Re: Please Help - CIDR - How the bits work [7:75050]
Fred, OSPF was just moved into the CCNA 3.0 Acad. which is JUST being released now. I wish we would have coverd that, and other things you mention. Steve Reimer, Fred wrote: May be I had advanced access to the new NA material then ;-) In my view, a NA should be able to handle basic RIP, OSPF, EIGRP in a small to medium sized network. That would certainly include CIDR. A NP, IMO, would be for advanced RIP, OSPF, EIGRP, and basic BGP, like for configuring a mid-large sized network for connection to the Internet including minimal BGP. IE, IMO, is for ISP engineers that have to deal with extensive IS-IS, BGP using all options, etc, and large to huge (global) networks. May be I'm just expecting too much, but if you don't understand CIDR you shouldn't be allowed anywhere near a router, let alone be responsible for configuring them. Fred Reimer - CCNA Eclipsys Corporation, 200 Ashford Center North, Atlanta, GA 30338 Phone: 404-847-5177 Cell: 770-490-3071 Pager: 888-260-2050 NOTICE; This email contains confidential or proprietary information which may be legally privileged. It is intended only for the named recipient(s). If an addressing or transmission error has misdirected the email, please notify the author by replying to this message. If you are not the named recipient, you are not authorized to use, disclose, distribute, copy, print or rely on this email, and should immediately delete it from your computer. -Original Message- From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 09, 2003 12:33 PM To: [EMAIL PROTECTED] Subject: RE: Please Help - CIDR - How the bits work [7:75050] Reimer, Fred wrote: No offense, but this is CCNA material. Do they still teach classful for CCNA, though? Perhaps the only thing that's hard for him is that 192.168.24.0 has a mask of 255.255.255.0 in a classful system. Moving the prefix over to the left of that classful boundary isn't something they teach for CCNA yet. (They will soon. The new Networking Academy books teach it from the start now.) Priscilla If you are going for your CCNP, then you should already have your CCNA and know the answer. But anyway... If you need a network with 400 hosts, the smallest subnet would have a /23 mask. So take the first part of your given network and assign it to that: 192.168.24.0/23 (192.168.24.0-192.168.25.255) Then you need one with 200 hosts. Well, that could fit within a /24 subnet, so assign the next available to that: 192.168.26.0/24 (192.168.26.0-192.168.26.255) Now you only have 192.168.27.0/24 left from the original 192.168.24.0/23 (which covered 192.168.24.0-192.168.27.255). You need two 50's, so that should fit within /26 subnets each. Assign them: 192.168.27.0/26 (192.168.27.0-192.168.27.63) 192.168.27.64/26 (192.168.27.64-192.168.27.191) Finally, you need three subnets that can have two hosts each, which would fit within /30 subnets. So assign: 192.168.27.192/30 192.168.27.196/30 192.168.27.200/30 Fred Reimer - CCNA Eclipsys Corporation, 200 Ashford Center North, Atlanta, GA 30338 Phone: 404-847-5177 Cell: 770-490-3071 Pager: 888-260-2050 NOTICE; This email contains confidential or proprietary information which may be legally privileged. It is intended only for the named recipient(s). If an addressing or transmission error has misdirected the email, please notify the author by replying to this message. If you are not the named recipient, you are not authorized to use, disclose, distribute, copy, print or rely on this email, and should immediately delete it from your computer. -Original Message- From: Steven Aiello [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 09, 2003 8:02 AM To: [EMAIL PROTECTED] Subject: Please Help - CIDR - How the bits work [7:75050] I just started my routing class for my CCNP. We are covering CIDR. The book is VEERY vague on how the bit patterns break down and are used. This was a problem posed in one of my CCNP labs I have network number 192.168.24.0 / 22 from this I need networks with 400 hosts 200 hosts 50 hosts 50 hosts 2 hosts (for serial int - no ip un-numbered allowed ) 2 hosts 2 hosts Also no NATing Thanks all I really could use the help Steve **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=75169t=75050 -- **Please
Re: Studying Switching [7:75030]
No sorry I know that peom, no spanning in there at all. LoL Steve Tom Lisa wrote: Priscilla, Didn't Radia write a poem that starts something like I have never seen a tree as lovely as a spanning tree? BTW, is it still possible to get a free copy of 802.1s w. I looked on the IEEE site but couldn't find them. Prof. Tom Lisa, CCAI Community College of Southern Nevada Cisco ATC/Regional Networking Academy Cunctando restituit rem Priscilla Oppenheimer wrote: Get a copy of Cisco LAN Switching by Kennedy Clark and Kevin Hamilton. It's right up there with Doyle as one of the best networking books ever written. It makes switching fun again! ;-) It's well written, technicaly accurate and interesting, and it doesn't just throw the latest marketing trends at you with no explanation of their history, like some switching material does. Also, CertificationZone has some good articles and study materials for switching. By the way, switching isn't as dull as it might seem. The spanning tree algorithm can be quite interesting to study. And there are enhancements to it now like 802.1s (multiple spanning trees) and 802.1w (rapid spanning tree protocol). Good luck! Priscilla Oppenheimer Nakul Malik wrote: Hi all, I started off studying routing and found it to be a topic that interested me a lot. I just couldn't get enough of halabi Doyle and the rest. I studied a lot, practiced a lot and was thrilled when I passed the exam in beta. Next I started studying for switching. That didn't turn out as well as I thought it would. I couldn't just work up the same level of interest. I have been analyzing the reasons and have come up with the following: 1. I've never worked with switches much, so I don't know too much about them, as opposed to routers. 