Hello, I'm running bird 1.6.x branch (packages from Debian/Buster; currently 1.6.6) on recent 4.19 custom-build kernels without any issues (on armhf hardware).
My BGP sessions are carrying only few routes (default + some more specifics). One idea that comes in my mind is default kernel limit for IPv6 routes in memory (sysctl net.ipv6.route.max_size); and such default is quite low for fullbgp/DFZ IPv6 deployments and it's still set to 4096 on Debian/Buster with stock kernels. Can people having issues with 4.19 kernels check sysctl mentioned above? - Daniel On 11/21/19 6:12 PM, Ondrej Zajicek wrote: > On Thu, Nov 21, 2019 at 04:09:24PM +0000, Andrew Hearn wrote: >>> Without traffic through the box (all IPv6 prefixes filtered) the bgp >>> sessions is stable. With traffic the bgp session dies after some time >>> and ssh connections in the default table freezes. >>> >>> I did some packet captures and saw tcp retransmissions before hold timer >>> expires. >>> >>> Kernel 4.14.127 is here stable, too. Sadly I have no time for a kernel >>> bisect until September. (And no glue where to start and how to trigger >>> the bug faster.) >> >> Sorry to bring up a fairly old thread... >> >> We believe we are seeing this problem too, since a Stretch->Buster >> upgrade - was there a solution to this? > > Perhaps try kernel 5.2.x or 5.3.x from buster-backports? >
