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show pim mdt



Display information about Protocol Independent Multicast (PIM) default multicast distribution tree (MDT) and the data MDTs in a Layer 3 VPN environment for a routing instance.


instance  instance-name

Display information about data-MDTs for a specific PIM-enabled routing instance.

brief | detail | extensive

(Optional) Display the specified level of output.


Show received PIM data-mdt-joins.


Show received PIM data-mdt-limits.

incoming | outgoing

(Optional) Display incoming or outgoing multicast data tunnels, respectively.

inet | inet6

Display IPv4 or IPv6 multicast data tunnels.

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

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


(Optional) Display information about an IP address with optional prefix length representing a particular multicast group.

Required Privilege Level


Output Fields

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

Table 1: show pim mdt Output Fields

Field Name

Field Description

Level of Output


Name of the routing instance.

All levels

Tunnel direction

Direction the tunnel faces, from the router's perspective: Outgoing  or Incoming.

All levels

Tunnel mode

Mode the tunnel is operating in: PIM-SSM  or PIM-ASM.

All levels

Default group address

Default multicast group address using this tunnel.

All levels

Default source address

Default multicast source address using this tunnel.

All levels

Default tunnel interface

Default multicast tunnel interface.

All levels

Default tunnel source

Address used as the source address for outgoing PIM control messages.

All levels


Customer-facing multicast group address using this tunnel. If you enable dynamic reuse of data MDT group addresses, more than one group address can use the same data MDT.



IP address of the multicast source in the customer's address space. If you enable dynamic reuse of data MDT group addresses, more than one source address can use the same data MDT.



Service provider-facing multicast group address using this tunnel.


Data tunnel interface

Multicast data tunnel interface that set up the data-MDT tunnel.


Last known forwarding rate

Last known rate, in kilobits per second, at which the tunnel was forwarding traffic.


Configured threshold rate

Rate, in kilobits per second, above which a data-MDT tunnel is created and below which it is deleted.


Tunnel uptime

Time that this data-MDT tunnel has existed. The format is hours:minutes:seconds.


Sample Output

show pim mdt <variables> instance

Use this command to display MDT information for default MDT and data-MDT for IPv4 and/or IPv6 traffic. )

show pim mdt instance detail

show pim mdt instance extensive

show pim mdt instance incoming

show pim mdt instance outgoing

show pim mdt instance (SSM Mode)

Release Information

Command introduced before Junos OS Release 7.4.

Support for IPv6 added in Junos OS Release 17.3R1.