2. Study materials. I've been wondering, has anyone else faced similar problems in their quest for CCNP. Also, could someone recommend some good materials/resources for switching other than the official Cisco book? Any/all answers would be appreciated. Thanks. -N -- Nakul Malik H-342 New Rajendra Nagar New Delhi - 110060 Mobile: +91-9811424477 Ph: +91-11- 2582 3488 +91-11- 2585 0155 Fax:: +91-11- 2575 2904 [EMAIL PROTECTED] **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=75168t=75030 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
??? Dumb Consultant ??? - Please Help [7:75213]
Hello all, I need some folks with hopefully a CCIE to answer this question. If there is an un subnetted class A, and there are 25 or users on the network. would the fact that the network is unsubnetted cause a large load of network traffic? here is the reason and layout. Our company uses Xerox printers and they came with address 10.6.1.45 - 255.0.0.0 10.6.1.44 - 255.0.0.0 our clients are all on the same network using a DHCP pool of 10.6.1.100 - 10.6.1.150 even if there is broadcast it is one message across the network (lets say for Netbios name resolution) there is one broadcast not a unicast to 16,7xx,xxx some host. Only 25 hosts will answer correct? So how will a class A subnet mask cause this? Thanks for all input, please feel free to ramble, Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=75213t=75213 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Please Help - CIDR - How the bits work [7:75050]
I just started my routing class for my CCNP. We are covering CIDR. The book is VEERY vague on how the bit patterns break down and are used. This was a problem posed in one of my CCNP labs I have network number 192.168.24.0 / 22 from this I need networks with 400 hosts 200 hosts 50 hosts 50 hosts 2 hosts (for serial int - no ip un-numbered allowed ) 2 hosts 2 hosts Also no NATing Thanks all I really could use the help Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=75050t=75050 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
CIDR - I was dumb - thanks every one [7:75079]
I think I was over looking something very simple. CLASS-LESS! If I understand things correctly. If I have 10 bits for my host section I have a total of 1024 hosts. What I was stuck on is liner break down dividing subnets in factors of 2. But ( here was my mistake ) by powers of 2, I'm not sure if I'm explaining it right, but I think I got it. I was over thinking the problem! Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=75079t=75079 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Good network monitor prog. ??? [7:75081]
Any one know of a good network monitor prog.? It doesn't have to be free but not to expensive. My budget is nill. Any recomendations? Thanks, Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=75081t=75081 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Re: Please Help - CIDR - How the bits work What I figured out [7:75086]
Priscilla Oppenheimer wrote: Reimer, Fred wrote: No offense, but this is CCNA material. Do they still teach classful for CCNA, though? Perhaps the only thing that's hard for him is that 192.168.24.0 has a mask of 255.255.255.0 in a classful system. Moving the prefix over to the left of that classful boundary isn't something they teach for CCNA yet. (They will soon. The new Networking Academy books teach it from the start now.) Priscilla If you are going for your CCNP, then you should already have your CCNA and know the answer. But anyway... If you need a network with 400 hosts, the smallest subnet would have a /23 mask. So take the first part of your given network and assign it to that: 192.168.24.0/23 (192.168.24.0-192.168.25.255) Then you need one with 200 hosts. Well, that could fit within a /24 subnet, so assign the next available to that: 192.168.26.0/24 (192.168.26.0-192.168.26.255) Now you only have 192.168.27.0/24 left from the original 192.168.24.0/23 (which covered 192.168.24.0-192.168.27.255). You need two 50's, so that should fit within /26 subnets each. Assign them: 192.168.27.0/26 (192.168.27.0-192.168.27.63) 192.168.27.64/26 (192.168.27.64-192.168.27.191) Finally, you need three subnets that can have two hosts each, which would fit within /30 subnets. So assign: 192.168.27.192/30 192.168.27.196/30 192.168.27.200/30 Fred Reimer - CCNA Eclipsys Corporation, 200 Ashford Center North, Atlanta, GA 30338 Phone: 404-847-5177 Cell: 770-490-3071 Pager: 888-260-2050 NOTICE; This email contains confidential or proprietary information which may be legally privileged. It is intended only for the named recipient(s). If an addressing or transmission error has misdirected the email, please notify the author by replying to this message. If you are not the named recipient, you are not authorized to use, disclose, distribute, copy, print or rely on this email, and should immediately delete it from your computer. -Original Message- From: Steven Aiello [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 09, 2003 8:02 AM To: [EMAIL PROTECTED] Subject: Please Help - CIDR - How the bits work [7:75050] I just started my routing class for my CCNP. We are covering CIDR. The book is VEERY vague on how the bit patterns break down and are used. This was a problem posed in one of my CCNP labs I have network number 192.168.24.0 / 22 from this I need networks with 400 hosts 200 hosts 50 hosts 50 hosts 2 hosts (for serial int - no ip un-numbered allowed ) 2 hosts 2 hosts Also no NATing Thanks all I really could use the help Steve **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=75086t=75086 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
