netdev - Re: IPv6 regression introduced by commit 3b6761d18bc11f2af2a6fc494e9026d39593f22c

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Date:   Mon, 09 Mar 2020 12:35:53 +0100
From:   Fabian Grünbichler <f.gruenbichler@...xmox.com>
To:     Alarig Le Lay <alarig@...rdarmor.fr>
Cc:     Vincent Bernat <bernat@...ian.org>,
        David Ahern <dsahern@...il.com>, jack@...ilfillan.uk,
        netdev@...r.kernel.org, t.lamprecht@...xmox.com
Subject: Re: IPv6 regression introduced by commit
 3b6761d18bc11f2af2a6fc494e9026d39593f22c

On March 9, 2020 11:47 am, Alarig Le Lay wrote:
> On lun.  9 mars 09:59:30 2020, Fabian Grünbichler wrote:
>> On March 9, 2020 3:15 am, David Ahern wrote:
>> > On 3/8/20 4:57 AM, Alarig Le Lay wrote:
>> >> On sam.  7 mars 17:52:10 2020, David Ahern wrote:
>> >> I have the problem with 5.3 (proxmox 6), so unless FIB handling has been
>> >> changed since then, I doubt that it will works, but I will try on
>> >> Monday.
>> >> 
>> > 
>> > a fair amount of changes went in through 5.4 including improvements to
>> > neighbor handling. 5.4 (I think) also had changes around dumping the
>> > route cache.
>> 
>> FWIW, there is a 5.4-based kernel preview package available in the 
>> pvetest repository for Proxmox VE 6.x:
>> 
>> http://download.proxmox.com/debian/pve/dists/buster/pvetest/binary-amd64/pve-kernel-5.4.22-1-pve_5.4.22-1_amd64.deb
> 
> Thanks for the kernel!
> 
> I’m still having some issues with 5.4:
> root@...3:~# ip -6 -ts monitor neigh | grep -P 'INCOMPLETE|FAILED'
> [2020-03-09T11:35:51.276329] 2a00:5884:0:6::2 dev vmbr12  router FAILED
> [2020-03-09T11:36:03.308359] fe80::5287:89ff:fef0:ce81 dev vmbr12  router FAILED
> [2020-03-09T11:36:21.996250] 2a00:5884:0:6::1 dev vmbr12  router FAILED
> [2020-03-09T11:36:32.524389] 2a00:5884:0:6::1 dev vmbr12  router FAILED
> [2020-03-09T11:36:34.800303] 2a00:5884:0:6::2 dev vmbr12  router FAILED
> [2020-03-09T11:36:36.588333] 2a00:5884:0:6::1 dev vmbr12  router FAILED
> [2020-03-09T11:36:41.196351] 2a00:5884:0:6::1 dev vmbr12  router FAILED
> 
> And BGP sessions are flapping as well:
> root@...3:~# birdc6 sh pr | grep bgp
> ibgp_asbr01_ipv6 BGP      master   up     11:40:28    Established
> ibgp_asbr02_ipv6 BGP      master   up     11:41:09    Established
> root@...3:~# ps -o lstart -p $(pgrep bird6)
>                  STARTED
> Mon Mar  9 11:14:44 2020
> 
> 
> You don’t build linux-perf? I can only find it on the debian repo but
> not on the proxmox one nor
> http://download.proxmox.com/debian/pve/dists/buster/pvetest/binary-amd64/

called 'linux-tools-$KERNEL_ABI', e.g. linux-tools-5.4, in PVE.