From: Balogh, Jim (jim.balogh@gwl.com)
Date: Fri Nov 04 2005 - 21:43:05 GMT-3
Not sure....good question! Anyone know?
Jim
________________________________
From: Chris Lewis [mailto:chrlewiscsco@yahoo.com]
Sent: Friday, November 04, 2005 5:29 PM
To: Balogh, Jim; kevin gannon; ccielab@groupstudy.com
Subject: RE: Sparse mode multicast ?
what if the shared tree and source tree are congruent?
Chris
"Balogh, Jim" <jim.balogh@gwl.com> wrote:
Kevin,
Just gave the scenario a quick glance, and you need the ip pim
spt-threshold command on the last-hop router....in this case R2.
The switch from shared to source tree (with Sparse Mode) happens
upon
the arrival of the first data packet at the last hop router.
This switch
occurs because the ip pim spt-threshold interface configuration
command
controls that timing, and its default setting is 0 kbps.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
Behalf Of
kevin gannon
Sent: Wednesday, November 02, 2005 12:12 PM
To: ccielab@groupstudy.com
Subject: Re: Sparse mode multicast ?
Anyone any ideas ?
Regards
Kevin
On 11/1/05, kevin gannon wrote:
> Have a simple set with three routers
>
> R2--------R5(RP)--------R3
>
> Its running all sparse mode. R2 has an igmp join statement for
> 225.25.25.25 and R3 is sending a ping to this group source
from
> 35.35.35.3. Below is the mroutes I see on R3 the source of the
stream.
> I am experimenting with set the spt threshold to infinity on
R3 below
> is the different mroute
> outputs:
>
> Default setup no SPT threshold changed
> ####################################################
> (*, 225.25.25.25), 00:36:46/stopped, RP 5.5.5.5, flags: SJPCL
> Incoming interface: Serial0/1, RPF nbr 35.35.35.5
> Outgoing interface list: Null
>
> (35.35.35.3, 225.25.25.25), 00:05:20/00:02:59, flags: PLT
> Incoming interface: Serial0/1, RPF nbr 0.0.0.0, Registering
> Outgoing interface list: Null
>
> (*, 224.0.1.40), 00:37:22/stopped, RP 5.5.5.5, flags: SJPCL
> Incoming interface: Serial0/1, RPF nbr 35.35.35.5
> Outgoing interface list: Null
>
> SPT Threshold set to infinity
> ###################################################
>
> (*, 225.25.25.25), 00:40:15/stopped, RP 5.5.5.5, flags: SPCL
> Incoming interface: Serial0/1, RPF nbr 35.35.35.5
> Outgoing interface list: Null
>
> (35.35.35.3, 225.25.25.25), 00:08:49/00:02:58, flags: PLT
> Incoming interface: Serial0/1, RPF nbr 0.0.0.0, Registering
> Outgoing interface list: Null
>
> (*, 224.0.1.40), 00:40:51/stopped, RP 5.5.5.5, flags: SPCL
> Incoming interface: Serial0/1, RPF nbr 35.35.35.5
> Outgoing interface list: Null
>
> My questions:
> 1. Why do I not see any outgoing interfaces in either output
> for (35.35.35.3, 225.25.25.25),
>
> 2. In the default SPT setup how come I see the "Registering"
> going on and on and on.....
>
>
> Thanks & Regards
> Kevin
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