Multicast issue and help needed

Answered Question
Mar 2nd, 2007

I have configured multicast between two sites running two Cisco 2600 router over T1 and Cisco 2948 switches behind them. I'm runing weblogic multicast with the TTL of 2 or higher. I see multicast on one end but the other end shows nothing.

My interface config look like this

interface FastEthernet0/0.3

encapsulation dot1Q 103

ip address 192.168.216.1 255.255.255.128

ip pim sparse-dense-mode

no ip route-cache

no ip mroute-cache

My other end is .129/25 and I have cgmp enabled on Cisco 2948.

Is there anything I'm missing in the configuration? Please advice.

I have this problem too.
0 votes
Correct Answer by Harold Ritter about 9 years 7 months ago

Silly question but have you configured PIM on the serail link between the two sites?

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Harold Ritter Fri, 03/02/2007 - 06:44

It is hard to comment with so little info. Did you configure a static RP or auto-RP? Can you attach the output of a show ip mroute" from the router ar the site that doesn't receive the multicast packets.

Cheers,

nawas Fri, 03/02/2007 - 06:49

Yes

Non Working router:--

Exec-2620-HB#sh ip mroute

IP Multicast Routing Table

Flags: D - Dense, S - Sparse, 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 - Candidate for MSDP Advertisement

Outgoing interface flags: H - Hardware switched

Timers: Uptime/Expires

Interface state: Interface, Next-Hop or VCD, State/Mode

(*, 224.0.1.40), 1d00h/00:00:00, RP 0.0.0.0, flags: DJCL

Incoming interface: Null, RPF nbr 0.0.0.0

Outgoing interface list:

FastEthernet0/0.3, Forward/Sparse-Dense, 1d00h/00:00:00

Working Router:--

dc-3620-Hb#sh 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 - Candidate for MSDP Advertisement,

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

(*, 237.0.0.96), 20:52:57/00:02:59, RP 0.0.0.0, flags: DC

Incoming interface: Null, RPF nbr 0.0.0.0

Outgoing interface list:

FastEthernet0/0.3, Forward/Sparse-Dense, 20:52:57/00:00:00

(192.168.216.4, 237.0.0.96), 00:02:59/00:00:00, flags: PCT

Incoming interface: FastEthernet0/0.3, RPF nbr 0.0.0.0

Outgoing interface list: Null

(192.168.216.5, 237.0.0.96), 00:00:39/00:02:20, flags: PCT

Incoming interface: FastEthernet0/0.3, RPF nbr 0.0.0.0

Outgoing interface list: Null

(*, 224.0.1.40), 1d00h/00:00:00, RP 0.0.0.0, flags: DCL

Incoming interface: Null, RPF nbr 0.0.0.0

Outgoing interface list:

FastEthernet0/0.3, Forward/Sparse-Dense, 1d00h/00:00:0

Correct Answer
Harold Ritter Fri, 03/02/2007 - 06:55

Silly question but have you configured PIM on the serail link between the two sites?

nawas Fri, 03/02/2007 - 07:32

Not a silly question because this is something I missed. It now works when enabled on serial interface. Thanks a lot

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