It depends of the service provider etc. When we add new customer with his own AS and network, we (here) must: - add his AS into our AS MACRO in RIPE data base, because a dozen providers here and in Europe, just as (for example) MCI in USA use this (and RADB) data base for the AS-based filtering; - send this AS to some our peers and upstream provider because they build AS-based filetsr manually (through it tends to the RIPE or RADB usage instead) - send the PREFIX (not AS) to some providers because they use prefix-based filtering (at least UUnet does so). (all this except (1) is doing by the programs, of course - we update RIPE and generate everything from the RIPE). I (personally) am thinking AS-based filtering is useless and it's safer to do PREFIX-based filtering instead, just with the COMMUNITY-based route control. RELCOM does both PREFIX (always except upstream links) and AS (sometimes) filtering. This means _it's highly recommended to keep your network objects in the registry data bases in order_. But it depends from the topology. Alex. On Sat, 16 Oct 1999, James Smith wrote:
Date: Sat, 16 Oct 1999 10:43:25 -0400 (EDT) From: James Smith <jsmith@dxstorm.com> To: nanog@merit.edu
I know a lot of networks do BGP filter. Is there any way to make sure that a particular AS doesn't get filtered, such as listing with RADB or ARIN's routing registry? I'm not sure how many networks actually use these registries for their router configuration, so I don't know whether it would be worth while to register or not.
-- James Smith, CCNA Network/Systems Administrator DXSTORM.COM
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