Kevin B <t...@teslahost.net> writes: > Hello, > > I have 2 upstream transit providers and 1 downstream customer we provide > transit to - http://paste.debian.net/1086030/ (full Bird configuration > with explanation) > > There is a problem: Bird is exporting all the imported prefixes from my > upstreams back to them. For example 10.40.40.0/24 is being exported from > us even when AS20's customer doesn't announce it, because it is > announced somewhere else in the full table and we just export it back > from the full view. > > Here is `birdc show protocols all` output - http://paste.debian.net/1086033/ > > I would like to prevent exporting the full view tables imported from my > upstreams back to them, can you help me to understand what is wrong with > the configuration and why does it happen?
Because you are telling Bird (with that filter) to export any net in that prefix? I.e., if net ~ [ 10.40.40.0/24 ] then return true; doesn't care where that route is coming from. If you want to control where announcements come from, you can do that in the filter. E.g., if proto != "DOWNSTREAM1v4" then return false; -Toke
