Multicast across vlans - Catalyst 6k

Unanswered Question
May 22nd, 2007

Hi all,


Is it possible to multicast from one public vlan to another?


Setup is:

!

ip multicast-routing

no ip igmp snooping

!

interface Vlan1

description multicast are running here

ip address 1.1.1.x.x.255.0

ip pim sparse-mode

ip igmp static-group 233.62.223.2

ip igmp version 3

ip igmp snooping fast-leave

end

!

interface Vlan2

description I want to watch my multicast stream ***

ip address 2.2.2.x.x.255.0

ip igmp join-group 233.62.223.2

ip igmp version 3

end

!


When i have an ip adress in vlan 1 I can connect fine to the multicast stream - but when I'm in vlan2 I cannot connect.


Regards,


Philip

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ankbhasi Tue, 05/22/2007 - 06:39

Hi Philip,


So you have multicast server on vlan 1 and you want to receive multicast traffic on vlan 2 correct?


Can you also configure "pim" under interface vlan 2 and see if that works?


Also can you paste the output of "sh ip mroute" once you configure pim under vlan 2?


Regards,


Ankur

Harold Ritter Tue, 05/22/2007 - 07:06

Also make sure the multicast source application generates the multicast stream with a TTL of at lease 2. Otherwise, the router will simply drop the packets.


Hope this helps,

benterry1210 Sat, 06/23/2007 - 03:30

Hi,


I too am having the exact problem. I have added PIM and join group (as per the application), but the vlans fail to see M/cast traffic between them.


Can anyone post some configs that will allow multicasting to work between separate vlans on a 6509 IOS device?


The sh ip mroute output is:-


*, 239.255.255.254), 03:55:19/00:02:51, RP 0.0.0.0, flags: DC

Incoming interface: Null, RPF nbr 0.0.0.0

Outgoing interface list:

Vlan193, Forward/Sparse, 03:55:19/00:00:00 (ttl-threshold 2)


*, 239.255.255.253), 03:55:18/00:02:50, RP 0.0.0.0, flags: DC

Incoming interface: Null, RPF nbr 0.0.0.0

Outgoing interface list:

Vlan193, Forward/Sparse, 03:55:18/00:00:00 (ttl-threshold 2)


*, 239.255.255.250), 03:55:19/00:02:51, RP 0.0.0.0, flags: DC

Incoming interface: Null, RPF nbr 0.0.0.0

Outgoing interface list:

Vlan101, Forward/Sparse, 03:53:58/00:02:49 (ttl-threshold 2)

Vlan193, Forward/Sparse, 03:55:19/00:00:00 (ttl-threshold 2)


*, 229.55.150.208), 03:55:18/00:02:49, RP 0.0.0.0, flags: DC

Incoming interface: Null, RPF nbr 0.0.0.0

Outgoing interface list:

Vlan101, Forward/Sparse, 02:21:04/00:02:49 (ttl-threshold 2)

Vlan193, Forward/Sparse, 03:55:18/00:00:00 (ttl-threshold 2)


*, 239.83.100.109), 02:21:15/00:02:49, RP 0.0.0.0, flags: DC

Incoming interface: Null, RPF nbr 0.0.0.0

Outgoing interface list:

Vlan101, Forward/Sparse, 02:21:15/00:02:49 (ttl-threshold 2)

Vlan193, Forward/Sparse, 02:21:15/00:00:00 (ttl-threshold 2)


*, 224.0.1.40), 03:55:19/00:02:48, RP 0.0.0.0, flags: DCL

Incoming interface: Null, RPF nbr 0.0.0.0

Outgoing interface list:

Vlan193, Forward/Sparse, 03:55:19/00:00:00 (ttl-threshold 2)


*, 224.0.1.60), 03:55:18/00:02:42, RP 0.0.0.0, flags: DC

Incoming interface: Null, RPF nbr 0.0.0.0

Outgoing interface list:

Vlan193, Forward/Sparse, 03:55:18/00:00:00 (ttl-threshold 2)


*, 234.5.6.7), 03:55:18/00:02:48, RP 0.0.0.0, flags: DC

Incoming interface: Null, RPF nbr 0.0.0.0

Outgoing interface list:

Vlan193, Forward/Sparse, 03:55:18/00:00:00 (ttl-threshold 2)


*, 224.0.1.24), 03:55:19/00:02:51, RP 0.0.0.0, flags: DC

Incoming interface: Null, RPF nbr 0.0.0.0

Outgoing interface list:

Vlan193, Forward/Sparse, 03:55:19/00:00:00 (ttl-threshold 2)


Many thanks

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