Multicast routing problem

From: Edward Taggart (etaggart@xxxxxxxxx)
Date: Sun Oct 31 1999 - 00:51:59 GMT-3

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I'm having difficulty with multicast routing over a frame network. Here's
my setup...

        R1 ---- R2 ----- R3

R2 is frame hub with phys multipoint int, R1 & R3 are spokes with point to
point subinterfaces. All routing and ip connectivity is good.

Sample configs:

R1:
Int E0
  ip igmp join-group 224.10.1.2
  ip pim dense-mode
Int S0.1
  ip pim dense-mode

R2:
Int E0
  ip igmp join-group 224.10.1.2
  ip pim dense-mode
Int S0
  ip pim dense-mode

R3
Int E0
  ip igmp join-group 224.10.1.2
  ip pim dense-mode
Int S0.1
  ip pim dense-mode

Pinging the multicast address 224.10.1.2 from R2 gets responses from R1 &
R3. Pining from R1 there's no response from R3 and from R3 nothing from R1.
It's similar to a split-horizon problem.. Any help would be appreciated!

Thanks - Ed

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