Hi Jason, I haven't looked up Lab10 but the first ping packet will get sent to the RP and forwarded from there to the receiver. Then the following packets should go direct assuming you haven't changed the threshold. If you try a ping with more than one packet you will probably find that subsequent pings fail.
Cheers, Ben. From: J D'Silva <[email protected]<mailto:[email protected]>> Date: Sat, 7 Jan 2012 21:48:58 -0700 To: OSL Routing and Switching <[email protected]<mailto:[email protected]>> Subject: [OSL | CCIE_RS] Vol3 Lab 10 Multicast HI All, I'm sure I'm just missing something basic, but I'm at a complete loss as to what it is. Like the subject says, Vol3 Lab 10. Multicast section. I have it up and working... But it shouldn't be working. My confusion is on R1. R1#sh ip pim int Address Interface Ver/ Nbr Query DR DR Mode Count Intvl Prior 163.144.12.1 FastEthernet0/0.12 v2/S 1 30 1 163.144.12.2 163.144.131.1 FastEthernet0/0.131 v2/S 1 30 1 163.144.131.13 163.144.121.1 FastEthernet0/0.121 v2/S 1 30 1 163.144.121.12 (163.144.245.4, 239.14.14.14), 00:03:21/00:00:08, flags: Incoming interface: Null, RPF nbr 163.144.15.5 Outgoing interface list: FastEthernet0/0.121, Forward/Sparse, 00:03:22/00:03:06 FastEthernet0/0.131, Forward/Sparse, 00:03:22/00:03:19 R1#sh ip rpf 163.144.245.4 RPF information for ? (163.144.245.4) failed, no route exists Jan 8 04:32:51.606: IP(0): s=163.144.245.4 (FastEthernet0/0.12) d=239.14.14.14 (FastEthernet0/0.131) id=127, ttl=253, prot=1, len=100(100), mforward The mroute looks off to me... There's no flags and there's no incoming interface... The RPF neighour is R5 (task disallows multicast enabled on that link). You can also see the RPF if failing for the multicast source required to complete the task. Yet, with debug IP mpacket you can see the mpacket is received, and forwarded, even though it should be failing the RPF check. Why the heck is R1 forwarding an mpacket that is failing RPF? I've managed to get all 7 points since I haven't added any mroutes.... But I also haven't used MBGP, which is likely what the task was getting at for the bonus points... R4#ping 239.14.14.14 Type escape sequence to abort. Sending 1, 100-byte ICMP Echos to 239.14.14.14, timeout is 2 seconds: Reply to request 0 from 163.144.43.14, 76 ms Reply to request 0 from 163.144.43.14, 100 ms R4# Jason _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
