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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: NSPs and filters
On Sun, 13 Jul 1997, Vadim Antonov wrote: > randy> So, at POP X, I take in maybe 100 prefixes, with maybe 1000 > randy> at some POPs. How do I build and maintain that filter list, > > [email protected] (Alan Hannan) wrote: > > > The same way you build and maintain routing filter lists for the > > prefixes you take in. > > Bzzt. Routing filter lists are applied to routing updates. Packet > filter lists are applied to packets. > > Big difference. > > 1000-entry packet filter will slow any existing router down to crawl, > and practically all future boxes won't do any better. Vadim, I think Alan was talking about the mechanics of building such a list, not deploying them in particular. Given the information required to effectively filter cutomer routes, I'd suggest that one has enough information to create a packet filter list based on them. It's just matter of "simple" database work and automation. ;) -dorian
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