# Monitoring Global Configuration Status on E Series Routers

#### Purpose

Display the global configuration and status for L2TP on E Series routers, including switched sessions.

#### Action

To display the global configuration and status for L2TP on E Series routers, including switched sessions:

    host1#show l2tp
    Configuration
      L2TP administrative state is enabled
      Dynamic interface destruct timeout is 600 seconds
      Data packet checksums are disabled
      Receive data sequencing is not ignored
      Tunnel switching is disabled
      Retransmission retries for established tunnels is 5
      Retransmission retries for not-established tunnels is 5
      Tunnel idle timeout is 60 seconds
      Failover within a preference level is disabled
      Weighted load balancing is disabled
      Tunnel authentication challenge is enabled
      Calling number avp is enabled
      Reject remote transmit address change is enabled for ip address
      Ignore remote transmit address change is disabled
      Disconnect-cause avp generation is enabled
      Default receive window size is system chooses
      Rx speed avp when equal is enabled
      Destination lockout timeout is 300 seconds
      Destination lockout test is disabled
      Failover resync is silent-failover
    Sub-interfaces      total      active     failed     auth-errors
      Destinations      0          0          0          n/a
      Tunnels           0          0          0          0
      Sessions          0          0          0          n/a
      Switched-sessions 0          0          0          n/a

#### Meaning

Table 85 lists the show l2tp command output fields.

Table 85: show l2tp Output Fields

Field Name | Field Description
--- | ---
Configuration | Configuration and status for L2TP on E Series routers, including switched sessions
L2TP administrative state | Status of L2TP on the router; enabled or disabled
Dynamic interface destruct timeout | Number of seconds that the router maintains dynamic destinations, tunnels, and sessions after they have terminated
Data packet checksums | Status of checking data integrity via UDP; enabled or disabled
Receive data sequencing | Whether the router processes or ignores sequence numbers in incoming data packets
Tunnel switching | Enabled or disabled
Retransmission retries for established tunnels | Number of retries configured for established tunnels
Retransmission retries for not-established tunnels | Number of retries configured for tunnels not established
Tunnel idle timeout | Length of the tunnel idle timeout, in seconds
Failover within a preference level | Enabled or disabled
Weighted load balancing | Enabled or disabled
Tunnel authentication challenge | Enabled or disabled
Calling number avp | Whether the E Series LAC sends Calling-Station-Id and Called-Station-Id AVPs in ICRQ packets, enabled or disabled
Reject remote transmit address change | Enabled or disabled for IP address, UDP port, or both
Ignore remote transmit address change | Enabled or disabled for IP address, UDP port, or both
Disconnect-cause avp generation | Enabled or disabled
Default receive window size | Default L2TP RWS for a tunnel on both the LAC and the LNS; displays either the configured value or the default behavior, indicated by system chooses
Rx speed avp when equal | Enabled or disabled
Destination lockout timeout | Number of seconds that L2TP destinations remain in the lockout state after they become unavailable
Destination lockout test | Status of the L2TP destination lockout test, enabled or disabled
Failover resync | Global L2TP peer resynchronization configuration
Sub-interfaces | Sub-interface information about L2TP
total | Number of destinations, tunnels, and sessions that the router created
active | Number of operational destinations, tunnels, and sessions
failed | Number of requests that did not reach an operational state
auth-errors | Number of requests that failed because the tunnel password was invalid

#### Related Documentation

- show l2tp