Tunneling Technologies: L2TPv3

L2VPNs featured an expansion with the Layer 2 Tunneling Protocol version 3 feature.  L2TPv3 provides enhancements to L2TP to tunnel any L2Payload over L2tP by defining how L2TP tunnels L2 payloads over an IP core by using L2VPNs.

L2TPv3 uses protocol ID 115.

In order for L2TPv3 to work you must have CEF enabled and that the loopback interface has a valid IP address that is reachable from remote PE devices at the other end of an L2TPv3 control channel

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