[pve-devel] corosync, multicast problem because of vmbr multicast_snooping enabled

Alexandre DERUMIER aderumier at odiso.com
Mon Mar 4 06:48:17 CET 2013


>>The question is if that can have bad side effects? 

I'll investigate this week with my network engineer coworker . multicast_snooping has been added to linux bridge in 2010.

I can put a workaround in /etc/network/interface to disable it, so it's ok for now.
And I'll put my proxmox host ip outside the bridge, directly on interface.


I'll also send a patch for copy_bridge_config sub, to copy multicast options of parent bridge for vlan bridges.


----- Mail original ----- 

De: "Dietmar Maurer" <dietmar at proxmox.com> 
À: "Alexandre DERUMIER" <aderumier at odiso.com>, pve-devel at pve.proxmox.com 
Envoyé: Lundi 4 Mars 2013 06:40:04 
Objet: RE: [pve-devel] corosync, multicast problem because of vmbr multicast_snooping enabled 

> I don't known how exactly it's works with linux bridge, But as my proxmox host 
> ip is on vmbr0 (the default proxmox setup), 
> 
> echo 0 > /sys/class/net/vmbr0/bridge/multicast_snooping 
> 
> has resolved all my problems. 
> 
> 
> I'm not sure, but I think we should disable multicast_snooping by default. (Don't 
> known if it can cause regression ?) 

The question is if that can have bad side effects? 


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