20 February 2003


I am attending IPS2003
Inter-domain Performance & Simulation (In ternational Workshop) Salzburg, 20th-21st Feb 2003. Starting off there is an excellent detailed discussion of the Border Gateway Protocol (BGP-4) presented by Pedro A. Aranda Guiti駻rez (Telefonica Spain). BGP is used to route IP (Internet Protocol) between so-called Autonymous Systems (AS), i.e. networks each controlled by one set of administrators. The rest of the IPS2003 workshop is made up of a single stream of sessions looking mostly at low level IP-related network and Quality of Services (QoS) issues.

The full papers presented at this workshop will all be available on the workshop website shortly. The TSSG's main interest in this area is driven by our link with Salzburg Research who we work with on the EU IST project Intermon, and by work we have done on the EU IST project Torrent.

There are some cross-overs between this activity and the IPv6 Cluster. In particular, the complex routing rule sets, which keep growing, required by BGP to route IPv4 (over 160,000 network entries in many US BGP nodes, and approx 34 Meg to hold the routing table c.f. Looking Glass, see the extended entry below for a sample result) is one of the strongest arguments for moving to IPv6.

I queried one of the sites listed in Looking Glass 20030220 @ 11:40 CET and received the following results showing nearly 170,000 network entries:

MAE-East Looking Glass Results

Query: summary

BGP router identifier, local AS number 2548
BGP table version is 48722885, main routing table version 48722885
169888 network entries and 501968 paths using 39415168 bytes of memory
34280 BGP path attribute entries using 1919736 bytes of memory
1302 BGP rrinfo entries using 38384 bytes of memory
25261 BGP AS-PATH entries using 635252 bytes of memory
222 BGP community entries using 6064 bytes of memory
25113 BGP route-map cache entries using 401808 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memory
Dampening enabled. 112 history paths, 4 dampened paths
BGP activity 3804110/90197066 prefixes, 46234586/45732081 paths, scan interval 60 secs
Posted by mofoghlu at February 20, 2003 10:47 AM | TrackBack