L2 frame control

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Hello

Basically Cisco Routers and Switches can control L2 frame such as CDP , STP etc.

As you know PACL can permit or deny on input interface however is it possible to use other technic?

This is for example, one Switch uses Flexlink and if primary link goes down,

then Frames related to this can be generated from secondary link , then I would like to filter them.(output)

Best Regards,

Masanobu Hiyoshi

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