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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:

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 
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 89 show l2tp
tunnel command output fields.



Table 89: 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








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








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