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Cat 3560 - blocking multicast traffic

jan.klicka
Beginner
Beginner

Hello,

we've Cat 3560 running IP Base image (switching only on L2), with several 802.1q trunks:

- 2 are connected to routers/firewalls

- others are connected to other L2 switches,

- each trunk contains over 40 Vlans

The routers/firewalls are "virtualized" using VRRP. I'l like to limit propagation of VRRP only to 3560, without flooding the information to other L2 switches. I tried to block the traffic (multicast IP address 224.0.0.18, MAC address 0100.5e00.0012) using

switchoport block multicast

or

mac-address-table static 0100.5e00.0012 vlan X interface A,B (A and B interfaces are the routers/firewalls)

but I didn't succeeded. Do you have any idea what to try?

Thanks

1 REPLY 1

thomas.chen
Frequent Contributor
Frequent Contributor

The better way is to do that is enable VTP Pruning nad stop these unnecessary VRRP messages. By default VTP pruning will be in disabled state.

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