From: Eugene Ward (eward15@juno.com)
Date: Thu Nov 02 2006 - 17:23:18 ART
Adhu,
I just tried to lab something up. This looks like normal behavior. As the
MA, R6 will be listening to the RP advertisements from the RP's themselves,
which would explain why R6 is listing R4 as a source. The other routers will
be listening to the MA as it announces which router will be the RP for which
groups.
Eugene
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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
This archive was generated by hypermail 2.1.4 : Fri Dec 01 2006 - 08:05:45 ART