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

Alexandre DERUMIER aderumier at odiso.com
Fri Mar 8 18:26:59 CET 2013


Hi Michael,

>>You are certain that it is not your switch which is causing problems? 
Do you talk to me or Dietmar ?

>>I have never seen multicast problems in my log files and my switch will 
>>block multicast traffic unless multicast snooping is enabled on the 
>>ports involved or the entire vlan. 
This is strange, with multicast snooping (on your switch), your switch should forward multicast traffic to all ports,
and not block it.
What is your switch model ?



What I don't known is the relationship between igmp snooping of linux bridge and igmp snooping of a physical switchs.


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

De: "Michael Rasmussen" <mir at datanom.net> 
À: pve-devel at pve.proxmox.com 
Envoyé: Vendredi 8 Mars 2013 17:31:24 
Objet: Re: [pve-devel] corosync, multicast problem because of vmbr multicast_snooping enabled 

On Fri, 08 Mar 2013 17:20:53 +0100 (CET) 
Alexandre DERUMIER <aderumier at odiso.com> wrote: 

> 
> Just an idea, can you try to reboot your physicals switchs ? 
> Maybe old igmp snooping from bridge was propagated to your switchs... 
> (I think that igmp queries are send from linux bridge to all interfaces connected to it) 
> 
> 
> But Indeed, that's not an easy update,i'm not sure it's possible to push it by default to next kernel. 
> 
You are certain that it is not your switch which is causing problems? 
I have never seen multicast problems in my log files and my switch will 
block multicast traffic unless multicast snooping is enabled on the 
ports involved or the entire vlan. 

-- 
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Michael Rasmussen 

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