IGP's in ISP [7:38614]

2002-03-17 Thread Steven A. Ridder
Hey guys and gals, I have never worked in an ISP, so I have no idea how they run. I'm just curious, do they run an IGP in addition to IBGP and is it fully synchronized? I'm just curious to see how it's done in the real world. -- RFC 1149 Compliant. Get in my head: http://sar.dynu.com Mess

Re: IGP's in ISP [7:38614]

2002-03-17 Thread Peter van Oene
ISP's typically run one of IS-IS, or OSPF as their IGP's and manage only link and loopback address space within it. IBGP is always fully meshed, although most use tools like Route Reflection and Confederations to avoid the n*(n-1)/2 scaling issues IBGP can present. Synchronization is an ant

Re: IGP's in ISP [7:38614]

2002-03-17 Thread nrf
Well now, wouldn't that be interesting - an ISP that didn't run an IGP Hmmm. In fact, no less an authority than Radia Perlman has touted the merits of a single unified routing protocol that could be used for both intra- and inter-domain routing. For those who don't know who she is, Ms.

Re: IGP's in ISP [7:38614]

2002-03-17 Thread Peter van Oene
Really should read my own posts before I send them sometimes. I meant to say one of either maximize convergence speed, or minimize convergence time, but really said neither :) At 08:34 PM 3/17/2002 -0500, Peter van Oene wrote: >ISP's typically run one of IS-IS, or OSPF as their IGP's and mana

RE: IGP's in ISP [7:38614]

2002-03-18 Thread Jeffrey Reed
er van Oene Sent: Sunday, March 17, 2002 8:35 PM To: [EMAIL PROTECTED] Subject: Re: IGP's in ISP [7:38614] ISP's typically run one of IS-IS, or OSPF as their IGP's and manage only link and loopback address space within it. IBGP is always fully meshed, although most use tools like Route

RE: IGP's in ISP [7:38614]

2002-03-18 Thread Ladrach, Daniel E.
On our backbone we use Juniper routers. Also, we do not run OSPF either. Daniel Ladrach CCNA, CCNP WorldCom -Original Message- From: Jeffrey Reed [mailto:[EMAIL PROTECTED]] Sent: Monday, March 18, 2002 7:22 AM To: [EMAIL PROTECTED] Subject: RE: IGP's in ISP [7:38614] Is it a

Re: IGP's in ISP [7:38614]

2002-03-18 Thread Steven A. Ridder
aniel Ladrach > CCNA, CCNP > WorldCom > > > -Original Message- > From: Jeffrey Reed [mailto:[EMAIL PROTECTED]] > Sent: Monday, March 18, 2002 7:22 AM > To: [EMAIL PROTECTED] > Subject: RE: IGP's in ISP [7:38614] > > > Is it a good assumption that most ISP's

RE: IGP's in ISP [7:38614]

2002-03-18 Thread Robert Fowler
entire network redesign. I think Ci$co wouldn't mind that to much though. :) Robert -Original Message- From: Jeffrey Reed [mailto:[EMAIL PROTECTED]] Sent: Monday, March 18, 2002 7:22 AM To: [EMAIL PROTECTED] Subject: RE: IGP's in ISP [7:38614] Is it a good assumption that most

RE: IGP's in ISP [7:38614]

2002-03-18 Thread Peter van Oene
ess memory, less CPU etc. If this is correct, why >don't ISPs run that as their interior routing protocol? > >Jeffrey Reed >Classic Networking, Inc. > >-Original Message- >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Peter >van Oene >Sent: Sund

RE: IGP's in ISP [7:38614]

2002-03-18 Thread Ladrach, Daniel E.
ISIS Daniel Ladrach CCNA, CCNP WorldCom -Original Message- From: Steven A. Ridder [mailto:[EMAIL PROTECTED]] Sent: Monday, March 18, 2002 9:07 AM To: [EMAIL PROTECTED] Subject: Re: IGP's in ISP [7:38614] Do you have an IGP? -- RFC 1149 Compliant. Get in my head: http://sar.dyn

Re: IGP's in ISP [7:38614]

2002-03-18 Thread MADMAN
--- > From: Jeffrey Reed [mailto:[EMAIL PROTECTED]] > Sent: Monday, March 18, 2002 7:22 AM > To: [EMAIL PROTECTED] > Subject: RE: IGP's in ISP [7:38614] > > Is it a good assumption that most ISP's, big & small run Cisco routers in > their core networks? If so, why don&#x

RE: IGP's in ISP [7:38614]

2002-03-18 Thread [EMAIL PROTECTED]
When I used to work at UUNET (now Worldcom) they used ISIS as their IGP. Here at BT, OSPF is used. -Original Message- From: Ladrach, Daniel E. [mailto:[EMAIL PROTECTED]] Sent: Monday, March 18, 2002 14:00 To: [EMAIL PROTECTED] Subject: RE: IGP's in ISP [7:38614] On our backbone w

Re: IGP's in ISP [7:38614]

2002-03-18 Thread nrf
etc. If this is correct, > why > > don't ISPs run that as their interior routing protocol? > > > > Jeffrey Reed > > Classic Networking, Inc. > > > > -Original Message- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of > Pet

Re: IGP's in ISP [7:38614]

2002-03-18 Thread nrf
t;Cisco router than OSPF... less memory, less CPU etc. If this is correct, why > >don't ISPs run that as their interior routing protocol? > > > >Jeffrey Reed > >Classic Networking, Inc. > > > >-Original Message- > >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTEC

Re: IGP's in ISP [7:38614]

2002-03-18 Thread nrf
t; > Jeffrey Reed > Classic Networking, Inc. > > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Peter > van Oene > Sent: Sunday, March 17, 2002 8:35 PM > To: [EMAIL PROTECTED] > Subject: Re: IGP's in ISP [7:38614] > > I

Re: IGP's in ISP [7:38614]

2002-03-18 Thread Peter van Oene
MAIL PROTECTED]... > > On our backbone we use Juniper routers. Also, we do not run OSPF either. > > > > Daniel Ladrach > > CCNA, CCNP > > WorldCom > > > > > > -Original Message- > > From: Jeffrey Reed [mailto:[EMAIL PROTECTED]] > >