On Sat, Jan 27, 2024 at 01:42:57PM +0100, Marcel Menzel via Bird-users wrote: > Hello List, > > I am doing a test setup with the new MPLS L3VPN feature (for background > information: I am running IPsec with L2TP on top, with OSPF as IGP and iBGP > between loopbacks) > with one router receiving an IPv6 fulltable via eBGP and the other one > establishing the BGP session through a tunnel described above, and I noticed > periodic high CPU usage on the router receiving the routes at the end of the > tunnel. > > It seems, that BIRD keeps exporting the whole table to the kernel every 30 > seconds, as it is configured in the kernel protocol scan time with the "vrf" > directive set:
Hello It is possible that BIRD exports some route but receives back from kernel something slightly different than it expected, so it will try to re-send it during the scan. If you enable 'debug all' on the kernel protocol (both global and in VRF), you can see: 2024-01-27 14:53:50.313 <TRACE> kernel1v6: 2001:db8:1:2::/64: seen or: 2024-01-27 14:53:50.313 <TRACE> kernel2v6: 2001:db8:1:2::/64: updating ... and i just noticed that the bug manifests even in my test case, so i will check it. -- Elen sila lumenn' omentielvo Ondrej 'Santiago' Zajicek (email: santi...@crfreenet.org) "To err is human -- to blame it on a computer is even more so."
