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What happens to L2 Protocols when a tunnel is not terminated?

Howdy, I have a quick questioning that I can not seem to find an answer to.

If I have a UNI port that is configured for dot1q tunneling, and the other side of the circuit is not, what happens to the layer 2 protocol packets? If L2P packets get encapsulated when do they get de-encapsulated if the tunneling command is not on the remote end? Do they just get dropped?

Test topology

CustomerDevice-----------NID(dot1q tunnel)--------Router(IP interface into a private l3vpn)

Thanks.

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Frequent Contributor

Re: What happens to L2 Protocols when a tunnel is not terminated?

Hi Shane,

This question might be better to post in the Cisco Support Community. I see there is some discussion going on over there about Layer 3 Protocols. Not sure it this is relevant to you, but it might be a good place to start.

Solved: Tunneling VLAN though L3 - Cisco Support Community

Thanks!

Greg Rose

Cisco Community Manager

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