From: Hobbs (deadheadblues@gmail.com)
Date: Wed Oct 01 2008 - 00:17:25 ART
Here is my scenarion, SW4 is attempting to ping group joined by BB1:
multicast domain 1 multicast domain 2:
[BB1--->R1--->R5--->R7] --- [R8---SW3---SW4]
R1 is the RP for domain 1.
R8 is the RP for domain 2.
R1 and R8 are MSDP peers and the peer connections are UP:
BB1 is joined to group 225.0.0.25
SW4 is the sender to 225.0.0.25.
R7 and R8 are PIM enabled on their connected interfaces but are NOT PIM
neighbors. Otherwise, it would be one big domain.
I'm gonna spoil my last mail by showing every 99th ping is successful:
Cat3560-4#ping 225.0.0.25 re 1000
Type escape sequence to abort.
Sending 1000, 100-byte ICMP Echos to 225.0.0.25, timeout is 2 seconds:
..................................................................
Reply to request 66 from 100.100.100.100, 17
ms..........................................................................................
Reply to request 157 from 100.100.100.100, 17
ms..........................................................................................
Reply to request 248 from 100.100.100.100, 17
ms..........................................................................................
Reply to request 339 from 100.100.100.100, 16
ms..........................................................................................
Reply to request 430 from 100.100.100.100, 16
ms..........................................................................................
Reply to request 521 from 100.100.100.100, 17
ms........................................
I have noticed the mroute entry on R8 is timing out. 150.100.34.14 is the
address of SW4's sending interface.
R8#show ip mroute 225.0.0.25 | Beg \*
(*, 225.0.0.25), 00:18:09/stopped, RP 200.0.0.8, flags: SP
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list: Null
(150.100.34.14, 225.0.0.25), 00:02:56/00:00:03, flags: PA
Incoming interface: FastEthernet0/1, RPF nbr 150.100.81.13
Outgoing interface list: Null
When this entry times out, I switch to SW4 and the ping is good one time
only. Then the entry is populated again immediately and the OIL becomes
NULL. I turned off SPT switchover on all routers with "ip pim spt-threshold
infinity"
Any ideas?
thanks,
Blogs and organic groups at http://www.ccie.net
This archive was generated by hypermail 2.1.4 : Sat Nov 01 2008 - 15:35:18 ARST