All things related to multicast

Alan,
        The funny thing about this is that the mroute entry is absolutely 
correct.  Its point to the right interface.   In this case the RPF check 
works fine, because the mroute entry is present. 
Also, I noticed one more thing that was a little strage... every so ofter 
I would see the switch B, send a pim register messages to the RP?  That 
should not occur Correct? 


GROUP           SOURCE          SRCMASK         UPSTREAM_NBR    IF EXPIR 
PROT
239.1.1.55      10.1.1.30            255.255.255.0   25.1.105.185  V149 
188   pimsm

Thanks
Anand





Alan Crosswell 
<>
 
07/27/2006 01:39 PM

To

cc

Subject
Re: Question on expected behavior.






We've seen this with HSRP.  The RPF check fails unless you set up a static
mroute or have a dynamic routing protocol running.
/a


 wrote:
> Hi,
>         I have a question on what should be expected behavior for 
> PIM/IGMP.
> 
> I have a source which sits behind two switches that are running vrrp. 
> 
> Switch A IP: 10.1.1.9
> Switch B IP: 10.1.1.10
> Virtual IP:      10.1.1.11.
> 
> I also have some users that are directly connected to Switch A, and 
Switch 
> B.  For some odd reason all users that are connected to Switch A can 
> receive the stream.
> Everyone connected to Switch B cannot.  The funny thing is that if I 
> single home the same source onto switch A it works fine.  If I single 
home 
> the src to Switch B it works fine.  The only time it has issues is if 
they 
> are in this VRRP configuration.
> 
> Question: 
> Because Switch A is the IGMP designated router, does that mean Switch B 
> should stop responding to any requests for that Group? even though its 
> directly connected to that group? 
> 
> Or is this another Bug?  Both switches are Nortel 8600's.
> 
> Thanks
> Anand
> 
> 
> 
> 
>