Re: Limit of numbers of BGP communities

On 12 Jul 2024, at 04:30, Ponikierski, Grzegorz via Bird-users <bird-users@network.cz> wrote:

Hello all! How many standard communities, extended communities and large communities, user can apply on a route using Bird? BGP UPDATE message has finite size so I guess that there must be a limit somewhere.

The limit is that ISPs are limiting it to a 100: https://bgpfilterguide.nlnog.net/guides/many_communities/ Above that, it will be emptied completely in many networks. Greets, Jeroen