All things related to multicast

[Alan Crosswell <>]

> Dear all
> 
> Does anyone know how to retrieve multicast receiver IP attaching to
> Cisco layer-2 switches 2900XL and 3550? I could only get group MAC
> address together with outgoing interface(s) using "sh cgmp" command. (I
> know that I could grep it using debug cgmp but is there another
> solution?) Thanks a lot!
> 
> The sample "sh cgmp" output is as follows:
> 
> c2900#sh cgmp
> CGMP is running.
> CGMP Fast Leave is running.
> Default router timeout is 300 sec.
> 
> 
> vLAN     IGMP MAC Address   Interfaces
> ------  -----------------   -----------
>     1    0100.5e00.0128      Fa0/1
>     1    0100.5e05.0647      Fa0/1 Fa0/4
> 
> 
> vLAN     IGMP Router        Expire   Interface
> ------  -----------------  --------  ----------
>     1    0001.4294.cda1     251 sec   Fa0/1
> 
> 
> Regards,
> philip
> Hong Kong IP Multicast Initiative (HKIPMI)
> Department of Information Engineering
> The Chinese University of Hong Kong
> Phone : 2603 5240
> Fax : 2603 5032
> 

I believe you need to look on the router (which is doing IGMP) that is
speaking to the switch with CGMP.
/a