seriously, some mistakes are unavoidable, but this one >seems avoidable (if it is a mistake) > >Priscilla > > > >Priscilla Oppenheimer >http://www.priscilla.com >html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=28997&t=28774 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: VoIP MC-3810 [7:27874]
Hugo, I am not sure of 12.2 T images. Certainly in 12.1 and below voip support was a variant on the standard feature sets. So 'is-mz' was IP plus, 'a2isv5-mz' was IP plus with VoATM & VoIP support. This was also the case for main stream 12.2(3) 'mc3810-a2jk8sv5-mz_122-3.bin' When you come to down load from cco it has the variants. Take a look at the 12.1 to see what I mean then look at 12.2 and check the release notes. Peter In article , [EMAIL PROTECTED] writes >Peter, > >Looking at the feature navigator, we can see that the image >mc3810-is-mz.12.2-4.T1 supports VoIP. > > > >May be the "v5" variant is not needed. > >Thanks, > >Hugo > >-Original Message- >From: Peter Whittle [mailto:[EMAIL PROTECTED]] >Sent: sabado, 1 de dezembro de 2001 07:45 >To: [EMAIL PROTECTED] >Subject: Re: VoIP MC-3810 [7:27874] > > >Hugo, > >Your sh ver looks promising. The definitive way is to look at the >BOTTOM >and see if they are p.n.: 17-4840 rev 03 or later. > >I believe that they contain System Bootstrap Version 12.0(6r)T4. > >By the way the 12.0(6r)T4 is the WBOOT code that you need to support >32 >Mb Flash. > >You will need atleast 16 Mb Flash if you want to run current >enterprise >feature set. If you can get by with ip plus then you can get by with >your existing 8 Mb. Remember, if money is tight and you have upgraded >the DRAM to 64 Mb you could always boot the IOS from a TFTP server >instead of from flash, just watch out when you do a 'wr erase' to >clear >out the configs as it will no longer know its ip address and you will >end up running the flash IOS. > > >Peter > > > >In article , [EMAIL PROTECTED] > writes >>Peter, >> >>Thank you for replying. Great info that the IOS image should contain >>"v5" feature set. ;-)) >> >>The box is an MC-3810 (not V or V3) with 32MB DRAM and 8MB flash with >>mc3810-is-mz.120-5.XK image. >> >>ROM: System Bootstrap, Version 12.0(6r)T4, RELEASE SOFTWARE (fc1) >>ROM: MC3810 Software (MC3810-WBOOT-M), Version 12.0(6r)T4, RELEASE >>SOFTWARE (fc1) >> >>As fas I understood reading the notes at: >> >>this box will recognize a 64MB DRAM. >> >>Am I correct? >> >>TIA >> >> >>-Original Message- >>From: Peter Whittle [mailto:[EMAIL PROTECTED]] >>Sent: sexta-feira, 30 de novembro de 2001 21:40 >>To: [EMAIL PROTECTED] >>Subject: Re: VoIP MC-3810 [7:27874] >> >> >>The MC-3810 supports VoIP if you have a v5 variant of the IOS. >> >>eg enterprise + voatm + voip would be mc3810-a2jsv5_122-3.bin >> >>Of course you need a voice module, AVM (analogue), BVM (ISDN Bri), >>DVM (ISDN Pri, CAS) and any load will do vofr. >> >> >>However, VoIP loads require 64 Mbytes DRAM. >> >>If you upgrade an old mc-3810 or mc-3810v you need recent BOOTROMs, >>take >>a look in the release notes for details. If your bootroms are not >>recent >>enough then a 64Mb SIMM will only show up as 16 Mb! The bootroms are >a >>free of charge item. You will have to pay postage and may need to >>order >>them via a partner if you don't have SMARTNET on the routers. >> >>Peter >> >> >> In article , [EMAIL PROTECTED] >> writes >>>Just to confirm. Can a MC-3810 do VoIP or only VoFR? >>> >>>Thanks, >>> >>>Hugo >>>html >>>Report misconduct and Nondisclosure violations to >>[EMAIL PROTECTED] >>> >> > -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=28103&t=27874 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: IS-IS BSCN [7:27955]
Steve, When I last looked IS-IS was not specifically in the syllabus for BSCN. However, it is in scope for the new BSCI which you can also offer instead of the routing exam. It is actually the routing module for CCIP. This suggests that even if it is not on the current syllabus it is likely to come on in the future. In any case it is probably useful at least to have had a look at it. Peter In article , Stephen Neville writes >Hi group > >Iam currently studying for the BSCN, i am using the sybex study guide. My >question is i have gone through the book and cant see any sections on IS-IS, >yet the books practice exams has questions reguarding IS-IS. I have looked >on the cisco web site but cant see anything about IS-IS being in the BSCN >exam. > >Can any one clear this up is IS-IS a topic in the BSCN exam. > >Thanks in advance > >- Steve >html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=28104&t=27955 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: VoIP MC-3810 [7:27874]
