All things related to multicast

["David Farmer" <>]

The lab diagram is missing a small but important detail, who is the RP and 
do the two routers agree on the RP.  

If one of the two routers in the lab is the RP for the lab, do the symptoms 
change if you change which router is the RP?

If the lab doesn't have it own RP, do the symptoms change if you change 
which router connects to the RP?

On 21 Sep 2007 Bruce Campbell wrote:

> (I work with Yuri)
> 
> Here is a topology diagram of our test lab...
> 
>   http://ist.uwaterloo.ca/~bruce/pimlab.html
> 
> 
> 
> On 9/21/07, Yuri Kolomiyets 
> <>
>  wrote:
> > Hi All,
> >
> > We're having some troubles with PIM between Cisco and HP. Everything
> > works fine, except any stream freezes for 1 second every minute. We
> > traced it back to the periodic join/prune updates coming from HP
> > which contain a (S,G) prune for the active stream. Then 1 second
> > later the HP sends a join for the same (S,G). Here's debug from the
> > cisco side:
> >
> > *Mar  4 00:21:49.849: PIM(0): Received v2 Join/Prune on
> > GigabitEthernet1/0/24 from 10.0.0.2, to us
> > *Mar  4 00:21:49.849: PIM(0): Join-list: (*, 239.255.100.100),
> > RPT-bit set, WC-bit set, S-bit set *Mar  4 00:21:49.849: PIM(0):
> > Update GigabitEthernet1/0/24/10.0.0.2 to (*, 239.255.100.100),
> > Forward state, by PIM *G Join *Mar  4 00:21:49.849: PIM(0):
> > Prune-list: (10.0.3.2/32, 239.255.100.100) RPT-bit set *Mar  4
> > 00:21:49.849: PIM(0): Prune GigabitEthernet1/0/24/239.255.100.100
> > from (10.0.3.2/32, 239.255.100.100) - deleted *Mar  4 00:21:50.848:
> > PIM(0): Received v2 Join/Prune on GigabitEthernet1/0/24 from
> > 10.0.0.2, to us *Mar  4 00:21:50.848: PIM(0): Join-list:
> > (10.0.3.2/32, 239.255.100.100), S-bit set *Mar  4 00:21:50.848:
> > PIM(0): Add GigabitEthernet1/0/24/10.0.0.2 to (10.0.3.2,
> > 239.255.100.100), Forward state, by PIM SG Jon
> >
> >
> > This is happening in our production network, as well as a little lab
> > we set up to test this. The lab setup is a 3750 Cisco and a 3500 HP
> > with 2 laptops connected to each switch. If anyone interested in the
> > lab configs, I posted them here:
> > http://ist.uwaterloo.ca/~ykolomiy/multicast-lab-configs.txt
> >
> > If anyone has any idea why this might be happening and what we can
> > do to fix it, we'd really appreciate it.
> >
> > Thanks a lot,
> >
> > Yuri Kolomiyets
> >
> > Network Services
> > Information Systems & Technology
> > University of Waterloo
> >
> > E-mail: 
> > 
> > Phone: (519) 888-4567 x36999
> >
> >
> 



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David Farmer                            Email:  

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