From: Geert Nijs (Geert.Nijs@simac.be)
Date: Tue Jun 17 2008 - 09:48:42 ART
All i know is that this command behaves very strangly - against intuition.
Use this command with caution. RPs that are matched by rp-list (allowed by a permit statement) have their multicast groups filtered by group-list. RPs that are denied (either by an explicit or implicit deny) are not subject to the filtering of their multicast groups and are "blindly" accepted as candidate RPs for all of their groups. In other words, only RPs that are permitted by rp-list have their multicast-groups filtered by group-list. All other RPs are accepted without examination.
regards,
Geert
CCIE #13729
________________________________________
From: nobody@groupstudy.com [nobody@groupstudy.com] On Behalf Of Mujeeb Sarwar [mujeebsarwar@gmail.com]
Sent: 17 June 2008 12:33
To: Cisco certification
Subject: Filtering of multicast group mapping
Dear Group,
I have a query regarding filtering of RP to Group mapping. Let suppose
following is the topology,
R3 ------- R2 -------- R1
R3 & R2 are candidate RPs and R1 is the mapping agent. We have to filter RP
to Group mapping at R1 which we can do using rp-announce-filter with rp-list
and group-list options at mappping agent and parallely using
send-rp-announce with group-list option at candidate RPs.
Problem is that if I use deny statement in ACL on candidate RP to filter
some specific group and announce all other groups then mapping agent filters
all groups regardless of what is pemited/denied on candidate RP.
But on the other hand if I use permit statement in ACL on candidate RP to
allow specific groups then mapping agent works fine and do specific group
mappings.
Is this normal behavior or I am missing something ?
Regards,
Mujeeb
This archive was generated by hypermail 2.1.4 : Tue Jul 01 2008 - 06:23:22 ART