[PVE-User] Proxmox VE 7.0 (beta) released!

alexandre derumier aderumier at odiso.com
Tue Jun 29 15:51:06 CEST 2021


Hi,
I have found a bug report about promisc && vlan-aware on mellanox site,
of a proxmox user.

(proxmox 6.4 with kernel (5.12?)

https://community.mellanox.com/s/question/0D51T00008ansfP/vlan-aware-linux-bridging-is-not-functional-on-connectx4lx-card-unless-manually-put-in-promiscuous-mode


So maybe is it a kernel change ?

I don't known is that ifupdown2 has been bumped to last master ? (I
don't have seen special commit of this kind of change)



Le mardi 29 juin 2021 à 15:31 +0200, Stoiko Ivanov a écrit :
> On Tue, 29 Jun 2021 14:04:05 +0200
> Mark Schouten <mark at tuxis.nl> wrote:
> 
> > Hi,
> > 
> > Op 29-06-2021 om 12:31 schreef Thomas Lamprecht:
> > > > I do not completely understand why that fixes it though. 
> > > > Commenting out MACAddressPolicy=persistent helps, but why?
> > > >  
> > > 
> > 
> > That I understand. :)
> > 
> > But, the cluster interface works when bridge_vlan_aware is off, 
> > regardless of the MacAddressPolicy setting.
> > 
> 
> We managed to find a reproducer - my current guess is that it might
> have
> something to do with intel NIC drivers or some changes in ifupdown2 (or
> udev, or in their interaction ;) - Sadly if tcpdump fixes the issues,
> it
> makes debugging quite hard :)
> 
> In any case - as can also be seen in the 2 reports you sent:
> with vlan-aware bridges the promisc flag of the ethernet interface (the
> bridge-port) is set to 0, when vlan-aware is not present it is set to
> 1.
> This explains the symptoms you're seeing, and why running tcpdump fixes
> it
> 
> FWIW: I think simply starting a guest would have fixed the issue as
> well
> (when a second bridge_port gets added the kernel sets the promisc flag
> on
> the port correctly)
> 
> As Wolfgang wrote - we'll look into it and will hopefully come up with
> a
> sensible solution.
> 
> Thanks for the beta-test and the report!
> 
> 
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