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dot1 tunnelled VLAN via L2TPv3 IP routed enviroment problem

I have an objective to transparently interconnect two Cat 6506 switches using dot1q trunk via ethernet switched and IP routed enviroment.

6506 trunk - 3560 dot1q tunnel via vlan 2 - 7206 terminating vlan 2 and xconnect to neighbor 7206 - 3560 with vlan 2/dot1q tunnel - 6506 trunk.

I've divided problem to 2 possible stages - QinQ and L2TPv3.

Realized QinQ works well by assigning/pinging first 7206 IP terminating dot1q tunnel.

Now I have tunnel up, dynamically negotiated with ip mtu, ip sequencing both etc, all default, but I only see sent bytes at first 7206 and no received and received/no sent bytes at the second 7206.

So it actually looks like bytes go just via one direction, from 1 7206 to 2 7206 and not the opposite direction.

What are these counters for? Only for tunneled VLAN or whole L2TPv3 tunnel? Cos hellos should create both traffic sent and received on both 72xx's.

I am confused and can't ping/trunk from the remote 3560. It's under ISP responcibility.I also cant SPAN/VSPAN for some reason to ethereal/analyze it.

Any gurus?

  • Getting Started with LANs
1 REPLY
Bronze

Re: dot1 tunnelled VLAN via L2TPv3 IP routed enviroment problem

Counters indicate total packets sent and receive for the current session.Sometimes MTU sizes could be a reason for the tunnel not working.Refer URL for configuring MTU forhttp://www.cisco.com/en/US/customer/tech/tk801/tk703/technologies_tech_note09186a0080094c4f.shtml#frag_example

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