RE: [nsp] Advantages of IS-IS over OSPF

From: Sykes, Phil (Phil.Sykes@cweurope.net)
Date: Thu Sep 07 2000 - 03:12:10 EDT


Just to point out, that should be:

http://www.cisco.com/public/cons/workshops/

The relevant file is:

http://www.cisco.com/public/cons/workshops/Routing/3-Introduction_to_ISIS-1u
p.pdf

Cheers,

Phil Sykes, Network Engineer
Cable & Wireless Global Network
p: +49 89 92699 204 m: +49 172 89 79 727

> -----Original Message-----
> From: Barry Raveendran Greene [mailto:bgreene@cisco.com]
> Sent: 07 September 2000 07:49
> To: Steve Lilley; Cisco NSP List
> Subject: RE: [nsp] Advantages of IS-IS over OSPF
>
>
> Hi Steve,
>
> The most honest comparison I've seen has been Dave Katz's
> presentation at
> NANOG19:
>
> http://www.nanog.org/mtg-0006/katz.html
>
> As to IS-IS documentation, yes that is a weak point. We've
> got some new
> IS-IS presentations out on the ISP Workshop site, with more
> coming in the
> future.
>
> http://www.cisco.com/public/cons/workshop/
>
> Barry
>
>
>
> > -----Original Message-----
> > From: Steve Lilley [mailto:slilley@thrupoint.net]
> > Sent: Wednesday, September 06, 2000 7:58 PM
> > To: Cisco NSP List
> > Subject: [nsp] Advantages of IS-IS over OSPF
> >
> >
> > Is there some advantage that IS-IS offers over OSPF for ISP
> > backbones? I can't find anything documented...in fact, I can find
> > VERY little documentation on IS-IS. This is quite a contrast to
> > OSPF, where there is actually more information than I could ever
> > want! :-)
> >
> > >From what I can tell, the biggest advantage for IS-IS is the fact
> > that the backbone area is more flexible than OSPF's area 0. With
> > IS-IS's two-tiered approach, the backbone can "snake" around the
> > network easier than OSPF's area 0. Beyond that, I don't see many
> > advantages. Since IS-IS is multiprotocol by design, it may
> > initially support newer non-IPv4 protocols (i.e. multicast, IPv6,
> > etc.) before OSPF, but that won't be tolerated for long by the
> > huge number of OSPF customer's out there!
> >
> > As always, and feedback is appreciated!
> >
> > Regards,
> > Steve Lilley
> > ThruPoint
> >
> >
>



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