intervlan multicast

Unanswered Question
May 2nd, 2008
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hi.

i'm having trouble setting up intervlan multicasting on a catalyst 4510R.


multicast within the same vlan works fine but after putting the source in a separate vlan i cannot get it to work.


ip multicast-routing is enabled

and ip pim sparse-mode is set on the vlans in question


i have tried dense-mode, adding an RP address. pretty much everything


i'm sure i've missed something simple as it doesn't seem that difficult a thing to set up!


could someone help me with the config?


thanks.

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Harold Ritter Fri, 05/02/2008 - 03:26
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  • Cisco Employee,

Mike,


A very common problem is that the source transmits using a TTL of 1, which will work if the source and the receiver are on a common subnet but won't if they are separated by one or more router.


Regards,

mikedelafield Fri, 05/02/2008 - 05:08
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good call on that one!! spot on


ttl was indeed set to 1.


ended up using ip pim sparse-mode and setting the RP-Address manually


thanks

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