From: Sundar Palaniappan (sundarp@gmail.com)
Date: Sun Mar 27 2005 - 02:34:54 GMT-3
Guys,
Just had a multicasting question come up.
Have a simple hub-and-spoke setup.
R1 & R2 are spokes using physical interface. R3 is the hub using a
multipoint interface.
Using PIM SM with R3 as the static RP.
Multicasting Enabled interfaces.
R1 e0
R1 s0
R2 e0
R2 s0
R3 s0.1
R2's e0 has "ip igmp join-group 224.24.24.24" configured.
Two Questions
1. I thought, I shouldn't be able to ping 224.24.24.24 from R1 and get
any echo-replies. However, I was getting echo-replies for the 1st ping
for one interface (s0) and subsequent pings failed. Why am I able to
ping once from R1 since R3 shouldn't forward multicast packets back
out the same interface to R2.
2. I created a tunnel int between R1 & R2. I am able to ping mcast
group 224.24.24.24 from R1. However, I can't source R1's e0 and ping
the multicast group. I always get one echo-reply only for the
tunnel-interface. If the lab states user on R1's e0 should be able to
receive multicast packets from R2's e0 would this work?
TIA,
Sundar Palaniappan
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