Hugo, If you are after some e.g. configs take a look at my earlier post in the GroupStudy ccielab archives. Posting 200111/msg01481. Peter article , [EMAIL PROTECTED] writes >Peter, > >Thank you for replying. Great info that the IOS image should contain >"v5" feature set. ;-)) > >The box is an MC-3810 (not V or V3) with 32MB DRAM and 8MB flash with >mc3810-is-mz.120-5.XK image. > >ROM: System Bootstrap, Version 12.0(6r)T4, RELEASE SOFTWARE (fc1) >ROM: MC3810 Software (MC3810-WBOOT-M), Version 12.0(6r)T4, RELEASE >SOFTWARE (fc1) > >As fas I understood reading the notes at: > >this box will recognize a 64MB DRAM. > >Am I correct? > >TIA > > >-Original Message- >From: Peter Whittle [mailto:[EMAIL PROTECTED]] >Sent: sexta-feira, 30 de novembro de 2001 21:40 >To: [EMAIL PROTECTED] >Subject: Re: VoIP MC-3810 [7:27874] > > >The MC-3810 supports VoIP if you have a v5 variant of the IOS. > >eg enterprise + voatm + voip would be mc3810-a2jsv5_122-3.bin > >Of course you need a voice module, AVM (analogue), BVM (ISDN Bri), >DVM (ISDN Pri, CAS) and any load will do vofr. > > >However, VoIP loads require 64 Mbytes DRAM. > >If you upgrade an old mc-3810 or mc-3810v you need recent BOOTROMs, >take >a look in the release notes for details. If your bootroms are not >recent >enough then a 64Mb SIMM will only show up as 16 Mb! The bootroms are a >free of charge item. You will have to pay postage and may need to >order >them via a partner if you don't have SMARTNET on the routers. > >Peter > > > In article , [EMAIL PROTECTED] > writes >>Just to confirm. Can a MC-3810 do VoIP or only VoFR? >> >>Thanks, >> >>Hugo >>html >>Report misconduct and Nondisclosure violations to >[EMAIL PROTECTED] >> > -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=27911&t=27874 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: VoIP MC-3810 [7:27874]
Hugo, Your sh ver looks promising. The definitive way is to look at the BOTTOM and see if they are p.n.: 17-4840 rev 03 or later. I believe that they contain System Bootstrap Version 12.0(6r)T4. By the way the 12.0(6r)T4 is the WBOOT code that you need to support 32 Mb Flash. You will need atleast 16 Mb Flash if you want to run current enterprise feature set. If you can get by with ip plus then you can get by with your existing 8 Mb. Remember, if money is tight and you have upgraded the DRAM to 64 Mb you could always boot the IOS from a TFTP server instead of from flash, just watch out when you do a 'wr erase' to clear out the configs as it will no longer know its ip address and you will end up running the flash IOS. Peter In article , [EMAIL PROTECTED] writes >Peter, > >Thank you for replying. Great info that the IOS image should contain >"v5" feature set. ;-)) > >The box is an MC-3810 (not V or V3) with 32MB DRAM and 8MB flash with >mc3810-is-mz.120-5.XK image. > >ROM: System Bootstrap, Version 12.0(6r)T4, RELEASE SOFTWARE (fc1) >ROM: MC3810 Software (MC3810-WBOOT-M), Version 12.0(6r)T4, RELEASE >SOFTWARE (fc1) > >As fas I understood reading the notes at: > >this box will recognize a 64MB DRAM. > >Am I correct? > >TIA > > >-Original Message- >From: Peter Whittle [mailto:[EMAIL PROTECTED]] >Sent: sexta-feira, 30 de novembro de 2001 21:40 >To: [EMAIL PROTECTED] >Subject: Re: VoIP MC-3810 [7:27874] > > >The MC-3810 supports VoIP if you have a v5 variant of the IOS. > >eg enterprise + voatm + voip would be mc3810-a2jsv5_122-3.bin > >Of course you need a voice module, AVM (analogue), BVM (ISDN Bri), >DVM (ISDN Pri, CAS) and any load will do vofr. > > >However, VoIP loads require 64 Mbytes DRAM. > >If you upgrade an old mc-3810 or mc-3810v you need recent BOOTROMs, >take >a look in the release notes for details. If your bootroms are not >recent >enough then a 64Mb SIMM will only show up as 16 Mb! The bootroms are a >free of charge item. You will have to pay postage and may need to >order >them via a partner if you don't have SMARTNET on the routers. > >Peter > > > In article , [EMAIL PROTECTED] > writes >>Just to confirm. Can a MC-3810 do VoIP or only VoFR? >> >>Thanks, >> >>Hugo >>html >>Report misconduct and Nondisclosure violations to >[EMAIL PROTECTED] >> > -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=27910&t=27874 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: VoIP MC-3810 [7:27874]
The MC-3810 supports VoIP if you have a v5 variant of the IOS. eg enterprise + voatm + voip would be mc3810-a2jsv5_122-3.bin Of course you need a voice module, AVM (analogue), BVM (ISDN Bri), DVM (ISDN Pri, CAS) and any load will do vofr. However, VoIP loads require 64 Mbytes DRAM. If you upgrade an old mc-3810 or mc-3810v you need recent BOOTROMs, take a look in the release notes for details. If your bootroms are not recent enough then a 64Mb SIMM will only show up as 16 Mb! The bootroms are a free of charge item. You will have to pay postage and may need to order them via a partner if you don't have SMARTNET on the routers. Peter In article , [EMAIL PROTECTED] writes >Just to confirm. Can a MC-3810 do VoIP or only VoFR? > >Thanks, > >Hugo >html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=27892&t=27874 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: ISDN Q.921 and Q.931 [7:27568]
I sent this to Priscilla on the topic and she suggested that the group might benefit from my response, so here it is. Priscilla, I think that you may find it helpful to separate end - to - end data transfer from signalling. Very few L2 protocols offer error correction. The modern approach is to require the L1 transmission to provide intrinsically reliable communication and hence it is a waste of bandwidth to implement error correction both on hop by hop and end to end basis as per X.25. Modern WAN digital transmission systems are designed to offer transmission error rates of fewer than 1 bit error in 10^9 bits. On Telco Wan links it is common on this side of the pond to require transmission media to offer error rates better than 1 in 10^9 and often 1 in 10^11. Indeed the commissioning tests call for fewer than 1 error in a 20 minute period on a basic E3 (34 Mb) link and fewer than 1 error in 24 hours on International links prior to acceptance from Transmission into Networks for operational trunks. That is not to say that links may not degrade but if the error rates became worse than 1 in 