From: one atatime (pickinmynose@googlemail.com)
Date: Mon Sep 29 2008 - 19:16:26 ART
My guess would be that you are successful for the first few pings then the
Mcast group switches to the SPT across the NBMA network. There is not a
direct PIM relationship between the spoke routers so they cannot build a
complete tree to each other. Try the following.
Make the PIM router originating the request toward the RP the pim DR for the
segment originating the IGMP (using the ip pim dr-priority interface
command). Then issue the "ip pim stp threhold infinity" command so that
when the tree is built to the RP it will never switch to the SPT (there is
no benefit in it doing so in this topology anyway).
See if that sorts it out.
Good luck
Pick
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