On Mon, Jan 25, 2010 at 05:19:09PM +0800, Affandi INDRAJI wrote:
Hi Ondrej,
Thanks for prompt reply.
A couple of question:
1. How to configure based on match AS for example in cisco, they have regular expression like _7898$, what is the equivalent of this command in BIRD config file (do you use the same regular expression syntax)?
You can use generalized pattern matching expressions like: bgp_path ~ [= * 1234 * =] (that matches any path containing 1234, see [1] section bgpmask for details). or faster first/last expressions like: bgp_path.first = 1234 bgp_path.last = 1234 that checks first/last ASN in the AS path. These expressions can be used in import/export filters (in 'if' expressions) and can be also used in 'show route' commands to filter routes to show: show route where bgp_path ~ [= * 1234 * =] [1] http://bird.network.cz/?get_doc&f=bird-5.html
2. I managed to set the community to let say 1000:1234, how to put it in the filter to match this community (let say, we want to advertise to certain peer only the routes that match community 1000:1234)
The expression is: (1000,1234) ~ bgp_community -- Elen sila lumenn' omentielvo Ondrej 'SanTiago' Zajicek (email: santiago@crfreenet.org) OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net) "To err is human -- to blame it on a computer is even more so."