All things related to multicast

["Bruce Campbell" <>]

Loopback interface on Cisco (10.0.0.100 ) is RP,
and both switches agree.  Lab is isolated from
rest of our network.  We didn't try moving RP
to HP.  I think we have enough now to show
this is an HP bug, we'll forward the thread
to HP tech support.


On 9/21/07, David Farmer 
<>
 wrote:
> 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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