From: Andrew Lissitz \(alissitz\) (alissitz@cisco.com)
Date: Sat Oct 15 2005 - 10:49:58 GMT-3
It is needed everywhere that would attempt to build a spt (shortest path
tree) to the source. By specifying a threshold of infinity you can keep
the multicast traffic on the default shared tree.
Without this command, each router would send pim joins towards the
source of the multicast traffic and the spt would be built.
I have seen this in production when the company wanted to specify the
path of traffic and keep it out of the data path. I have also seen this
in MVPNs, and for similar reasons the ISP wants to keep the multicast
traffic on specific links.
Andrew
PS --> for any topic, please consider sending emails to the comserv
email dist list ... It is lonely on that email list... :-(
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
The Great Ryan
Sent: Saturday, October 15, 2005 7:21 AM
To: Cisco certification
Subject: Where I should place "ip pim spt-threshold " ?
Hi Group
R1--R2--R3
R1 is RP
R3 is running "ip igmp join-group" on its loopback interface
Where I should place "ip pim spt-threshold " such that it will never
switch to shortest-path tree?
Place this command only on R2 or all of them ?
Thanks!
Ryan
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