From: Victor Cappuccio (cvictor@protokolgroup.com)
Date: Thu Mar 23 2006 - 17:54:52 GMT-3
Hey Thanks to all for your support, but the problem was that R2 and R5
had an RPF Fail
*Mar 1 00:19:33.122: IP(0): s=136.1.136.3 (Serial0/0) d=228.22.22.22
id=179, prot=1, len=104(100), not RPF interface
You got to look at the InternetworkExperts Advance Multicast COD, man
the Brians are excellent teachers.
Finally I understand when an RPF Check is ok or Failing to Forward IP
Multicast Traffic..
>>
>>
>> ------------------------------------------------------------------------
>> *From:* nobody@groupstudy.com on behalf of Victor Cappuccio
>> *Sent:* Wed 3/22/2006 8:26 PM
>> *To:* CCIE LAB
>> *Subject:* Next hop IP address required
>>
>> Hello List, is there any way to know which is the next hop for ip mroute
>> in a multi-access media??
>>
>> I have a multicast topology like this
>>
>> 228.22.22.22 |==E0= R2 -S0---------S0-R5 -S1 ----S0-- R1 =E0 ==== E0 =
>> R3-- |
>>
>> All the interfaces are running ip pim sparse-dense-mode, and the problem
>> is that the RPF Fails, because there is a ppp link between R2 and R3 and
>> the unicast routing prefers that link to reach destinations in R3/R2, so
>> where do you put the ip mroute 0.0.0.0 255.255.255.255 (on R2 or R3?)
>> and which is the next hop required?
>>
>>
>> Rack1R3#show ip pim interface
>>
>> Address Interface Ver/ Nbr Query DR DR
>> Mode Count Intvl Prior
>> 136.1.3.3 Ethernet0/0 v2/SD 0 30 1
>> 136.1.3.3
>> 136.1.136.3 Ethernet0/1 v2/D 1 30 1
>> 136.1.136.3
>>
>> ====
>> Rack1R1#ping 228.22.22.22 source 136.1.136.1 (this is the network
>> where R3 also is)
>>
>> Type escape sequence to abort.
>> Sending 1, 100-byte ICMP Echos to 228.22.22.22, timeout is 2 seconds:
>> Packet sent with a source address of 136.1.136.1
>> .
>> Rack1R1#
>> Rack1R1#ping 228.22.22.22
>> Type escape sequence to abort.
>> Sending 1, 100-byte ICMP Echos to 228.22.22.22, timeout is 2 seconds:
>>
>> Reply to request 0 from 136.1.245.2, 176 ms
>> Rack1R1#
>> ====
>>
>> Rack1R1#show ip pim neighbor
>> PIM Neighbor Table
>> Neighbor Interface Uptime/Expires Ver DR
>> Address
>> Prio/Mode
>> 136.1.136.3 FastEthernet0/0 01:22:25/00:01:29 v2 1
>> / DR S
>> 136.1.15.5 Serial0/0 03:31:31/00:01:25 v2 1
>> / DR S
>>
>>
>>
>>
>> Thanks
>> Victor.
>>
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