[f-nsp] Multicast is being switched by LP CPU on MLXe?

[Alexander Shikoff]

Hi!

On Mon, Dec 19, 2016 at 04:14:28PM -0700, Eldon Koyle wrote:
> For IGMP snooping to work, there must be an L3 device acting as an
> IGMP querier on your L2 domain (typically a router).  This device is
> in charge of keeping track of which IGMP clients have asked for which
> multicast groups, and periodically asking if they still want it.  The
> MLX would not need to be the querier, but there has to be one in that
> VLAN.
> 
> If there is no IGMP querier, your only real option would be to flood
> all the multicast (unless you are connecting a group of routers that
> are speaking PIM, then pim snooping might be able to help you).

There IS one querier:

telnet at lsr1-gdr.ki#show ip multicast vlan 450
----------+-----+---------+---------------+-----+-----+------
VLAN       State Mode      Active          Time (*, G)(S, G)  
                           Querier         Query Count Count
----------+-----+---------+---------------+-----+-----+------
450        Ena   Passive   192.168.210.1   119   1     1
----------+-----+---------+---------------+-----+-----+------
 
Router ports: 12/8 (11s)
 
Flags-  R: Router Port,  V2|V3: IGMP Receiver,  P_G|P_SG: PIM Join
 
  1    (*, 239.32.4.130) 00:34:48       NumOIF: 1       profile: none
          Outgoing Interfaces:
               e9/5 vlan 450 ( V2) 00:34:48/40s

  1    (91.238.195.1, 239.32.4.130) in e11/2 vlan 450 00:34:48          NumOIF: 1  profile: none
          Outgoing Interfaces:
               TR(e9/5,e7/1) vlan 450 ( V2) 00:34:48/0s
          FID: 0xa0a9     MVID: None


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