10^9 it would be time for Network operations to call 'holes & poles' (Transmission) to fix it. The fundamental assumptions in both Frame Relay and ATM is that they are running over intrinsically reliable transmission media. The low error rates being achieved either by correctly engineered transmission paths or by the use of significant forward error correction built in to the transmission equipment. ATM, and Frame Relay, implement error correction, or more precisely re- transmission in the interface to the signalling protocols. ISDN relies on the hop by hop error correction offered by LAPD. However, they tend to leave the issue of payload error correction to any high level end-to- end protocols being run on top of these L2 Datalinks. ATM offers no direct protection of payload content, the HEC only protects the ATM header. However, some AALs do offer protection if not correction of the payload. Even AAL5 - most common for IP has a check polynomial (CRC32) to protect the CS PDU. It performs error detection but not correction. In the case of Q.2931, SAAL (version of AAL5 to carry signalling) will detect faulty PDUs. If you want to look at ATM signalling take a look at Q.2931 essentially an enhanced and extended version of narrow band ISDN Q.931 signalling. Take a look at the ATM forum website. www.atmforum.org Frame Relay has Frame Check Sequence that again will detect faulty frames. (Incidentally Carrier Switches tend to drop frames with a faulty FCS). Incidentally Frame Relay is sometimes known as LAPF. Take a look at the frame relay forum web site. www.frforum.org there are some good white papers and the frf's recommendations that you can download. ISDN B channel - is a 64 Kbit clear channel and the network makes no assumptions about the contents. It could be any number of data formats or indeed it could be 64 K G.711 PCM voice. The most ubiquitous use of data over ISDN is to encapsulate it in PPP which is intrinsically multi- protocol. However, it is also possible to use HDLC, X.25, Frame Relay, or any number of specialist protocols. D channel usage is somewhat different. L2 on D channel is Q.921 (as you say also known as LAPD). It is perhaps worth pointing out the ISDN signalling is NOT an end to end protocol! ISDN signalling only traverses the single hop to the signalling processor on the nearest switch. This signalling processor then signals to the signalling processor of the next switch and finally the signalling processor on the last switch communicates with the far end CPE. In Public Carrier Networks the signalling between switches is normally SS7 or C7 as it is sometimes known. The D channel is normally used for signalling but in the case of Basic Rate may also be used for permanently on low speed data services such as X.31 (9k6 X.25 in D channel, which uses LAPD for L2 and normal X.25 L3) Q.931 is used on public networks to communicate with the Carrier's CO switch and is fairly primitive in its feature set. QSIG is essentially a superset of Q.931 used on private telephony networks to signal between PABXs and offers an enhanced set of features such as 'camp on extension', 'ring back when free', redirect calls etc. X.25 has hop by hop error detection and correction in L2 - LAPB and also end to end in the L3. Sometimes known as 'belt and braces' or 'The Pony Express' of data communications. 'We get the data through, eventually, no matter how crummy the analogue link is!' Not being of IBM extraction I am not in a position to comment on SDLC or Bisync. I hope that this helps Peter -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=27659&t=27568 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Catalyst 3900 [7:27131]
CAT2600 offers TrBRF & TrCRF and does Token Ring switching. So as a replacement for a few MAUs is fb. However, if you wish to practice on the menus then you need a 3900, 3920, or a simulator program. The 3900 menus are significantly different from the CAT2600 ones, though they basically offer the same sort of facilities. I think that you will find the question of 3900 vs 3920 pretty much academic as if you can program one of them then you can program the other and as far as postings on CCO go Cisco have stated that there is no longer any cabling to be done by the candidates. Peter In article , Patrick W. Bass writes >for that matter, would a cat 2600 work? > > wrote in message >[EMAIL PROTECTED]">news:[EMAIL PROTECTED]... >> Can someone who's taken the lab confirm if they got a Catalyst 3900 ? >> >> Did you get a model 3900 or a 3920 ? >> >> Also, could you use a T/R module in the Catalyst 5000 to do the same thing >> ? >> >> >> >> >> >> >> Dreaming of a Swiss Account? Get it here: http://freemail.swissinfo.org >html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=27265&t=27131 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: help me set clock on router [7:26435]
2500, 2600, 3600 routers do not have a calendar clock fitted, therefor when you turn the power off you loose the time & date. If you want a router with a built in battery backed clock then you need a larger router: e.g. 4500M, 4700M, 7000 series. (The 4000 & 4000M do not have calendar clocks) If you want to get the time and date set on the smaller routers at start up then you will need to configure NTP. You could use a 4500M etc as the source, get an NTP program for a PC, or use one of the master NTP sources on the Internet. Peter . In article , hk writes >Dear group >Psl show me Why is ? When I set clock on rouer 2500 ,2600,3660 serial , but >If I reload router . My router not save clock >then return *01:41:38.137 UTC Thu Mar 4 1993 > >Thank >html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=26721&t=26435 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Which MC3810 MFT E1 / T1 are software configurable [7:23594]
