From ddd1c7cfb9391ea30d1ab3a9060370ea560e151d Mon Sep 17 00:00:00 2001 From: Jana Babovakova Date: Fri, 9 May 2025 16:40:34 +0200 Subject: [PATCH] Docs: added information about difference in export table usage on v2/3. --- doc/migration-bird3.md | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/doc/migration-bird3.md b/doc/migration-bird3.md index 1a088d59f..6098c10fb 100644 --- a/doc/migration-bird3.md +++ b/doc/migration-bird3.md @@ -93,3 +93,7 @@ internal attribute, and when it is too high, the route is discarded. The export table now shows the state immediately before sending on the wire, thus without custom attributes and after all updates done by BGP. This should help with performance a little, while also being more accurate. + +When changing the export filter the export table is used in BIRD 3, but ignored in BIRD 2. +This means that BIRD 2 sends all routes again, regardless of having export table enabled. +BIRD 3 is smarter and uses the export table to filter out routes when export filter has changed. -- 2.47.2