From: Annu Roopa (annu_roopa@yahoo.com)
Date: Wed Oct 22 2003 - 15:51:14 GMT-3
Group,
Here i have a problem which i am unable to troubleshoot. Dont know why its happening.The case is exactly like Doyle 2 case with Platinum--lead--iron-brass .
The issue is for some reson R11 does not switch back to Shared tree even with ip spt thereshold-infinity set on R11.
Without this command the traffic path to R11 is via the RP(r7) but switches to SPT once the link between R11 and R10 (Serial0) comes up. the routing table swithes to use R7-R4 to get to R10 but the show ip mroute does not change.
Setup:Same IP addresses as Doyle 2.
Source --------| R10 -------------R4
| |
| |
s1 | |
R11---------------r7---------- R6 ------------ r15
| s0 (RP)
|
--------+----------
Rx on this Lan
Here are the configs and route table:
R11#show ip mroute
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected,
L - Local, P - Pruned, R - RP-bit set, F - Register flag,
T - SPT-bit set, J - Join SPT, M - MSDP created entry,
X - Proxy Join Timer Running, A - Advertised via MSDP, U - URD,
I - Received Source Specific Host Report
Outgoing interface flags: H - Hardware switched
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode
(*, 236.82.134.23), 00:09:15/00:00:00, RP 172.16.224.1, flags: SCL
Incoming interface: Serial0, RPF nbr 172.16.2.254
Outgoing interface list:
Ethernet0, Forward/Sparse, 00:07:09/00:02:18
(172.16.1.1, 236.82.134.23), 00:06:36/00:02:42, flags: CLT
Incoming interface: Serial1, RPF nbr 0.0.0.0 <<<<< use the SPT
Outgoing interface list:
Ethernet0, Forward/Sparse, 00:06:36/00:02:18
(*, 224.0.1.40), 00:09:15/00:00:00, RP 172.16.224.1, flags: SPCL
Incoming interface: Serial0, RPF nbr 172.16.2.254
Outgoing interface list: Null
R11#i
172.16.0.0/16 is variably subnetted, 10 subnets, 2 masks
C 172.16.2.252/30 is directly connected, Serial0
C 172.16.2.248/30 is directly connected, Serial1
C 172.16.11.0/24 is directly connected, Ethernet0
R 172.16.1.0/24 [120/1] via 172.16.2.250, 00:00:16, Serial1
R 172.16.3.0/24 [120/3] via 172.16.2.254, 00:00:16, Serial0 <<<< shows RPT being the path
R11 config:
!
interface Serial0
ip address 172.16.2.253 255.255.255.252
ip pim sparse-mode
no fair-queue
clockrate 64000
!
interface Serial1
ip address 172.16.2.249 255.255.255.252
ip pim sparse-mode
clockrate 64000
!
router rip
version 2
network 172.16.0.0
no auto-summary
ip pim rp-address 172.16.224.1
ip pim spt-threshold infinity <<<< this should allow the Shortest PT to be used.
Dont know what is happening ?
Thanks in advance for ur time and replies.
Annu.
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This archive was generated by hypermail 2.1.4 : Mon Nov 24 2003 - 07:53:06 GMT-3