I understand from CCO that some versions of MC3810 MFT and DVM modules are software configurable between E1 and T1. Does anyone know which models and revisions are soft configure-able? If I follow the CCO article instructions and go into ROMmonitor mode and attempt to change the Trunk on my MFT-EUS it says that this function is not supported on an MFT-EUS. This would be rather convenient and significantly expand their usefulness. The MC3810v + AVM + MFT supports VoIP, VoATM, and offers E1 or T1 ATM, all in a router that goes on ebay for a similar price to a 2500 far less than a 2600 + NM-1V + VIC, even less than an NP-1A. (you also get 2 x UIO serial, 10Bt) Many Thanks, Peter -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=23594&t=23594 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CCIE Lab Setup [7:17399]
I have an Ackermann ISDN PABX (Euracom 262) in my home lab with which I am delighted. It has 3 internal S busses, 6 POTS ports and 1 external (public network facing) S bus. The list price new in the UK is about #750, less if you reduce the number of internal S busses that you wish to use. I hope that when I have passed the IE lab the resale value will be reasonable so the net cost will not be very much and certainly significantly less than the cost of an ISDN2 line from the local Telco. You can connect your routers to the internal S busses. It works very well with 2503, 2504 and WIC-1B ST and will allow all the dial options including multilink. The drawback is the UK version only supports ISDN SWITCH-TYPE BASIC-NET3. So no chance to practice your SPIDS. There is also a German version available, I am not sure if they make a U bus version for the US but it's fine for the rest of the world! They are designed for small branch office use in Germany where ISDN is very common. There are several other manufacturers of similar products. Further details from: http://www.ackermann.co.uk I hope this saves you some money! Peter In article , Dan Faulk writes >One way to save a good sum of money is to have the telco pull you a >2B1D(Bri) ISDN line and use one B channel per router. Does everthing except >multilink (and that can be done with a willing partner) and costs a lot less >than a simulator (most Ive seen run $1500-2500 compared to about $300 in >telco charges). Might want to do this towards the end to keep costs down and >cancel the service when finished. Anybody know a different way would be >great to hear it. >html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=17661&t=17399 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EA bit of ISDN and Frame Relay (also in HDLC) [7:11035]
loud. However, in reality most Telco Frame Relay networks run Frame Relay out to the customers and then use some proprietary protocol in the core between the edge switches. So the most likely place to find 3 and 4 octet Frame Relay headers would be on the Inter Carrier Interface between 2 different Frame Relay networks. This is really core Telco land and not Cisco CPE land. The control sub field is not used for Frame Relay. Frame Relay has a very simplistic approach to frame handling. All frames are un-numbered information frames. Frame Relay has no need of a control field! If you look a little closer at Frame Relay encapsulations to carry L3 you will see that they all start with the magic 03 as the first octet of what should be the payload. This makes them compatible with the rest of the HDLC based protocols. The HDLC header contains 2 sub fields the Address (this is used by Frame Relay for the frame header, containing dlci, DE bit, FECN bit, BECN bit, and a C/R bit) and the Control. An HDLC header Control field of 03 is an un-numbered information frame. I hope that this helps Peter >And you are also quite correct that no one has found a real reason to >use more than 10 bits. But the capability is there if it's needed. >We have a long history of running out of space in protocol fields -- >witness IPv4 addressess. > >Another good comparison is the difference in detailed protocol >message design in OSPF and ISIS. OSPF is designed for processing >efficiency. You will find that most important fields are aligned on >32-bit boundaries. There's a lot of bit-flag level encoding. > >ISIS, however, was designed for extensibility. Its optional fields >are in variable-length Type-Length-Value constructs, so it's much >easier to add features than it is to OSPF. > >Again, rememeber when these protocol were designed, conditions >weren't the same as they are today. Processors were much slower. >html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=11619&t=11035 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
7000 memory upgrade - memory spec [7:9647]
I have an old 7000 router with RP & SP in my home lab. The RP only has 16Mb ram fitted (4 x 4Mb), it is Hardware 1.2 rev D0 (pn 73-0877-06). Which according to CCO should upgrade to 64 MB (4 of 16Mb x 9 SIMMS). Does anyone know the spec for the SIMMS? Are they the same as any other router or PC platform? I am after a source of an inexpensive set for my home lab. Many thanks for the help Peter -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=9647&t=9647 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Config Register Weirdness, again... [7:9181]
