IPv6 BGP & kernel 4.19
Alarig Le Lay
alarig at swordarmor.fr
Wed Jun 19 20:09:32 CEST 2019
On mer. 19 juin 09:10:53 2019, Robert Sander wrote:
> our routers run on Debian stretch with bird 1.6.4 from
> Yesterday I tried kernel 4.19 from backports.debian.org and ran into a
> weird issue with IPv6 BGP sessions:
> All Peerings reported "Error: Hold timer expired" ca. every 40 minutes.
> IPv6 forwarding was flapping all the time.
> After rebooting into kernel 4.9 everything worked again.
> IPv4 BGP was not affected and also OSPF (v4 and v6). I could disable all
> IPv6 BGP peerings on this router and then it forwarded to another router
> learned via OSPF for IPv6 without issues.
> Has anyone seen such a behaviour?
I’ve seen this with 4.19 on gentoo. For now I’m still running 4.14.
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