Re: RPF Failures

hey Nate, you could try to point to an outgoing interface instead of a
next-hop in your mroute statement
let's see...

On Sat, Mar 6, 2010 at 5:46 AM, Nate Lee <natetlee_at_gmail.com> wrote:

> 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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Bobola Oke
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