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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Confussion over multi-homing
On Thu, 14 Sep 2000, David Lott wrote: > ISP. I also understand that there are filters at the /20 boundaries in > order to minimize the size of the routing table. This depends on who's filters you're talking about. I suspect most smaller ISPs filter at the /24 boundry if at all on their transit or peering links. It's the bigger NSPs you have to worry about. You can find some (ok...not very much really) info on this on the www.nanog.org site. Verio has a reputation for having one of the stricter filter policies, and even they accept /24 and shorter in large portions of traditional C space (ARIN has allocated /20's and larger blocks from this space)...meaning depending on what portion of 0/0 your space is in, you may get lucky and be able to be seen as blocks as small as /24. IIRC, some of the blocks ARIN is now allocating from are in the "you're screwed" ranges where Verio filters on /20 and shorter...so if you get space from an ISP that recently got space in that range, you're screwed. ---------------------------------------------------------------------- Jon Lewis *[email protected]*| I route System Administrator | therefore you are Atlantic Net | _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
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