nanog mailing list archives
Re: Internet Backbone Index
From: smd () clock org (Sean M. Doran)
Date: 14 Jul 1997 12:28:52 -0400
Stephen Balbach <stephen () clark net> writes:
Routes the first packets and switches the rest based on "flows".
How is this conceptually different from cisco fastswitching wherein the slow path is used for the first packet towards a destination and all subsequent packets use a cache-based fast path? In both cases you have a slow cache-set-up path and a finite cache. There are significant disadvantages to using a cache in core routers (look up Dennis Ferguson's comments in your local NANOG archive, nobody I can think of can improve on them). The only principal advantage to cache-based routing is when you haven't got the power to process all packets through the same path without drops or mishandling of things like options and filters, but you do have the power to do some sort of hashed cache lookup. With luck, this will not be the case in future routers. Sean.
Current thread:
- Re: Internet Backbone Index, (continued)
- Re: Internet Backbone Index Dorian R. Kim (Jul 13)
- Re: Internet Backbone Index Dorian R. Kim (Jul 13)
- Re: Internet Backbone Index Randy Bush (Jul 13)
- Re: Internet Backbone Index Alex.Bligh (Jul 13)
- Re: Internet Backbone Index Stephen Balbach (Jul 13)
- Re: Internet Backbone Index Dorian R. Kim (Jul 13)
- Re: Internet Backbone Index Stephen Balbach (Jul 13)
- Re: Internet Backbone Index Dorian R. Kim (Jul 13)
- Benefits of switching at L2 Alan Hannan (Jul 13)
- Re: Benefits of switching at L2 Dorian R. Kim (Jul 13)
- Re: Internet Backbone Index Sean M. Doran (Jul 14)
- Re: Internet Backbone Index Dorian R. Kim (Jul 13)
- Message not available
- Re: Internet Backbone Index Jay R. Ashworth (Jul 13)
- Re: Internet Backbone Index Randy Bush (Jul 13)