IP Subnet calc. [7:75085]
Any one know a good free subnet calc. After realizing how many break downs, and how many subnetworks you would have to figure for CIDR, I would rather not do it with pan and paper. Free is good, for the calc. cost. Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=75085t=75085 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Re: Please Help - CIDR - How the bits work What I figured out [7:75087]
I was stuck on the idea that you could ONLY re subnet a remaining piece of a subnetwork. And not apply a mask to the whole span of the total available network. You can (unless I'm incorrect here) you just have to watch out for address over lap neer your subnetwork boundries. I think I got it. Man I love this news group! Steve Priscilla Oppenheimer wrote: Reimer, Fred wrote: No offense, but this is CCNA material. Do they still teach classful for CCNA, though? Perhaps the only thing that's hard for him is that 192.168.24.0 has a mask of 255.255.255.0 in a classful system. Moving the prefix over to the left of that classful boundary isn't something they teach for CCNA yet. (They will soon. The new Networking Academy books teach it from the start now.) Priscilla If you are going for your CCNP, then you should already have your CCNA and know the answer. But anyway... If you need a network with 400 hosts, the smallest subnet would have a /23 mask. So take the first part of your given network and assign it to that: 192.168.24.0/23 (192.168.24.0-192.168.25.255) Then you need one with 200 hosts. Well, that could fit within a /24 subnet, so assign the next available to that: 192.168.26.0/24 (192.168.26.0-192.168.26.255) Now you only have 192.168.27.0/24 left from the original 192.168.24.0/23 (which covered 192.168.24.0-192.168.27.255). You need two 50's, so that should fit within /26 subnets each. Assign them: 192.168.27.0/26 (192.168.27.0-192.168.27.63) 192.168.27.64/26 (192.168.27.64-192.168.27.191) Finally, you need three subnets that can have two hosts each, which would fit within /30 subnets. So assign: 192.168.27.192/30 192.168.27.196/30 192.168.27.200/30 Fred Reimer - CCNA Eclipsys Corporation, 200 Ashford Center North, Atlanta, GA 30338 Phone: 404-847-5177 Cell: 770-490-3071 Pager: 888-260-2050 NOTICE; This email contains confidential or proprietary information which may be legally privileged. It is intended only for the named recipient(s). If an addressing or transmission error has misdirected the email, please notify the author by replying to this message. If you are not the named recipient, you are not authorized to use, disclose, distribute, copy, print or rely on this email, and should immediately delete it from your computer. -Original Message- From: Steven Aiello [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 09, 2003 8:02 AM To: [EMAIL PROTECTED] Subject: Please Help - CIDR - How the bits work [7:75050] I just started my routing class for my CCNP. We are covering CIDR. The book is VEERY vague on how the bit patterns break down and are used. This was a problem posed in one of my CCNP labs I have network number 192.168.24.0 / 22 from this I need networks with 400 hosts 200 hosts 50 hosts 50 hosts 2 hosts (for serial int - no ip un-numbered allowed ) 2 hosts 2 hosts Also no NATing Thanks all I really could use the help Steve **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=75087t=75087 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Cisco Vs. Low cost switches -Whats the Diff ? [7:74987]
Ok, So I know there is a big difference in the cost and performance of Cisco (even lower end models) and let say a netgear switch. But where do the difference lay? I know that there are memory issues and back plain differences in these 2 classes of switches. But how do I find out what a lower cost switch will perform like. I was doing some bench marking on a NetGear 100Mb switch, between a large file transfer off a Win2k Server and a client. The through put was only a few Meg a best. The NIC in the server is a Gbit NIC and shouldn't be over whelmed by a simple file transfer. (I was running this while every one else was out of office so I know that's not an issue). I know that with Ethernet there is collisions and the like so I may not get true 100Mb performance but the results were horrible. What should I look for even in lower cost switches to be sure I get at least decent performance out of them? Even if you ramble on in this point, GREAT! The more you know the better I say. Thanks all, Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=74987t=74987 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
??? Layer 2 routing ??? [7:74788]
