Re: Filtering IGMP messages for specific groups/hosts

From: Adhu Ajit (adhu_ajit@yahoo.com)
Date: Fri Nov 03 2006 - 18:43:58 ART


Ivan,
   
>> Also, can I do this ? I do not want "a specific host" from joining a
>> particular IGMP group. I can do this by setting a ACL inbound on the router
>> interface such that messages destined for a particular IGMP group
>> originating from a particular source is filetered.

> Such way you filter not only IGMP also multicast traffic from this source.
   
  I forgot to mention that I was planning to filter only igmp messages for the ACE entry. Something like

access-list 101 deny igmp host 192.168.0.1 host 239.1.1.1
  access-list 101 permit igmp any any
   
  Also, when you say that IGMP profiles can only be applied to switched ports is it a pre-requisite that: igmp snooping be turned ON ?
   
  Thanks,
  Adhu.
  
Ivan <ivan@iip.net> wrote:
  comment inside

On Friday 03 November 2006 23:36, Adhu Ajit wrote:
> Folks ....
>
> I can filter IGMP access on the router to specific groups by:
>
> ip igmp access-group
this command applied to L3 interfaces

> ip igmp profiles - and then setting the groups that I want to filter

this applied to switched port

> To me these both do the same thing. Are there differences that I'm being
> blind to ? Please comment.
>
> Also, can I do this ? I do not want "a specific host" from joining a
> particular IGMP group. I can do this by setting a ACL inbound on the router
> interface such that messages destined for a particular IGMP group
> originating from a particular source is filetered.

Such way you filter not only IGMP also multicast traffic from this source.

> Any other ways of doing this ?
>
> Thanks,
> Adhu.
>
>
>
>
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-- 
Ivan


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