Multicast tunneling

From: Kay D (krsna83@gmail.com)
Date: Wed Jun 28 2006 - 04:05:16 ART


Router2(s1) -----(s1)Router1(s0) ------(s0)Router3(e0)
------------(e0)router 7
                          |(e0)
                          |
 ---------------------------------------
                     Router4(e0) Tunneling between R1 & R7

---------------------------------------

configured R7 's loopback with ip igmp join-group 235.1.1.1
configured R4's loopback with ip igmp join-group 235.2.2.2

R2's loopback is the RP address (10.10.2.2)

I wanted to tunnel from R1 to R7 as R3 does not support Multicasting

R7 CONFIGURATION
interface Tunnel0
 ip unnumbered Loopback0
 ip pim sparse-mode
 tunnel source 10.10.7.7
 tunnel destination 10.10.1.1

ip mroute 0.0.0.0 0.0.0.0 Tunnel0

R1 CONFIGURATION
interface Tunnel0
 ip unnumbered Serial0
 ip pim sparse-mode
 tunnel source 10.10.1.1
 tunnel destination 10.10.7.7

ip mroute 10.10.7.7 255.255.255.255 tunn 0
ip mroute 10.10.37.7 255.255.255.255 tunn 0

I am able to ping to 235.1.1.1 from R1
but i am not able to ping from R7 to 235.2.2.2

The output at R7 says this ,

(10.10.7.7, 235.1.1.1), 00:02:20/00:02:28, flags: PFT
  Incoming interface: Loopback0, RPF nbr 0.0.0.0
  Outgoing interface list: Null

the output at R1 says this ,

(10.10.1.1, 235.1.1.1), 00:01:02/00:01:57, flags: PFT
  Incoming interface: Loopback0, RPF nbr 0.0.0.0
  Outgoing interface list: Null

but R1 is able to ping to 235.1.1.1

Please let me know what i am missing .

Kay



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