[ovs-dev] IGMP Snooping support Last leave message.

Flavio Leitner fbl at sysclose.org
Thu Aug 6 19:14:34 UTC 2015


On Fri, Aug 07, 2015 at 12:00:14AM +0530, laxmikanta.behera at gmail.com wrote:
> Hi ,
> 
> 
> 
> IGMP Snooping table erasing  multicast group IP after receiving the 1st
> leave message from host.  vswitch is not waiting till receive the last
> leave message for the same multicast group IP from different host.

The default is one host per port, so the first leave will drop the
address from the multicast db.

> *Description*
> 
> 
> 
> 1.       Host 1 and 2 both connected with port number 2.
> 
> 2.       Host 1(00:00:00:00:00:01) – sending Join message to Multicast
> group Ip(239.255.255.250)
> 
> 3.       After 100 sec
> 
> 4.       Host 2 (A0:36:9F:4F:38:97) – Sending Join message to same
> Multicast group Ip(239.255.255.250)
> 
> 5.       After 100 sec
> 
> 6.       Host1 –Sending Leave message to Multicast group
> Ip(239.255.255.250).
> 
>             After receive the 1st leave message, vswitch is erasing the
> group IP  from IGMP snooping table.  Please find below snap shot.
> Could you please confirm if OVS support the last leave message or not.

How are you connecting your hosts? Usually you have one host per port
but that doesn't seem to be your use case.

fbl




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