RE: ATM circuit [7:28774]
Priscilla, I have to agree with you on this. I know of no method to carry ATM over an Ethernet. The opposite of course, is true. If the author would have said that ATM can run over chicken wire, I would find that much more believeable. ATM can run over nearly any phyiscal media. BTW - Do you encounter service providers at all? A Tranparent LAN (TLAN) is quite a popular term with them. Just a bridged 1483 PVC. Until I worked with that sector, never heard of it. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=28777&t=28774 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: ATM circuit [7:28774]
Priscilla, There was something called the "Cell in Frame Alliance" that was developing ATM over Ethernet but I don't know whatever came of it. Brian Dennis, CCIE #2210 (R&S)(ISP/Dial) CCSI #98640 5G Networks, Inc. [EMAIL PROTECTED] ""Priscilla Oppenheimer"" wrote: > 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 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=28791&t=28774 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: ATM circuit [7:28774]
Not at all. Unless some company or either the ATM-Forum or the IEEE "develop" standards that allow the ATM/G-Ethernet interworking function. It is my understanding that the only other Layer 2 technology that has interworking functions compliant with ATM is Frame Relay, they are defined in the FRF.5 and FRF.8 documents available at the Frame Relay Forum. Hth, Angel Leiva - MCSE, CCNA, CCNP-WAN -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Priscilla Oppenheimer Sent: Monday, December 10, 2001 6:46 PM To: [EMAIL PROTECTED] Subject: ATM circuit [7:28774] 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 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=28798&t=28774 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: ATM circuit [7:28774]
>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?? This is one of those protocol questions that at first makes me think of Bill Clinton expounding on the definition of "is," but more appropriately, Butler Lampson's observation that "no problem in computer science is insoluble with a sufficient level of indirection." Zeroth, it's not clear what the speed of the ATM VC is, which would influence the technologies that could be used. First, if the statement had referred to 10 Gigabit Ethernet fiber, I could argue that that is simply the same physical medium dependent layer that underlies OC-192 SONET as well as 10 GE. Second, is GMPLS involved? I'm almost certain there is an encapsulation for cells. Third, if there were segmentation, reassembly, and resegmentation, would the customer ever know? Fourth, there may be conversions anyway. By the statement "begin on an OC-3 fiber link," I wouldn't interpret that as raw OC-3 over fiber, but, since it's described as subsequently traversing a T3 line, then is there SONET encapsulating one DS-3 or slower signal within the OC-3? > >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 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=28799&t=28774 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: ATM circuit [7:28774]
What is the new book? Philip Jache Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=28801&t=28774 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: ATM circuit [7:28774]
Not ours Dave Priscilla Oppenheimer wrote: > > 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 -- David Madland Sr. Network Engineer CCIE# 2016 Qwest Communications Int. Inc. [EMAIL PROTECTED] 612-664-3367 "Emotion should reflect reason not guide it" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=28829&t=28774 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: ATM circuit [7:28774]
We provide a similiar service, labled LSS, LAN switching service. Customer gets either a 10 or 100M connection which we carry over DS3 or OC3 ATM. At the customer prem the router is actually a bridge or if you will, transparent LAN. Dave Gregg Malcolm wrote: > > Priscilla, > > I have to agree with you on this. I know of no method to carry ATM over an > Ethernet. The opposite of course, is true. If the author would have said > that ATM can run over chicken wire, I would find that much more > believeable. ATM can run over nearly any phyiscal media. > > BTW - Do you encounter service providers at all? A Tranparent LAN (TLAN) is > quite a popular term with them. Just a bridged 1483 PVC. Until I worked > with that sector, never heard of it. -- David Madland Sr. Network Engineer CCIE# 2016 Qwest Communications Int. Inc. [EMAIL PROTECTED] 612-664-3367 "Emotion should reflect reason not guide it" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=28831&t=28774 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: ATM circuit [7:28774]
pris , i am going to answer to the statement itself... i am not going to say weather it is possible (becuase i don`t know) but the passage reads to me like this an ATM VC can run over any medium becuase it`s a VC..it may leave your HQ on ATM but int the Service provider`s backbone it could run on anything...DS3 t3 MPLS etc.etc.) this is the message he seems to be trying to get across...and prehaps a re-wording is in order???. my SP (BT)has said that they DONT run atm over ethernet either steve "not meaning to offend ,just trying to help" skinner >From: "Priscilla Oppenheimer" >Reply-To: "Priscilla Oppenheimer" >To: [EMAIL PROTECTED] >Subject: ATM circuit [7:28774] >Date: Mon, 10 Dec 2001 19:46:28 -0500 > >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 _ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=28839&t=28774 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
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: ATM circuit [7:28774]
I found the presentation on Service Provider QoS you mention. It's very interesting. Thanks and thanks to everyone who answered. At 06:26 PM 12/12/01, Peter Whittle wrote: >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 Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=29016&t=28774 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: ATM circuit [7:28774] [7:28774]
On May 2, 2:22pm, "Priscilla Oppenheimer" wrote: } } My co-author added this statement to the book I'm working on: Your first book was great. Now that you've let the cat out of the bag, you have give us the details on the new one (what's it about, when will it be released, who is the co-author, etc.). }-- End of excerpt from "Priscilla Oppenheimer" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=28955&t=28774 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
