On Tue, Sep 18, 2007 at 12:25:02PM -0500, [EMAIL PROTECTED] wrote: > I saw from a thread a while back that putting as-path regular > expression support into OpenBGPd was being considered. I'm testing > out a 4.2 snapshot, and so far it doesn't seem to be there just yet. > > For various reasons, I'd like to be able to tweak prefixes based on > some specific as-path values a la Juniper. This kind of stuff: > > Criteria: Path whose second AS number must be 56 or 78. > Regular Expression: (. 56) | (. 78) or . (56|78) > Example Matches: 1234 56 and/or 34 78 > > http://www.juniper.net/techpubs/software/junos/junos74/swconfig74-policy/html/policy-extend-match-config3.html > > Anyone know if this is in the works? >
Adding a better AS filter list is on my todo list since a long time. We will not implement a full regex -- cisco demonstrated once again why regex is a bad idea. Just a few thoughts. I do not like the | (or) operator. This can be written with two rules without any issues. I guess we will support +, ., - , ^ and $. -- :wq Claudio
