Subject: Re: bonding questions: "replaying" call to set_multicast_list and sending IGMP doing Fail-Over

From: Or Gerlitz <[email-masked]>
Date: Thu, 10 Aug 2006 16:03:54 +0300

Jay Vosburgh wrote:
> 	I haven't studied the effects of having large amounts of
> multicast traffic coming in under this situation.
> 
> 	However, I would suspect that the MAC filters found on
> sufficiently modern network adapters would drop the incoming multicast
> traffic on the backup slaves, as only the active slave in active-backup
> mode has its multicast list set.  That information is sent to a slave
> when it becomes the active slave; see the call to bond_mc_swap() made by
> bond_change_active_slave().

OK, i agree the MAC filter would drop the incoming traffic on the backup 
slaves b/c bond_mc_swap() calls bond_mc_delete() on the slave which 
becomes a backup one. But as you have noted there might be some impact 
on the switch.

Or.