Ok all I have a question on this subject. I know routing takes place at the network layer, and switching takes place at the data link layer because it works based on physical addresses. So how do we get route switching? I've just started my CCNP and we were learning about different cache methods to speed up performance, is this how route switching is done, is the routing calculation be performed on a per packet basis? I was reading that by default, Cisco routers only perform a routing calculation on the first packet for a destination network and then on less the no route-cache option is set all the rest of the packets are really only switched to the correct interface. Am I missing something? I would invision that a router would by default perform a lookup for each connection sequence. does layer 3 routing not do a look up for each sequence of packet? Does is look at an address and use an old pre say route that was cached in memory? If some one can give a good explanation I would greatly appreciate it. Thanks, Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=74788t=74788 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
??? Cisco Express Forwarding ??? [7:74794]
Another question, in CEF is the whole routing table held in a cache? If so what is the diffrence between this and the routing table held in RAM? Is the cache faster than the regular RAM in the router? Thanks, Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=74794t=74794 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Point to Point for a 26xx and a Watchguard SOHO [7:74719]
Hello all, I was wondering if any one has configured a Cisco and a Watchguard SOHO in Point to Point configuration to save on IP public IP addresses? Here is my situation. I have 1 router with 2 FE interfaces. There are 2 companies sharing a T1 line in a single building. One company wants to add VPN support for a home user. I would like to use Watchguard SOHO's at each end for easy setup (client is a MAC). Has any one set up a PtP interface with a WG SOHO? I saw in the instructions that the SOHO will support PPPoE. Can I use this in any way or am I stuck using IP addresses? Any ideas are appreciated. Steve - Still a Lowly CCNA ( But Starting CCNP classes today! ) Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=74719t=74719 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Off topic - MCSE study groups [7:74112]
Hay, Any one know of some good MCP or MCSE study groups? If so can let me know the news server? Thanks all, Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=74112t=74112 -- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Example of reflexive access list with VPN access [7:73269]
Hello all, I need some help with ACL's. What my goal is to allow VNP traffic in to my network to one firewall (Static IP address). Also I want to allow traffic out of my FE 0/1 interface out to the net using established access lists. The services I want to let out are. HTTP HTTPS SMTP POP3 FTP SFTP If some one could help me out with a good start or at least a good explanation of the process and how established or reflexive lists work. my network set up is fairly simple ( internet )---Serial 0/1 |CISCO 2621XM| FE 0/1 (continued below) FE 0/1--|Firewall 1| 12.40.100.131 (Needs VPN port passed through) \ \ \ |Firewall 2| 12.40.100.132 (NO VPN ACCESS) All users need the above services. Thanks for all your help, Steven - CCNA Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=73269t=73269 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CCNP MCSE hands on [7:73284]
you need an account on the 2k box with the cumputer name of the win 9x box. Then if you try to access the box it should ask you for a password. Simply enter the one you set and your good to go. Oh also do you have the client for MS networks installed Steve [EMAIL PROTECTED] wrote: Hi all, I have recently passed the CCNP but have little experience. I have started working on the MCSE Win2K Server. I have tried to get hands on practice by networking my desktop and laptop, and maybe add from there. But I can't even get the two to talk. Could someone please give a little advice?? I can ping but the Win98 laptop says it has no access to the network, whatever that means. The Win2K desktop seems to be able to see the whole C:\ drive of the laptop. I have used the HELP file and read books. I have run out of ideas. -edgar San Diego, CA Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=73289t=73284 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Microsoft VPN through a router [7:72824]
I was wondering what ports I would need to have open for a Microsoft VPN connection on my router. If I have done my home work correctly I think IPSec port: 50 L2TP port : 1701 PPTP port : 1723 Are these all TCP, UDP??? I don't really have a full understanding of how the protocal and port process of a VPN works. I understand the theroy; how IPSec incryptes the info in a tunnel data portion of another IP packet blaa blaa blaa. But any more aditional detailed info would be great. Thanks, Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=72908t=72824 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Microsoft VPN through a router [7:72824]
I was wondering what ports I would need to have open for a Microsoft VPN connection on my router. If I have done my home work correctly I think IPSec port: 50 L2TP port : 1701 PPTP port : 1723 Are these all TCP, UDP??? I don't really have a full understanding of how the protocal and port process of a VPN works. I understand the theroy; how IPSec incryptes the info in a tunnel data portion of another IP packet blaa blaa blaa. But any more aditional detailed info would be great. Thanks, Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=72824t=72824 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: hacking challenge [7:66720]
