All things related to multicast

[Brent Draney <>]

Have you verified that a source connected to switch A and a receiver
on switch B works?  I assume that switch A and switch B ar the ones
running vrrp.

Brent

> Brent,
> 
> Here is the sime topology map:  This should help.
> 
> 
> [receiver 1] ---- [switch A]-----------[switch B]--- [receiver 2] 
>                         \                     /
>                           \                 / 
>                             [L2 switch]
>                             |
>                             [Source]
> 
> The Source can be seen by receiver 1, but not by receiver 2.  Turn on VRRP 
> and single home it and everything works fine.
> Switch A is the one that sends the PIM register messages to the RP. Switch 
> B, sees the src, and creates an entry in its mroute table.
> The L2 switch is definitely sending traffic up to switch B. 
> 
> Thanks
> Anand
> 
> 
> 
> 
> 
> Brent Draney 
> <>
>  
> 07/27/2006 12:50 PM
> 
> To
> 
> cc
> ,
>  
> 
> Subject
> Re: Question on expected behavior.
> 
> 
> 
> 
> 
> 
> 
> Have you tried bridging the 2 switches together without vrrp and
> verifying that hosts on both switches will be able to join?  I
> would guess that its a snooping bug with bridged switches and 
> has nothing to do with vrrp which is a layer-3 thing.
> 
> Brent
> 
> > 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
> > 
> > 
> > 
> > 
> > 
> 
> 
> 
>