From: Huan Pham (huan.pham@valuenet.com.au)
Date: Mon Jan 21 2008 - 23:20:05 ARST
Hi Topass,
It is an interesting scenario. I believe you can do this by having R1 to
advertise more specific groups when it announces itself as a Candidate RP.
This is done via using an ACL. Mapping Agent will pickup R1 as the RP
because it advertises a more specific group range, (even though R2 has a
higher IP).
Example:
R1#
ip pim send-rp-announce Loopback0 scope 10 group-list 1
access-list 1 permit 224.1.1.1 ! Specify the Mgroup you are running
R2#
ip pim send-rp-announce Loopback0 scope 10
I have labbed up this setup, (R1 Loop0 1.1.1.1, R2 Loop0 2.2.2.2), and I
have two Multicast Group running 224.1.1.1 (which R1 is the Primary), and
another unrelated Group 2.2.2.2 (just for demonstration, in which R2 is the
RP by default) and got the below result:
R1#sh ip pim rp
Group: 224.2.2.2, RP: 2.2.2.2, v2, uptime 00:22:57, expires 00:02:57
Group: 224.1.1.1, RP: 1.1.1.1, v2, v1, next RP-reachable in 00:00:43
R1#sh ip pim rp mapping
PIM Group-to-RP Mappings
This system is an RP (Auto-RP)
Group(s) 224.0.0.0/4
RP 2.2.2.2 (?), v2v1
Info source: 3.3.3.3 (?), elected via Auto-RP
Uptime: 00:23:03, expires: 00:02:50
Group(s) 224.1.1.1/32
RP 1.1.1.1 (?), v2v1
Info source: 3.3.3.3 (?), elected via Auto-RP
Uptime: 00:18:59, expires: 00:02:48
Cheers,
Huan
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Topass Mustpass
Sent: Monday, 21 January 2008 11:13 PM
To: ccielab@groupstudy.com
Subject: FW: Backup RP in AutoRP
please can anyone give more information about this.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Topass Mustpass
Sent: Wednesday, January 16, 2008 9:14 AM
To: ccielab@groupstudy.com
Subject: Backup RP in AutoRP
I have a Scenario where I want to make R1 and R2 RP in a sparse -mode
multicast uing the loopback 0 as a preffered interface on R1 and R2.
R1 Lo0= 192.1.1.1
R2Lo0 =192.1.1.2
I want the R2 to be the backup RP while R1 is Primary RP.Please i need
more info how to accomplish this without using Satic RP and BSR. I mean
using only Autorp.
I am still thinking of what will make R1 be a a primary RP even when it has
a lower IP than
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