From: Greg Gombas (ggombas@hotmail.com)
Date: Wed Jan 04 2006 - 13:55:54 GMT-3
I was hoping one of the resident Multicast experts could explain this
scenario - maybe Mr. Scott Morris? (I read your chapter in CCIE practical
studies!)
[R1]-L0 150.1.1.1 <--- This is the RP
s0| |s1
| |
s0| |s1 <--- This interface is the preferred unicast route to RP but PIM is
disabled.
[R2]
R1 and R2 are connected to each either by two point to point T1 links.
R2 needs to send a pim sparse-mode join to the RP which is the loopback
address of R1.
R2's unicast routing table shows Serial1 as the best route to the RP.
Unfortunately PIM is not allowed to be enabled on Serial1 and is only
enabled on Serial0.
In this situation, would the PIM join then be sent via Serial 0 instead? Or
would this cause an RPF failure?
I'm thinking the join would not be forwarded.
I believe the solution was to add a quad zero mroute pointing to the IP of
R1's Serial 0 interface.
Could someone explain why that would worK?
Thanks in advance!
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