Depending on the servers you could do it in 5 min. There is an annonamys account that runs over netbios in the 130's port area. If there isn't a firewall in place to filer this port you can use the net use command and have access to the box. After this you can download the backup copy of the SAM off the server run a crack program like lophtcrack and BLING BLING. You have every user name and password on the system. All to easy. I would recommend the Hacking Exposed book. If you want to protect your system from cracker / hackers. You need to know what they can and will do to get what they want. However don't let a firewall be your end all do all solution. Look into hardening you Server OS, if its Win2k try learning about group policy's they are a wonderful addition. If it's Novell or Linux, sorry I can't be much help. But the rule applies Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=66753t=66720 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Speed Duplex Talk again [7:66402]
Ok seeing as how were talking about duplex mismatches. I have one workstation on my LAN that is clearly a dog when it comes to network traffic. I have set it to all different duplex settings and speeds, hoping to notice a change. How would I detect if there was a speed type mis-match? I'm not getting any errors on the workstation. The switch I have it not manageable. It is for a smaller LAN 10 - 15 users. But we do transfer VERY large files all day. None of the other workstations have this prob. And this box is a P4 1.5Ghz with 512 RAM. So I know there is no prob with the horse power of the box. Can I look at the packets with a sniffer? If so what should I look for? Help, ahh Thanks, Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=66552t=66402 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: DS3 bandwidth issues [7:65790]
Wow Thank you sooo much. This is the best explanation of T-carrier Vs. Dx-Carrier I've ever read. I work in the IT field for some time, but not to much in the telco side and I could never really find what the difference was. THANKS A TON Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=65922t=65790 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: is 10baseT dead? [7:65263]
Ok, I am still a lowly CCNA however Einstein said make things as simple as they need to be and no more. I work on a LAN where we transmit large print files to Xerox laser printers. These files can get up to 1.5Gb in size and sometimes a bit larger. The Printers run on older Sun workstations and they have 10Mb cards. I have never come across a situation where the server has been able to over flow first of all the switches buffer and second of all it's NICs buffer. I know I am not the only sys admin who randomly sits on the network with a packet sniffer and analyses traffic from the major sources of traffic on their network, yes sometimes there will be some retransmit requests by the Xerox workstations however nothing of large significance. Also these retransmits usually occur when another workstation is processing a separate file also about 1Gb or more and that data is being transferred over the network from workstation so the server. Also what kind of network environment would you be in where your server would be slammin one workstation? Even real-time video would create this type of overload, especially since I can imaging it would be run over UDP and packets would be dropped if they were out of order. Theoretically you may be able to overwhelm a 10base T card however I would even doubt that considering the windowing and source quenching built into TCP/IP (source quench may be the wrong term but you all should know what I am talking about). I think it is far better to have the bandwidth ready and available then to fall short. That's just my opinion on the humble, Steven Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=65357t=65263 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CCIE [7:65426]
Wow, I am so much more motivated to get my CCIE now. ahaha, that was hilarious. Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=65444t=65426 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: is 10baseT dead? [7:65077]
Scott, I think you have a great point, it seems that most of the computer technologies we have today are not taken full advantage of. However instead of taking the air out the sale's staff sales as it were ( no pun intended ). Why not suggest upgrade from the Idf's to the server farm. You could suggest Ether Channel to combine some of the runs you have put in ( I'm sure ) when you are upgrading your networks. This way you have more bandwidth to the server farm and fault tolerance. WOW now that's a selling point. Also it can be done with out raising up the costs on hardware to much. You can get duel interface NIC's for your servers that are fairly reasonable now. I am amazed at the push for processor speed now, I can think if very few people that NEED 3Ghz with 2Gb of RAM. However no one NEEDS a Jaguar eigther, some people just want it and if they can afford it so be it. Look at the situation this way at least if your going for over kill the network will perform well, that is better than underselling and then having your clients be upset because they are limited in the future. But hay that's just my 2 cents. Take it with a grain of salt. = ) Steven Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=65181t=65077 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
