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igmp query with cisco catalyst

SOLVED
Comes here often

igmp query with cisco catalyst

I am trying to set up PIM multicast routing between a cisco switch and  a meraki MS420. on the cisco side I am getting the following error from the meraki switch.

 

%IGMP-3-QUERY_INT_MISMATCH: Received a non-matching query interval 12, from querier address

 

I have change the "ip igmp query interval" from the cisco standard "60" to the rfc standard "125" and still get the same error.

1 ACCEPTED SOLUTION

Accepted Solutions
Meraki Employee

Re: igmp query with cisco catalyst

This should be fixed as of switch firmware version 10.32 using the rfc standard 125 seconds.

6 REPLIES 6
Kind of a big deal

Re: igmp query with cisco catalyst

Try setting ip igmp query-interval 25 to see if it helps. 

Adam R MS | CISSP, CISM, VCP, MCITP, CCNP, ITILv3, CMNO
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Kind of a big deal

Re: igmp query with cisco catalyst

I pass Source Specific Multicast (SSM) through a small Meraki switch without issues, so I can stream encrypted 4K videos. To do this, I ensure that IGMPv3 snooping is enabled. But the MX does not handle SSM, and there is no information as to when it might. As a workaround, I have ordered a router that does handle SSM to place ahead of the MX.

Mod_SSM_Solution.jpg

Ideally, I would have just put another MS switch ahead of the MX64 and used an IPv6 address, but my ISP has not fully rolled out IPv6 , yet and there are limitations as to what Meraki does with IPv6 presently. 

 

 

 

Robin St.Clair | Principal, Caithness Analytics | @uberseehandel
Kind of a big deal

Re: igmp query with cisco catalyst

What happens if you change the query interval to 12 to match the error message,

Comes here often

Re: igmp query with cisco catalyst

the errors go away when changing to 12. it looks like its a bug in the meraki query interval on the MS 420. the RFC standard is 125 and it looks like some one forgot the 5 at the end of the number.

Kind of a big deal

Re: igmp query with cisco catalyst

There is a lengthy section in a Cisco document on the topic of IGMP query-interval

 

EG - 

The Cisco IOS software uses a default IGMP query interval of 60 seconds, which is different from the RFC standard default of 125 seconds. Using a lower default IGMP query interval of 60 seconds allows routers to stop forwarding traffic faster when a member crashes without sending leaves (in IGMPv2 or IGMPv3 environment), or if using IGMPv1: 3 * 60 seconds versus 3 * 125 seconds.

If a lower version IGMP-enabled interface (that is, an interface running IGMPv1 or v2) receives a higher version IGMP query (IGMPv3) with a different query interval, the following events will occur:

An error message in the following format will be displayed:
%IGMP-3-QUERY_INT_MISMATCH: Received a non-matching query interval <interval in seconds>, from querier address <ip-address>

 

There is too much to copy everything, but it is illuminating to read up on it.

 

 

 

 

Robin St.Clair | Principal, Caithness Analytics | @uberseehandel
Meraki Employee

Re: igmp query with cisco catalyst

This should be fixed as of switch firmware version 10.32 using the rfc standard 125 seconds.

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