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Hi Mike,
L2 re-learn can happen for a lot of different reasons.
Can you please share your topology where you are seeing this behavior.
-Randy
________________________________
From: Aaron1 <[email protected]>
To: Mike <[email protected]>
Cc: "[email protected]" <[email protected]>
Sent: Wednesday, October 17, 2018 3:28 PM
Subject: Re: [c-nsp] What causes mac table relearning?
You say you weren’t running spanning tree, but I thought topology change
notification bridge PDUs caused a Mac flush, I don’t know For sure
Aaron
> On Oct 17, 2018, at 4:32 PM, Mike <[email protected]>
> wrote:
>
> Hi,
>
>
> I have a network consisting of 3560g switches and I do not run spanning
> tree in this network. I have noticed a symptom when a vlan trunk interface
> goes down/up, all mac addresses in the vlans carried by that trunk also seem
> to be cleared at the same time. Im not just talking the mac addresses on the
> port itself; rather, across the other switches themselves , even for mac
> addresses that have no connection to the port itself they just happen to be
> in one of the vlans. If I have missed something fundamental I'd love to know
> but I am not aware of any lan switching rules that would require this
> behavior.
>
>
> Mike-
>
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