I have fixed my 2620 by replacing the NVRAM chip 28c256N20, on mine it is U23 located on the mother board next to the BootROM. It is no more difficult to replace than a BootRom it is a 32 pin PLCC device and on a hardware 1.2 rev B0 (pn 73-2843-07) it is in a socket. Check on yours first, on older routers it was soldered to the mother board and replacement is non-trivial. You must follow normal antistatic precautions and take care when removing the chip. BTW the chip costs about #25 inc. vat and carriage from any of the major component suppliers in the UK. But make sure that you get an 'N' or 'J' version. They are 32 pin PLCC others are different form factors. In article , Peter Whittle writes >Check if your NVRAM is ok. > >I have a similar problem on a 2620. But in my case it is more obvious as >whenever you attempt to 'wr' to copy the running to start config you get >an error diagnostic. > >Failed to write environment to NVRAM. > >The copy itself seems to work ok. As far as I can see the 28C256N-20 >NVRAM chip is u/s? There are also some known issues with 11.3(2)xa4 >and NVRAM handling. > >BTW I also get the same error if I attempt a 'sync' command from rommon >to save the environment to NVRAM. > >Peter > > > >In article , EA Louie > writes >>- Original Message - >>From: John Neiberger >>To: >>Sent: Wednesday, June 20, 2001 7:46 AM >>Subject: Config Register Weirdness, again... [7:9181] >> >> >>> Okay, what's the deal here? Look at this output: >>> >>> Configuration register is 0x2102 (will be 0x4000 at next reload) >>> >>> RARAP#conf t >>> Enter configuration commands, one per line. End with CNTL/Z. >>> RARAP(config)#config-reg 0x2102 >>> RARAP(config)#end >>> RARAP#sho ver >>> Cisco Internetwork Operating System Software >>> >>> [lotsa trimming] >>> >>> Configuration register is 0x2102 (will be 0x3922 at next reload) >>> >>> Why is the config register going to reload at 0x3922?? I just set the >>> darn thing to 0x2102 and you can see that change occurred. I was trying >>> to get rid of the 'will be 0x4000 at next reload'. I have no idea why >>> that was there to begin with but it should not be there. Is this >>> something that I'll have to fix from the console port? I can't reload >>> the router because it was put into production this morning. Why is it >>> set to 0x3922? >>> >>> I'm guessing that the guy who installed this was playing around with >>> the confreg utility in rommon and we'll have to go back to rommon to fix >>> it. >>> >>> Any ideas? >> >>GREMLINS, or 2102 instead of 0x2102, or it's broken >> >>go in and config it *again* for config-reg 0x2102 and see if sh ver gives >>you yet another value 'at next reload' - maybe the config-reg statement on >>*your* router is really a random-number generator... >> >>:-) >> >>-e- >> >>> >>> Thanks, >>> John >>html >>Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] >> > -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=9504&t=9181 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Config Register Weirdness, again... [7:9181]
Check if your NVRAM is ok. I have a similar problem on a 2620. But in my case it is more obvious as whenever you attempt to 'wr' to copy the running to start config you get an error diagnostic. Failed to write environment to NVRAM. The copy itself seems to work ok. As far as I can see the 28C256N-20 NVRAM chip is u/s? There are also some known issues with 11.3(2)xa4 and NVRAM handling. BTW I also get the same error if I attempt a 'sync' command from rommon to save the environment to NVRAM. Peter In article , EA Louie writes >- Original Message - >From: John Neiberger >To: >Sent: Wednesday, June 20, 2001 7:46 AM >Subject: Config Register Weirdness, again... [7:9181] > > >> Okay, what's the deal here? Look at this output: >> >> Configuration register is 0x2102 (will be 0x4000 at next reload) >> >> RARAP#conf t >> Enter configuration commands, one per line. End with CNTL/Z. >> RARAP(config)#config-reg 0x2102 >> RARAP(config)#end >> RARAP#sho ver >> Cisco Internetwork Operating System Software >> >> [lotsa trimming] >> >> Configuration register is 0x2102 (will be 0x3922 at next reload) >> >> Why is the config register going to reload at 0x3922?? I just set the >> darn thing to 0x2102 and you can see that change occurred. I was trying >> to get rid of the 'will be 0x4000 at next reload'. I have no idea why >> that was there to begin with but it should not be there. Is this >> something that I'll have to fix from the console port? I can't reload >> the router because it was put into production this morning. Why is it >> set to 0x3922? >> >> I'm guessing that the guy who installed this was playing around with >> the confreg utility in rommon and we'll have to go back to rommon to fix >> it. >> >> Any ideas? > >GREMLINS, or 2102 instead of 0x2102, or it's broken > >go in and config it *again* for config-reg 0x2102 and see if sh ver gives >you yet another value 'at next reload' - maybe the config-reg statement on >*your* router is really a random-number generator... > >:-) > >-e- > >> >> Thanks, >> John >html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=9326&t=9181 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: ATM command to check CLP cell [7:3959]