??? CCS ??? [7:65056]
Why can I not access some of the links people are posting point to Cisco's web site. It asks for a CCS login? Can any one get one and how would I go about it? Thanks, Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=65056t=65056 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: PRI [7:64999]
If I remember correctly there are 64 channels in a PRI ISDN. I could be wrong it was one of things I memorized for my CCNA. Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=65055t=64999 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
??? MPLS ??? [7:64898]
Sorry for such a newbe question. But what is MPLS? And what is it? Any one have a link they can point me too? Just trying to learn more. Thanks, Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64898t=64898 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
??? Etherchannel ??? [7:64900]
Ok please don't be annoyed I have another vocab question. I know what Ethernet is and I'm fairly sure fiberchannel is basically some sort of fiber line. What is Ether channel? And where is it commonly used. Any one have a good link? Thanks, Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64900t=64900 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Security News Groups [7:64907]
Hello all, I saw a post a little bit ago about security news groups. I'll ask again because I also have been looking for one. Any one know of a good security news group? If so please share. Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64907t=64907 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
??? 2 Default Gateways ??? [7:64913]
Hello all I was just wondering if you could have 2 Default gateways, using static routes? If so what would you do just enter the ip default route command twice? Also will the router auto detect if one of those routes goes down and pass traffic only to the active interface. I know you can do load balancing with routing protocols, but it seems to me that if you were on a stub, why would you want to run a routing protocol? I'm interested in this because of a post a while back. Any info would be helpful. Thanks, Steven Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64913t=64913 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
EtherChannel - WOW Thats great [7:64940]
That's for all the info on Ether channel. What a wonderful idea. Is Ether channel hard to set up? I don't have the 100 Mb routers to try this at home or even 2 100Mbs switches. Does any one have a sample config file form a router or switch that uses it? Thanks again all you are all great ( especially those who answer my questions! ) Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64940t=64940 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
??? collapsed backbone ??? [7:64467]
Hello all, in a recent post I saw the term collapsed backbone. I know that the network backbone is usually a high speed connection that a server farm sits on, and could even extend out to your IFD's. However I'm fuzzy on the term collapsed backbone. What dose this imply. Thank you all, Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64467t=64467 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OSPF attempting to form adjacencies with non-DR/BDR [7:64468]
Kelly, I'm going to take a stab at this because I JUST started working with OSPF in my lab at home. However, in the Cisco doc.s they were saying it's good practice to set your priority level to zero. Actually here is the paragraph. OSPF routers all have the same priority value by default: 1. You can assign a priority from 0 to 255 on any given OSPF interface. A priority of 0 prevents the router from winning any election on that interface. A priority of 255 ensures at least a tie. The Router ID field is used to break ties; if two routers have the same priority, the router with the highest ID will be selected. You can manipulate the router ID by configuring an address on a loopback interface, although that is not the preferred way to control the DR/BDR election process. The priority value should be used instead because each interface can have its own unique priority value. You can easily configure a router to win an election on one interface, and lose an election on another. This is from the Cisco Semester 5 Networking academy. I hope it helps. Also the info was saying if you wanted to make one router always be the DR to set the loopback address a very high ip address. This ensures that as long as the router is up the loopback with the highest address will always be the DR. Just a request for all who read this. Please let me know if this is correct. As I stated I'm just starting on OSPF and would love feed back to see if I am understanding this correctly. Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64468t=64468 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Multiple WAN Connections to a Network [7:64469]
Terry, I'm not totally sure what you are doing with your setup. Are you web hosting and you have the 2 connections up for fault tolerance? or some other reason. Unless I am mistaken is you are running between to AS's on the net you need to use BGP. ( Please all correct me if I'm wrong, I'm still a lowly CCNA ) But I know that when we had our Qwest line installed they asked us if we had another service provider for this reason. Also if you are a stub network why not use default routes? Like I said it's hard to say for sure with out knowing what your doing. That's just what occurred to me. Hope it helps. Again please to all in the group correct me if I am mistaken, I'm more than happy to be corrected if it means I have a greater understanding of the subject. Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64471t=64469 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
