RE: RP-filtering - what am i missing?

From: Riapolov, Bradley (BRiapolo@wm.com)
Date: Sat Apr 21 2007 - 15:00:34 ART


interesting observation. Thank you. I finally got this to work with a lot
simpler config - thanks everybody. All you have to do is just filter the
traffic you do not want.

R4(config)#do sri pim
ip pim send-rp-discovery Loopback104 scope 16
ip pim rp-announce-filter rp-list 1 group-list 2
R4(config)#do sri access
access-list 1 permit 172.16.103.1
access-list 2 permit 231.1.1.1
R4(config)#do sh ip pi rp
Group: 231.1.1.1, RP: 172.16.101.1, v2, v1, uptime 00:02:50, expires 00:02:05

-----Original Message-----
From: Narbik Kocharians [mailto:narbikk@gmail.com]
Sent: Saturday, April 21, 2007 11:59 AM
To: Riapolov, Bradley
Cc: ccielab@groupstudy.com
Subject: Re: RP-filtering - what am i missing?

This is what i found when i tried filtering. If the RP was claiming to be the
RP for only two Mcast groups, the downstream router (The mapping agent) was
able to filter one of the groups. But if the RP was the RP for all groups i
could not filter one of the group addresses successfuly.

On 4/21/07, Riapolov, Bradley < BRiapolo@wm.com> wrote:

Two RPs ( 172.16.101.1, 172.16.103.1), R4 is mapping and has elected the
highest ip as the acting RP. Now, I would like to test RP-FILTERING with the
intent to make 172.16.101.1 the RP - it does not work, why - am I missing how
this is supposed to work? When I run debug ip pim auto-rp, filtering does not
happen!
R4#sri pim
ip pim send-rp-discovery Loopback104 scope 16
ip pim rp-announce-filter rp-list 1 group-list 2
ip pim rp-announce-filter rp-list 3 group-list 4
R4#sri access-list
access-list 1 permit 172.16.101.1
access-list 2 permit 224.0.0.0 15.255.255.255
access-list 3 deny any
access-list 4 deny any

R4(other routers show the same info) #sh ip pim rp
Group: 231.1.1.1, RP: 172.16.103.1, v2, v1, uptime 00:11:55, expires 00:02:0

Thank you,



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