RX stats on CLP bit are fairly meaningless in reality. The place that you are really interested in the stats is on the port on the carrier's switch that faces the far end of the network. It is that port on the carrier's switch that will normally set the CLP bit on traffic exceeding SCR. If you have a car service then there won't be any. If you are running any type of bursty traffic, and in a data world one might assume that you are then you will expect to receive cells with CLP set as you burst above SCR into PCR region. If the network is congested it may drop cells with CLP set, normally only when the SCT (severe congestion threshold) either for one of the ports or one of the switches as a whole has been exceeded. You will normally find out well before the network is severely congested because you will rx cells with EFCI bit set (Explicit Forward Congestion Indication, middle bit in the PTI on user cells, it has basically the same function as FECN in Frame Relay) when the traffic reaches the MCT (mild congestion threshold, typically 50% of port / switch capacity). If you really want to find out what is happening you can either put an ATM protocol analyser across the bearer at your end or replace the router with an ATM test set (such as a TTC750, a Fluke or an HP) In article , Cisco Newbie writes >Hi Groupstudy, > >Like to check is there any command in Cisco IOS that allows me to check >whether the cell I received has the Congestion Loss Priority (CLP) bit set? > >If not how could I find out whether the cells is eligible to be discard when >there is a congestionThru' Telco? > Set up a load test from the far end and wind up the load until you receive no more increase in throughput. The network will now be discarding all excess traffic. This should correspond to what you are paying for in the PCR of the virtual channel / virtual path. > >Definition of CLP: Congestion Loss Priority (CLP)---Indicates whether the >cell should be discarded if it encounters extreme congestion as it moves >through the network. If the CLP bit equals 1, the cell should be discarded >in preference to cells with the CLP bit equal to zero. > > >Thanx >_ >Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. >FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco. >html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > Hope that helps Peter -- Peter Whittle Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=4336&t=3959 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Tacacs+/Radius
Kevin, Ascend (Now Lucent) use to have the sources for the generic Livingston Radius server on their web site under the support area. You might also try a search on RADIUS or Livingston on your favourite search engine. You will need to compile them using gnu C. When I last played with them ( a few years back) the sources were meant to be an example of a RADIUS server. They handle the RADIUS protocol including accounting but are implemented using a flat text file instead of a database. On a Sparc 20 it would cope reasonably with c. 3 or 400 users. If you want an example to play with then get the sources and have a go. You could always add database calls to access the user records and support more users. The other draw back is the standard freebie sources did not include a form entry system to verify and to populate the database. User record entry tool was called 'vi' and a comma in the wrong place and it didn't work! If you want a production platform with decent performance user record validation then you will have to pay for a commercial one. Hope that that helps. Peter Kevin Wigle wrote: > and further on things tacacs.. > > Our lab tech is really an anti-NT type of guy. He doesn't want any > production servers using NT. > > And he also would prefer Radius over Tacacs+. Does anyone have a source of > freeware Radius for unix? His preferred platform is Solaris. > > again, tia > > Kevin Wigle > > _ > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Seeking ISP study partners, Midlands UK
Anyone in the Midlands area in the UK seriously interested in going for CCIE ISP DIAL before it disappears? I am based near Birmingham and work for a Telco. Peter _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CIPT 2.0 - flapping CAT 6608
I've found a work arround. 1) Must use 5.5.1 or later firmware. On earlier versions when the E1 port flaps it takes out the entire CAT6K 2) Disabling any unused E1 ports does not fix the problem but helps increase the interval between flaps. 3) All E1 ports MUST be registered with a Call Manager. Although the CAT itself is configured from CLI it takes some of its information from CCM via DHCP and TFTP. If it is not registered it does not get the correct LOAD file from CCM. This is similar to the problem with an old VIP30 phone continually trying to reboot when there is no valid load for it. Hope that helps anyone else setting up the CAT for CIPT. peter whittle wrote: > Hi, > > I am working towards CIPT 2.0 (Cisco Call Manager v3.0) exam. > > I have a CAT 6K in the core with 6608 (8 port E1 blade) as per the CIPT > LABs. > > The problem is that the 6608 resets itself after about 40 S, making it > very difficult to complete a call over the E1 link. > > It seems to help if I disable the unused (un-terminated) E1 ports. > > However, the 6608 still resets itself all be it not quite so frequently. > > I have tried a 2nd SUP 1A 2GE card, a different PSU and a different 6608 > > blade - all without success! > > Any ideas? > > Thanks > > Peter > > _ > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Sat CID Beta Wrong paper???
