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show amt tunnel



Display information about the Automatic Multicast Tunneling (AMT) dynamic tunnels.



Display summary information about all AMT protocol instances.

brief | detail

(Optional) Display the specified level of detail.

gateway-address gateway-ip-address port port-number

(Optional) Display information for the specified AMT gateway only. If no port is specified, display information for all AMT gateways with the given IP address.

instance instance-name

(Optional) Display information for the specified instance only.

logical-system (all | logical-system-name)

(Optional) Perform this operation on all logical systems or on a particular logical system.

tunnel-interface interface-name

(Optional) Display information for the specified AMT tunnel interface only.

Required Privilege Level


Output Fields

Table 1 describes the output fields for the show amt tunnel command. Output fields are listed in the approximate order in which they appear.

Table 1: show amt tunnel Output Fields

Field Name

Field Description

Level of Output

AMT gateway address

Address of the AMT gateway that is being connected by the AMT tunnel.

All levels


Client port used by the AMT tunnel.

All levels

AMT tunnel interface

Dynamically created AMT logical interfaces used by the AMT tunnel in the format ud-FPC/PIC/Port.unit.

All levels

AMT tunnel state

State of the AMT tunnel. The state is normally Active.

  • Active—The tunnel is active.

  • Pending—The tunnel creation is pending. This is a transient state.

  • Down—The tunnel is in the down state.

  • Graceful restart pending—Graceful restart is in progress.

  • Reviving—The routing protocol daemon or Routing Engine was restarted (not gracefully). The tunnel remains in the reviving state until the AMT gateway sends a control message. When the message is received the tunnel is moved to the Active state. If no message is received before the AMT tunnel inactivity timer expires, the tunnel is deleted.

All levels

AMT tunnel inactivity timeout

Number of seconds since the most recent control message was received from an AMT gateway. If no message is received before the AMT tunnel inactivity timer expires, the tunnel is deleted.

All levels

Number of groups

Number of multicast groups using the tunnel.

All levels


Multicast group address or addresses using the tunnel.


Include Source

Multicast source address for each IGMPv3 group using the tunnel.


AMT message count

Statistics for AMT messages:

  • AMT Request—Number of AMT relay tunnel request messages received.

  • AMT membership update—Number of AMT membership update messages received.

All levels

Sample Output

show amt tunnel

show amt tunnel detail

show amt tunnel tunnel-interface

show amt tunnel gateway-address

show amt tunnel gateway-address detail

Release Information

Command introduced in Junos OS Release 10.2.