On Thu, 30 May 2002 09:48:50 -0400 Valdis.Kletnieks@vt.edu wrote:
On Thu, 30 May 2002 09:20:17 EDT, Leo Bicknell <bicknell@ufp.org> said:
Since you have to connect to two or more providers to get an ASN, and since the whole reason to have an ASN is to inject things into the DFZ it doesn't seem like it would increase routing table size by a huge amount. It would eliminate one whole paperwork/justification step (for your first address allocation). For subsequent allocations there is an example (that /24) of how efficiently the ISP uses the space.
Unless I'm missing something, it will double the size of it, since that /24 out of that /8 won't aggregate with their other address space. (Hint - our AS has 198.82/16 and 128.173/16 and some other small blocks - how many routes do YOU see for us?)
Dear Valdis; If you mean AS 1312 VA-TECH-AS , we see 4 routes : * 63.164.28.0/22 160.81.38.225 9 0 1239 7066 1312 i * 166.61.8.89 0 145 11537 7066 1312 i * 157.130.46.53 300 701 1239 7066 1312 i *> 216.177.55.5 500 15076 1239 7066 1312 i * 128.173.0.0 157.130.46.53 300 701 1239 7066 1312 i * 166.61.8.89 0 145 11537 7066 1312 i *> 216.177.55.5 500 15076 1239 7066 1312 i * 160.81.38.225 9 0 1239 7066 1312 i * 192.70.187.0 157.130.46.53 300 701 1239 7066 1312 i * 166.61.8.89 0 145 11537 7066 1312 i *> 216.177.55.5 500 15076 1239 7066 1312 i * 160.81.38.225 9 0 1239 7066 1312 i * 198.82.0.0/16 157.130.46.53 300 701 1239 7066 1312 i * 166.61.8.89 0 145 11537 7066 1312 i *> 216.177.55.5 500 15076 1239 7066 1312 i * 160.81.38.225 9 0 1239 7066 1312 i If you mean AS 13546 VT-RICHMOND-AS, only one in BGP from AS 16517 : 208.16.73.0/24 In MBGP, we only see two of these routes. Two others are aggregated into Sprint address blocks : 63.164.28.0 208.16.73.0 while 192.70.187.0 does not appear at all and is not MBGP routable from us. Regards Marshall
Also, there's no real reason to think that address space usage in that bootstrap /24 will accurately reflect usage in a /20 allocated to them, since THAT /20 will probably be sub-allocated to users/customers. Heck, in our AS, the nameservers and mailservers and the like would probably fit into a /27 (maybe a /26), and wouldn't tell you anything about the /20 that covers Torgeson Hall.... -- Valdis Kletnieks Computer Systems Senior Engineer Virginia Tech