I sat the CID Beta yesterday, or rather that is what I booked for, that is what it said at the end but the heading throughout the paper itself was 'Cisco Secure VPN' and the questions were certainly more akin to VPN security than Design. Has anyone else had a similar experience / problem? Peter _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
CIPT 2.0 - flapping CAT 6608
Hi, I am working towards CIPT 2.0 (Cisco Call Manager v3.0) exam. I have a CAT 6K in the core with 6608 (8 port E1 blade) as per the CIPT LABs. The problem is that the 6608 resets itself after about 40 S, making it very difficult to complete a call over the E1 link. It seems to help if I disable the unused (un-terminated) E1 ports. However, the 6608 still resets itself all be it not quite so frequently. I have tried a 2nd SUP 1A 2GE card, a different PSU and a different 6608 blade - all without success! Any ideas? Thanks Peter _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
CIPT 2 courses outside USA
IP Telephony specialisation - Cisco Call Manager v3 == Has any member of the group located a Cisco Training Partner outside USA (In Europe) that is in a position to deliver CIPT 2 course ie based on Call Manager v3? None of the UK training partners appear to able to deliver due to delays in shipment of WS 6608 8 Port E1 blade for CAT6000s from Cisco. Failing that does anyone know of a current CD-ROM or Web based version of the course. I have found a reference to a new CD-ROM available to partners but currently it is out of stock. (I presume that that means not yet released.) Many thanks Peter **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
CIPT 2.0 Exam
Hi, Is anyone upto date on CIPT? Is the CIPT exam 9E0-569 an updated version to reflect CIPT 2.0 course changes and Cisco Call Manager v3.0xxx? I gather that there was a new Beta 9E1-569 on trial in August, has this now been released? Does anyone know where the syllabus / exam objectives are? The entries on CCO do not have active hypertext links. Thanks Peter **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Archives -What happened to them?
Help! I have just tried to get at the archives under the re-designed GroupStudy. All I get is a blank screen with a Document Done message. What happened to the old FAQ and old archives? (I am using Netscape Communicator 4.7 on WIN95 PC) Many Thanks Peter **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Looking for CVOICE Books
Dorothy Further info pulver.com, Inc. produce a regular VoN newsletter. With latest news, articles and things related to VoN. It is not directly CVOICE study material but does provide additional background / insight. THE PULVER REPORT(TM) Provided by: pulver.com, Inc. YOU CAN VISIT http://pulver.com/reports/subscribe.html TO SUBSCRIBE. TO UNSUBSCRIBE, PLEASE VIST http://pulver.com/reports/unsubscribe.html Peter ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Looking for CVOICE Books
The following are my own personal opinions and observations and are not meant to represent the official views of the company that I work for. I have recently passed CVOICE 1.0 A few personal comments: The exam I sat was based very heavily upon CVOICE course notes. So a set of CVOICE course notes are essential. It is not too difficult. No where near as much material as for ACRC. There are a lot of type in the command 'letter perfect' questions (about 14 - 20 ish in my case) No problems if you can do show & configure basic voice over FR, ATM, & IP. 1) CVOICE is Voice over Frame Relay (significant part), ATM (some questions), and IP (of course). 2) The 640-447 CVOICE exam is on the CVOICE v1.0 course. (The CVOICE notes may not be the best introduction to VoN but they are the gospel if you want to pass CVOICE. The lecturer on the course that I attended skipped some very significant sections of the notes. You need to study all chapters! It is helpful if you can get 'hands on' with the full range of kit ie 26xx/36xx, 3810, & 5300 and know their main features). I attended the old v1.0 CVOICE. There is a new version available/about to be available that is reputed to be an improvement. I found the CVOICE 1.0 course a bit primitive and out of date. It was really aimed at the bottom end of the market; 2-4 voice ports perhaps up to 60. Essentially aimed at Branch Office / Medium Corporate connect and not at Carrier Grade solutions. Watch out for a very strong USA telephony bias. I am not sure that they have ever heard of E1 CAS, AC15, nor DPNSS - More of a problem if you come from Europe. Though remember it's Cisco's course, it's their exam and if you want to pass Other sources have better explanations of the concepts. BOOKS == The books that I found are all VoIP and on the whole quite good though none of them were CVOICE study guides. Be aware that CVOICE is Voice over Frame Relay, ATM, & IP - not just VoIP. Cisco Voice over IP - Elliot Lewis ISBN 1-928994-03-2 A good introduction to intermediate level book on