From: Prashant Shukla (shukla_cisco@yahoo.co.in)
Date: Sun May 27 2007 - 12:05:45 ART
Ovidiu,
In a typical Hub-n-spoke topology, if the spoke is the RPor MA , then other spoke cannot recieve the MA announcements as MA uses dense-mode for announcements which will not be sent across by the HUB router as it will not send any multicast traffic back to the interface from where it recvd it.
The solution is to have a tunnel between the 2 spokes and to add a static mroute to allow MA advertisements from the other spoke.
u can use " ip pim nbma-mode" on hub to allow sparse mode traffic to flow across.
HTH.
Shukla.
Ovidiu Neghina <o.neghina@gmail.com> wrote: Hi dear all
I have a situation where a router R1 has 2 point-to-point frame-relay
interfaces towards another 2 routers. One of them is RP and Mapping agent
(R2) for 224.1.1.1/32 .
The problem that I have is R1 does not forward the mapping information
towards the other router R3 , i.e. does not forward the 224.0.1.40 on the
point-to-point link.
every router is configured with sparse-mode on the interfaces.
Is this normal ? Shouldn't packets destined to 224.0.1.40 be sent
everywhere interface/subinterface where it has a pim neighbor ?
Thank you
Ovidiu
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