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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: IGPs in use
[email protected] (Jerry Scharf) writes: > One thing about IS-IS that is quite different from OSPF and all the other > IGPs is that the neighbor traffic is not in IP but instead is done at > layer 2. Some say this is a good thing. I have never run into a case > where I couldn't get it to do what I wanted, but always suspected there > would be. Would this force ATM links to move to the less efficient SNAP > based encoding (if so, there's 4% of your bandwidth)? Yes, however, let's be accurate here: the problem is NOT that IS-IS runs over the link layer. The problem is that it doesn't run over IP. Even if it ran over another network layer protocol, you'd still require an additional demux layer. One might point out that SNAP is perhaps not the most efficient of all encapsulations anyhow. Nor is ATM. Tony
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