Question about MPLS L3VPN

[Ondrej Zajicek]

On Sat, Jan 27, 2024 at 02:59:57PM +0100, Ondrej Zajicek wrote:
> 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.
>
> ... and i just noticed that the bug manifests even in my test case, so
> i will check it.

Fixed:

https://gitlab.nic.cz/labs/bird/-/commit/f40e2bc270d3635be518ae80251ce0b5c519c6f4

You can try attached patch.

-- 
Elen sila lumenn' omentielvo

Ondrej 'Santiago' Zajicek (email: santiago at crfreenet.org)
"To err is human -- to blame it on a computer is even more so."
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