OSPF into RIP redistribution [7:64502]
First I'm sorry if this has been asked before, but I'm just looking for a general overview and maybe a few good links. I've been told that there are some issues with RIP and OSPF redistribution. If so what are they and why. Thanks, Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64502t=64502 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Cisco 2501 DC Power adaptors ? [7:64300]
I just had this prob. I got a router for my home lab that had DC power. Actually I just swapped an AC power supply from the same series router that I had into the one I wanted to use and it works just fine. Hope that helps, also I'm sure you can find them on e-bay. Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64344t=64300 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
routername(boot) ??? [7:64188]
I have recently received some routers for a home lab. When I boot one it displays the following. routername(boot) what is this (boot) mean and how do I get ride of it? I've worked on routers before and never seen this. Thanks in advance. Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=64188t=64188 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
??? IS-IS ??? [7:63875]
Hello All, I'm wondering was IS-IS is. No pun intended. I'm assuming it's a routing protocol? I've gone through Cisco, CCNA acad. and have my CCNA and I've even started going over Semester 5 for the CCNP, but IS-IS is no where to be found... Is this a new protocol? Or does someone know where I can find a good over view? Thanks for brain food, Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=63875t=63875 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Wildcard Masking on the BSIN Exam [7:63887]
Any one know if they cover wild card masking in depth on the BSIN Exam? Thanks, Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=63887t=63887 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
The CCNP BSIN ( I Think Exam ) [7:63749]
I have been readibng through the boards and from what I've seen the new CCNP Routing exam seems to be a bear. This is the next test I am studying for. Any one out there that have passed the test, that can give me a generally study out line? Also what books or test prep did you use. You guys ( and ladies ) are all great, Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=63749t=63749 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Telnet Hole [7:63627]
I was told that there was a telnet security hole in Cisco's IOS. I was told there was a way where you could specify a level to telnet into and doing so could over ride passwords set on the VTY term. Does any one know if this is true? Second has it been patched in IOS 12.x? and lastly how is this attack performed Thank you, Steven Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=63627t=63627 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Where to Start for CCNP [7:63630]
I recently passed my CCNA, and I am interested in starting on my CCNP. I am taking classes at a local college that offers 10 week classes based around each of the 4 tests. Basically the CCNP path lasts 40 weeks. I start in the fall and I wanted to get a jump start on my learning as I have been told the skill level between the 2 certs is great. I have a few low end routers as home, and 1 5000 switch. Can any one point me in the right direction as far where I should start? Should I just buy a book on OSPF or BGP for the routing section? Or is there a better way. Thanks all, Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=63630t=63630 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Telnet Hole [7:63627]
Larry, Thank you for your reply, however what I was speaking of did not involve SSL. I know this may seem strange I know I am not mistaking. I checked with my Cisco instructor and he also remembered the exploit. The instructor even verified the passwords and config on the router. I am assuming he knows what he is doing because he is certified by Cisco to teach. He however could not recall how to preform the attack. This attack involed straight Telnet. I know in our labs at school we use IOS 11.2, and the attack was successful. Any one else know of this? Thank you, Steve Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=63635t=63627 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Route Summarization [7:62347]
Hello All, I have a question about route summarization. I was reading over the material from Cisco on the matter, I was wondering; or actually assuming. If you want to have route summarization in place to you need continuos network numbers? I know that the docs. said you would send a network address upstream that would reflect the bit that are common to all networks thus decreasing the size of the routing tables which is great. But what if someone else owned a network block on the net that was randomly missing from your group? Again, I can only assume that you must have all continuous networks. Is this correct, or am I missing something? Thank you all, Steven Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=62347t=62347 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
