Re: Has anybody seen IS-IS used anywhere but ISP's? [7:4784]
OSPF has more "enterprise" oriented features including more options for supporting varied network mediums (NBMA comes to mind) and definitely a marked advantage in published materials. Further, without recent modifications, the ability to scope the flow of LSA's and maintain some degree of routing optimality was better with OSPF which made it more suited to large enterprise networks where multi area topologies are the norm. Recent modifications to ISIS including the ability to "leak" routing information into L1 areas from the backbone allows ISIS to offer similar functionality - (think stub vs totally stubby in OSPF) I have personally not seen ISIS outside of already mentioned SDH management networks and ISP backbones and personally would not recommend running ISIS over OSPF in an enterprise network simply because it's easier and usually cheaper to find OSPF knowledge than ISIS. Peter *** REPLY SEPARATOR *** On 5/16/2001 at 11:42 PM nrf wrote: >Damn, I forgot about that whole Decnet thing. That's right, that's right, >Decnet implements Is-Is for PhaseV migration. I have even worked on a >network like that, how foolish of me to forget. > >So I guess I should have narrowed my question. What I should have said is, >has anybody seen Integrated IS-IS (for IP routing only) being used in a >real >working network other than an ISP? > > > > > >""Howard C. Berkowitz"" wrote in message >[EMAIL PROTECTED]">news:[EMAIL PROTECTED]... >> >Other than in ISP's, has anybody seen IS-IS in use in a real production >> >network? >> > >> A subset is used for SONET managment in telcos. I have also seen it >> used in some conversions from DECnet Phase IV to Phase V (which is >> OSI) in order to get dual OSI and IP routing. >> 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] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=4865&t=4784 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Has anybody seen IS-IS used anywhere but ISP's? [7:4784]
Very similar to Robert Nelsons comments. I have just designed and implemented an International "out of band" management network using IS-IS. This as Robert has already said is to use firstly and primarily manage the SDH equipment we have. I find it quite straight forward although I seem to be having problems when trying to summarize IP addresses which in turn then stop full CLNS connectivity. Maybe a posting later if I can't figure out what is going on! Cheers -Original Message- From: nrf [mailto:[EMAIL PROTECTED]] Sent: 17 May 2001 04:43 To: [EMAIL PROTECTED] Subject: Re: Has anybody seen IS-IS used anywhere but ISP's? [7:4784] Damn, I forgot about that whole Decnet thing. That's right, that's right, Decnet implements Is-Is for PhaseV migration. I have even worked on a network like that, how foolish of me to forget. So I guess I should have narrowed my question. What I should have said is, has anybody seen Integrated IS-IS (for IP routing only) being used in a real working network other than an ISP? ""Howard C. Berkowitz"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > >Other than in ISP's, has anybody seen IS-IS in use in a real production > >network? > > > A subset is used for SONET managment in telcos. I have also seen it > used in some conversions from DECnet Phase IV to Phase V (which is > OSI) in order to get dual OSI and IP routing. > 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] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=4819&t=4784 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Has anybody seen IS-IS used anywhere but ISP's? [7:4784]
> >Other than in ISP's, has anybody seen IS-IS in use in a real production >network? ISIS is used in most telcos, where a DCN is used for getting billing information back from the switches. The switches being standardised all talk X.25 over async, and ADMs all talk ISO, so ISIS is always the best option. Management traffic for the ADMs, and the Billing information normally travel over the same network, which should be provided out of band (AT&T, are you listening?) So, a telco running SDH (I know alcatel now support IP, not sure about the rest), should run ISIS. I Love ISIS, it's so easy to work with. Rob./ _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=4816&t=4784 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Has anybody seen IS-IS used anywhere but ISP's? [7:4784]
Yes! ""nrf"" Damn, I forgot about that whole Decnet thing. That's right, that's right, > Decnet implements Is-Is for PhaseV migration. I have even worked on a > network like that, how foolish of me to forget. > > So I guess I should have narrowed my question. What I should have said is, > has anybody seen Integrated IS-IS (for IP routing only) being used in a real > working network other than an ISP? > > > > > > ""Howard C. Berkowitz"" wrote in message > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > >Other than in ISP's, has anybody seen IS-IS in use in a real production > > >network? > > > > > A subset is used for SONET managment in telcos. I have also seen it > > used in some conversions from DECnet Phase IV to Phase V (which is > > OSI) in order to get dual OSI and IP routing. > > 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] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=4800&t=4784 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Has anybody seen IS-IS used anywhere but ISP's? [7:4784]
Damn, I forgot about that whole Decnet thing. That's right, that's right, Decnet implements Is-Is for PhaseV migration. I have even worked on a network like that, how foolish of me to forget. So I guess I should have narrowed my question. What I should have said is, has anybody seen Integrated IS-IS (for IP routing only) being used in a real working network other than an ISP? ""Howard C. Berkowitz"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > >Other than in ISP's, has anybody seen IS-IS in use in a real production > >network? > > > A subset is used for SONET managment in telcos. I have also seen it > used in some conversions from DECnet Phase IV to Phase V (which is > OSI) in order to get dual OSI and IP routing. > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=4796&t=4784 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Has anybody seen IS-IS used anywhere but ISP's? [7:4784]
>Other than in ISP's, has anybody seen IS-IS in use in a real production >network? > A subset is used for SONET managment in telcos. I have also seen it used in some conversions from DECnet Phase IV to Phase V (which is OSI) in order to get dual OSI and IP routing. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=4793&t=4784 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Has anybody seen IS-IS used anywhere but ISP's? [7:4784]
Other than in ISP's, has anybody seen IS-IS in use in a real production network? Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=4784&t=4784 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
