From: Adhu Ajit (adhu_ajit@yahoo.com)
Date: Thu Nov 02 2006 - 15:43:08 ART
Eugene, that's exactly my point. Why is the Info Source shown on the Mapping agent not the same as others routers in the domain ? I tried searching for caveats for this command display on the Cisco website but cant find any. Hence my question on the alias.
Thank you.
Eugene Ward <eward15@juno.com> wrote:
Adhu,
Looking at your output again this is how I see it:
R4--293#show ip pim rp mapping
PIM Group-to-RP Mappings
This system is an RP (Auto-RP) <------------------R4 correctly knows it's an RP...
Group(s) 224.0.0.0/4
RP 4.4.4.4 (?), v2v1
Info source: 6.6.6.6 (?), elected via Auto-RP <-----Because R6 (MA) said so.
Uptime: 00:01:18, expires: 00:02:40 R4--293#
R6--295#show ip pim rp mapping
PIM Group-to-RP Mappings
This system is an RP-mapping agent (Loopback0) <------R6 is the MA...
Group(s) 224.0.0.0/4
RP 4.4.4.4 (?), v2v1
Info source: 4.4.4.4 (?), elected via Auto-RP <----and it learned its groups from R4.
Uptime: 00:00:59, expires: 00:01:59 R6--295#
R2--291#show ip pim rp mapping
PIM Group-to-RP Mappings
Group(s) 224.0.0.0/4 <----Oridinary router; R2 learned about these groups....
RP 4.4.4.4 (?), v2v1
Info source: 6.6.6.6 (?), elected via Auto-RP <------from R6, which is the MA.
Uptime: 00:01:14, expires: 00:02:42 R2--291#
In all cases, each router picked 4.4.4.4 as the RP for the 224/8 range, but I think the output varies depending upon the role each router plays. I've been wrong before...:)
Eugene
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