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Can't set Multicast MAC address on Catalyst 3524XL

Dear All,

I can not set Multicast MAC address (Unicast IP) on Catalyst 3524XL running c3500XL-c3h2s-mz-120.5.2-XU.bin.

I need to direct certain Multicast MAC Address (Unicast IP) to be forwarded to trunk port only so it will not interupt other servers in the same switch.

After some investigations, I found out that after I set Multicast MAC address, the switching stop forward my packet to that port with no reason.

Have someone experience this problem?? How to slove it?? Please advise.

Best Regards,

Navasil T

PS. We are using Multicast MAC address as the gateway MAC address with unicast IP


Re: Can't set Multicast MAC address on Catalyst 3524XL

Since there has been no response to your post, it appears to be either too complex or too rare an issue for other forum members to assist you. If you don't get a suitable response to your post, you may wish to review our resources at the online Technical Assistance Center ( or speak with a TAC engineer. You can open a TAC case online at

If anyone else in the forum has some advice, please reply to this thread.

Thank you for posting.

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