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Switchport block unicast

Hi,

What are the drawbacks of enabling this command on a port? Will it help prevent unicast flooding?

Thanks.

1 REPLY
VIP Super Bronze

Re: Switchport block unicast

Roselyn,

Unknown unicast traffic is flooded to all Layer 2 ports in a VLAN. You can use the UUFB and UUFRL

features to prevent or limit this traffic

http://www.cisco.com/en/US/docs/ios/interface/command/reference/ir_s7.html#wp1013145

HTH

Reza

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