Monitoring Detailed Configuration Information about Specified Tunnels

Purpose

Display detailed configuration information about specified tunnels.

Action

To display detailed configuration information about specified tunnel by IP address:

Note: For L2TP tunnels configured with output IPv4 or IPv6 policy lists, the output of the show ip interface tunnel l2tp:tunnel-name and the show ipv6 interface tunnel l2tp:tunnel-name commands display only the forwarded packets and bytes fields, and the dropped packets and bytes fields in the rate-limit-profile section for policies with hierarchical parent groups under the IP policy output or IPv6 policy output headings, respectively, when scheduler profile–based computation of service session accounting is enabled. In such a case, the committed, conformed, exceeded, saturated, and unconditional packets and bytes fields are not displayed in the rate-limit-profile section in the output of these commands for policies with hierarchical parent groups.

host1#show l2tp tunnel virtual router default ip 172.31.1.98
L2TP tunnel 1/xyz is Up with 13 active sessions 
L2TP tunnel 1/aol.com is Up with 13 active sessions
L2TP tunnel 1/isp.com is Up with 13 active sessions
L2TP tunnel 1/msn.com is Up with 13 active sessions
L2TP tunnel 1/mv.com is Up with 12 active sessions
5 L2TP tunnels found

To display detailed configuration information about specified tunnel:

host1#show l2tp tunnel detail 1/xyz 
L2TP tunnel 1/xyz is Up with 13 active sessions
Configuration
  Administrative state is enabled
  SNMP traps are enabled
Tunnel address
  Transport ipUdp
  Virtual router default
  Local address 192.168.1.230, peer address 172.31.1.98
  Local UDP port 1701, peer UDP port: 1701 Tunnel status
  Effective administrative state is enabled
  State is established
  Local tunnel id is 14529, peer tunnel id is 34
  Host profile is none
  Tunnel is Up for: 12 days, 8 hours, 24 minutes, 23 seconds
Sub-interfaces    total   active   failed
  Sessions        13      13       0
Statistics    packets      octets       discards   errors
  Control rx  14           683          0          0
  Control tx  41           4666         0          0
  Data rx     67900944     67900944     0          0
  Data tx     67900944     67900944     0          0
Control channel statistics
  Receive window size = 4
  Receive ZLB = 17
  Receive out-of-sequence = 0
  Receive out-of-window = 0
  Transmit window size = 4
  Transmit ZLB = 12
  Transmit queue depth = 0
  Retransmissions = 8 Tunnel operational configuration
  Peer host name is 'Juniper-POS'
  Peer vendor name is 'XYZ, Inc.'
  Peer protocol version is 1.1
  Peer firmware revision is 0x1120
  Peer bearer capabilities are digital and analog
  Peer framing capabilities are sync and async

Meaning

 Table 101 lists the show l2tp tunnel command output fields.

Table 101: show l2tp tunnel Output Fields

Field Name

Field Description

Configuration

Configured status of the tunnel enabled.

Administrative state

Administrative status of the enabled tunnel:

  • enabled—No restrictions on creation and operation of sessions for this tunnel
  • disabled—Router disabled existing sessions and will not create new sessions on this tunnel
  • drain—Router will not create new sessions on this tunnel

SNMP traps

Whether or not the router sends traps to SNMP for operational state changes.

Tunnel address

Tunnel address information.

Transport

Method used to transfer traffic.

Virtual router

Name of the virtual router on which the tunnel is configured.

Local and peer addresses

IP addresses of the local and remote ends of the tunnel. If the router is set up to ignore address and port changes in SCCRP packets, both the transmit and receive addresses are listed for the peer.

Local and peer UDP ports

UDP ports for the local and remote ends of the tunnel. If the router is set up to accept address and port changes in SCCRP packets, both the transmit and receive UDP ports are listed for the peer.

Tunnel status

Tunnel status information.

Effective administrative state

Most restrictive of the following administrative states: E Series router, destination, and tunnel. This setting, rather than the administrative state of the tunnel, determines whether the router can create new sessions on a tunnel or whether the sessions on a tunnel are disabled or not.

State

Status of the enabled tunnel:

  • idle
  • connecting
  • established
  • disconnecting

Local and peer tunnel id

Names the router used to identify the tunnel locally and remotely.

Host profile

Name of the L2TP host profile, if it is configured. Otherwise, the label “none” is displayed to specify that a host profile is not enabled.

Tunnel is Up for

Duration for which the tunnel is operationally up, which is denoted in terms of days, hours, minutes, and seconds.

Sub-interfaces:

Sub-interface information for the enabled tunnel:

  • total—Number of sessions that the router has created on this tunnel
  • active—Number of operational sessions on the tunnel
  • failed—Number of requests that did not reach an operational state

Statistics

Information about the traffic sent and received.

Control channel statistics

Tunnel control channel information.

Receive window size

Number of packets that the peer can transmit without receiving an acknowledgment from the router.

Receive ZLB

Number of acknowledgments that the router has received from the peer.

Receive out-of-sequence

Number of received control packets that were out of order.

Receive out-of-window

Number of packets that arrived at the router outside the receiving window.

Transmit window size

Number of packets that the router can transmit before receiving an acknowledgment from the peer.

Transmit ZLB

Number of acknowledgments that the router has sent to the peer.

Transmit queue depth

Number of packets that the router is waiting to send to the peer, plus the number of packets for which the peer has not yet acknowledged receipt.

Tunnel operation configuration

Information received from the peer when the tunnel was created.

Related Documentation