Hi, That is exactly what "filter" function does. Something like this: bgp_community.filter([(64511,*)]);
On Wed, Jul 19, 2023, 17:15 Marek Küthe <m-k-mailling-l...@mk16.de> wrote: > Hello, > > I recently discovered a new filter for myself on > https://bgpfilterguide.nlnog.net/guides/many_communities/#bird. In my > eyes it also makes sense to keep the routing table as small as > possible. But now I don't want to delete all communities, but keep a > single one. How can I implement something like that? > ``` > function strip_too_many_communities() { > if ( ( bgp_community.len + bgp_ext_community.len + > bgp_large_community.len ) >= 100 ) then { > bgp_community.empty.except((64511, *)); > bgp_ext_community.empty; > bgp_large_community.empty; > } > } > ``` > > The background is that these serve in the > [dn42](https://dn42.dev/howto/Bird-communities) as information, how > good the connection to the destination is. Therefore I would like to > keep these. > Does anyone have any ideas on how to do something like this? > > Greetings > Marek Küthe > > -- > Marek Küthe > m...@mk16.de > er/ihm he/him >