VoIP; includes some configs. Not very good for CVOICE exam - too much out of scope material. Does not cover telephony, VoFR, VoATM in enough detail for CVOICE. (But to be fair it claims to be a VoIP book not a CVOICE study guide.) Covers : H.323, Gatekeepers, Selsius AVVID, Cisco Call Manager (Soft PBX) & Fax over IP - This is useful material but are all OT as far as CVOICE 1.0. Solutions are aimed mainly at Branch Office / Corporate connections and not Carrier Grade. Does not particularly address the issues of serialisation delay and the various forms of link fragmentation. In short quite a good introductory book with some good explanations as far as it goes - But not a CVOICE study guide. Cisco Packetised Voice & Data - Robert Caputo ISBN Excellent introduction to intermediate level coverage of VoN technologies and concepts. Includes a lot of example configs. Particularly good introduction to analogue telephony, though like most books very much biased to USA telephony. Excellent coverage of QoS issues particularly for VoIP carried over Frame Relay. Good introduction to Dial Plans and Hunt Groups. Aimed at medium scale solutions, weak on coverage of Carrier Grade solutions. Not very good for CVOICE exam - too much out of scope material and weak on its coverage of VoFR and VoATM. In short a good introductory / intermediate book worth reading - But not a CVOICE study guide. Voice over IP Fundamentals - Jonathan Davidson ISBN 1-57870-168-6 A good intermediate level VoIP concepts and principles book. Very few example configs. Not very good for CVOICE exam - too much out of scope material, goes into too much depth and is too advanced. In developing your understanding of VoIP - excellent. Very good if you want to understand the more advanced concepts or as a VoIP reference guide. It has good coverage of telephony concepts particularly in the Enterprise, including ISDN, Q.931, QSIG,& SS7. It includes a substantial introduction to and discussion of Qos issues. Excellent coverage of H.323, gatekeepers and virtual switches. Certainly well worth reading and keeping as a reference book. But is not a CVOICE study guide. If you have a limited budget I would buy Caputo's book. If you want to go further then Davidson's definitely has a place on my bookshelf. Peter ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RJ45 & RJ48 difference
Hi, What is the difference between an RJ45 connector as used on 10Bt and an RJ48 connector as used on 120R Primary rate? They both appear to be the same 8 pin idc connector. Thanks Peter ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Vofr on 2621
I am working on Cvoice exam and I am having some difficulty with getting vofr to work. I have 2 x 2621 running IOS 12.07 T with NM2V and VIC-2FXS, & Wic1T linked together either via serial port or via ethernet. Routers R1W1 and R2W2. I can make local calls from one FXS port to another port ok. I can also make VoIP calls over ethernet from a FXS port on R1W1 to FXS port on R2W2 ok. I can also make VoIP calls across Frame Relay cloud. dlc 32 carrying NLPID encapsulated IP ok. When I try to make Vofr calls across Frame Relay cloud, dlc 16. I get nothing! LMI is fine, and up (lmi-type ansi) debug frame-relay packet shows dlc 32 active when I make VoIP calls with NLPID encapsulation but there are no frames sent / received for Vofr. The phone gives nu tones. Does any one have a working vofr config or know of a problem with vofr? Many thanks Peter ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Frame Relay Interworking with ATM
Kamoto There are normally 2 basic methods of interworking ATM with Frame Relay which are normally handled by a FRATM. They are: Network Interworking Function (NIWF) Service Interworking Function (SIWF) NIWFs work in pairs, have both a Frame i/f and an ATM cell based i/f. Basically they carry the Frame Relay frame less flags and fcs. As far as the Frame Relay nodes are concerned, you are effectively using the ATM cloud as a virtual piece of wire. You can carry many dlcs in a single virtual channel. You only need 1 SIWF, again it has both a Frame i/f and a cell i/f.It takes the payload out of Frame Relay and repackages it into ATM. You require a separate virtual channel for each dlc. Both normally use aal5 encapsulation. Hope this helps Peter ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Cisco E1 IMA compatible with Newbridge?
Hi, Does anyone know if Cisco E1 ATM IMA will interwork with Newbridge 36170 IMA? Thanks Peter ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Async PPP dial-i on AUX
Hi all, I am interested in configuring the AUX port with external modem to handle ppp dial in on either a 2500 or a 4000. Does any one know of a reference where I can find out more about using the aux port as another port rather than as a terminal port? The location of a specimen configuration would be appreciated. Thanks Peter email [EMAIL PROTECTED] ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
