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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: And Now for Something Completely Different (was Re: IPv6 news)
man, 17,.10.2005 kl. 07.25 -0700, skrev Fred Baker: > is that anything like using, in Cisco terms, a "fast-switching cache" > vs a "FIB"? I'll bite as I wrote the paragraph you're quoting; Actually, hanging on to the old concepts may be more confusing than trying to look at it in completely new ways. Imagine a situation with no access to any means of direct communication (phone etc). You've got a message to deliver to some person, and have no idea where to find that person. Chances are there's a group of people nearby you can ask. They may know how to find the one you're looking for. If not they may know others they can ask on your behalf. Several iterations later the person is located and you've established a path through which you can pass the information you wanted. Translated into cisco terms this mean that the FIB is just a partial routing database, enough to start the search and otherwise handle communications in the neighborhood (no more than X router-hops, maybe AS-hops away). When the destination is located you keep that information for a while in case there are more packets going to the same place, similar to what you do with traditional route-cache. > > On Oct 17, 2005, at 6:47 AM, Mikael Abrahamsson wrote: > >> Well, let's try to turn the problem on its head and see if thats > >> clearer; Imagine an internet where only your closest neighbors > >> know you exist. The rest of the internet knows nothing about you, > >> except there are mechanisms that let them "track you down" when > >> necessary. That is very different from today's full-routing-table.
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