RPF Failures

I'm having a problem with RPF failures that I can't seem to override with an
MRoute.

I have SW1<Ethernet>R3 <Serial-Frame> R5<Serial-Frame>R1<Ethernet>R6

R6 also connects back SW1 (acting as L3 router). Neither of SW1's
interfaces facing R3 or R6 are running PIM, but it is running OSPF. This non
PIM path is the lowest cost from R3 to R6's Loopback which is sourcing the
multicast traffic.

I created a static mroute on R3 pointing to R5 but for some reason, it still
shows its ethernet connection to SW1 as the RPF to R6's Loopback.

I should point out that R3 and R5 are not PIM neighbors as R3 is acting as
an igmp-helper for SW1 who's interface facing R3 is using the IGMP
join-group command that R3 forwards to R5. R3 has dense mode on both its
serial and ethernet interfaces.

My Mpacket debug from R3 where it is being dropped:

*Mar 6 05:57:38.900: IP(0): s=150.1.6.6 (Serial0/1/0) d=239.1.1.100 id=0,
ttl=251, prot=17, len=48(44), not RPF interface-if)

Rack1R3(config-if)#do sh ip mroute 239.1.1.100

<Omitted>

(*, 239.1.1.100), 00:57:13/stopped, RP 150.1.8.8, flags: SJCL

  Incoming interface: Serial0/1/0, RPF nbr 155.1.0.5, Mroute <<<<This is
the serial link facing R5 that the packets from R6's loopback come in on

  Outgoing interface list:

    FastEthernet0/0, Forward/Dense, 00:57:13/00:00:00

(150.1.6.6, 239.1.1.100), 00:01:00/00:01:59, flags: LJT

  Incoming interface: FastEthernet0/0, RPF nbr 155.1.37.7 <<<<<<This is the
ethernet side of R3 facing SW1

  Outgoing interface list:

    Serial0/1/0, Forward/Dense, 00:01:01/00:00:00, A

Rack1R3(config-if)#do sh ip rpf 150.1.6.6

RPF information for ? (150.1.6.6)

  RPF interface: FastEthernet0/0

  RPF neighbor: ? (155.1.37.7) <<<<<<This is SW1 acting as a L3 router
between R3 and R6

  RPF route/mask: 150.1.6.0/24

  RPF type: unicast (ospf 1)

  RPF recursion count: 0

  Doing distance-preferred lookups across tables

  Multicast Multipath enabled

Rack1R3(config-if)#do sh run | in mroute

no ip mroute-cache

ip mroute 150.1.6.6 255.255.255.255 150.1.0.5 <<<<This is R5's serial
interface facing R3's Serial 0/1/0

After 2 hours on this one, I've gotta throw in the towel and ask for help.
 Can anybody point me in the right direction?

Thanks!

Nate

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Received on Fri Mar 05 2010 - 22:46:26 ART