Manual

Layer 2 Tunnel Protocol Version 3
show l2tun tunnel
140
Cisco IOS Releases 12.0(29)S and 12.2(25)S
The following example shows how to filter information to display L2TP control channel details only for
the sessions configured with the local name Router and the remote name tun1:
Router# show l2tun tunnel transport local-name Router tun1
Tunnel Information Total tunnels 3 sessions 3
LocID Type Prot Local Address Port Remote Address Port
26515 IP 115 172.18.184.116 0 172.18.184.142 0
Remote tunnel name The name of the remote tunnel endpoint.
Internet Address IP address of the remote tunnel endpoint.
port Port number used by the remote tunnel endpoint.
Local tunnel name The name of the local tunnel endpoint.
Internet Address IP address of the local tunnel endpoint.
port Port number used by the local tunnel endpoint.
Tunnel domain is Domain information for the tunnel.
VPDN group for
tunnel is
Name of the virtual private dialup network (VPDN) group associated with the
tunnel.
packets sent, received Number of packets sent and received since the tunnel was established.
bytes sent, received Number of bytes sent and received since the tunnel was established.
Control Ns, Nr Sequence number for control packets sent, received.
Local RWS Local receiving window size, in packets.
Remote RWS Remote receiving window size, in packets.
Tunnel PMTU
checking
Status of the tunnel PMTU checking option. It may be enabled or disabled.
Retransmission time,
max
Current time, in seconds, required to resend a packet and maximum time, in
seconds, that was required to resend a packet since tunnel establishment.
Unsent queuesize,
max
Current size of the unsent queue and maximum size of the unsent queue since
tunnel establishment.
Resend queuesize,
max
Current size of the resend queue and maximum size of the resend queue since
tunnel establishment.
Total resends Total number of packets re-sent since tunnel establishment.
ZLB ACKs sent Number of zero length body acknowledgment messages sent.
Current nosession
queue check
Number of tunnel timeout periods since the last session ended. Up to five
tunnel timeouts are used if there are outstanding control packets on the unsent
or resend queue. Otherwise, the tunnel is dropped after one tunnel timeout.
Retransmit time
distribution:
Histogram showing the number of retransmissions at 0, 1, 2,..., 8 seconds,
respectively.
Sessions disconnected
due to lack of
resources
Number of sessions disconnected due to a lack of available resources.
Table 11 show l2tun tunnel all Field Descriptions (continued)
Field Description