Technical Documentation

show interfaces (Multicast Tunnel)

Syntax

show interfaces interface-type<brief | detail | extensive | terse><descriptions><media><snmp-index snmp-index><statistics>

Release Information

Command introduced before Junos OS Release 7.4.

Description

Display status information about the specified multicast tunnel interface and its logical encapsulation and de-encapsulation interfaces.

Options

interface-type: On M Series and T Series routers, the interface type is mt-fpc/pic/port. On J Series routers, the interface type is mt-pim/0/port.
brief | detail | extensive | terse: (Optional) Display the specified level of output.
descriptions: (Optional) Display interface description strings.
media: (Optional) Display media-specific information about network interfaces.
snmp-index snmp-index: (Optional) Display information for the specified SNMP index of the interface.
statistics: (Optional) Display static interface statistics.

Additional Information

The multicast tunnel interface has two logical interfaces: encapsulation and de-encapsulation. These interfaces are automatically created by the Junos OS for every multicast-enabled VPN routing and forwarding (VRF) instance. The encapsulation interface carries multicast traffic traveling from the edge interface to the core interface. The de-encapsulation interface carries traffic coming from the core interface to the edge interface.

Required Privilege Level

view

List of Sample Output

show interfaces (Multicast Tunnel)
show interfaces brief (Multicast Tunnel)
show interfaces detail (Multicast Tunnel)
show interfaces extensive (Multicast Tunnel)
show interfaces (Multicast Tunnel Encapsulation)
show interfaces (Multicast Tunnel De-Encapsulation)

Output Fields

Table 1 lists the output fields for the show interfaces (Multicast Tunnel) command. Output fields are listed in the approximate order in which they appear.

Table 1: Multicast Tunnel show interfaces Output Fields

Field Name	Field Description	Level of Output
Physical Interface
Physical interface	Name of the physical interface.	All levels
Enabled	State of the interface. Possible values are described in the “Enabled Field” section under Common Output Fields Description.	All levels
Interface index	Physical interface's index number, which reflects its initialization sequence.	detail extensive none
SNMP ifIndex	SNMP index number for the physical interface.	detail extensive none
Generation	Unique number for use by Juniper Networks technical support only.	detail extensive
Type	Type of interface.	All levels
Link-level type	Encapsulation used on the physical interface.	All levels
MTU	MTU size on the physical interface.	All levels
Speed	Speed at which the interface is running.	All levels
Hold-times	Current interface hold-time up and hold-time down, in milliseconds.	detail extensive
Device flags	Information about the physical device. Possible values are described in the “Device Flags” section under Common Output Fields Description.	All levels
Interface flags	Information about the interface. Possible values are described in the “Interface Flags” section under Common Output Fields Description.	All levels
Input Rate	Input rate in bits per second (bps) and packets per second (pps).	None specified
Output Rate	Output rate in bps and pps.	None specified
Statistics last cleared	Time when the statistics for the interface were last set to zero.	detail extensive
Traffic statistics	Number and rate of bytes and packets received and transmitted on the physical interface. Input bytes—Number of bytes received on the interface. Output bytes—Number of bytes transmitted on the interface. Input packets—Number of packets received on the interface. Output packets—Number of packets transmitted on the interface.	All levels

Sample Output

show interfaces (Multicast Tunnel)

user@host> show interfaces mt-1/2/0

Physical interface: mt-1/2/0, Enabled, Physical link is Up
  Interface index: 145, SNMP ifIndex: 41
  Type: Multicast-GRE, Link-level type: GRE, MTU: Unlimited, Speed: 800mbps
  Device flags   : Present Running
  Interface flags: SNMP-Traps
  Input rate     : 0 bps (0 pps)
  Output rate    : 0 bps (0 pps)

show interfaces brief (Multicast Tunnel)

user@host> show interfaces mt-1/2/0 brief

Physical interface: mt-1/2/0, Enabled, Physical link is Up
  Type: Multicast-GRE, Link-level type: GRE, MTU: Unlimited, Speed: 800mbps
  Device flags   : Present Running
  Interface flags: SNMP-Traps

show interfaces detail (Multicast Tunnel)

user@host> show interfaces mt-1/2/0 detail

Physical interface: mt-1/2/0, Enabled, Physical link is Up
  Interface index: 145, SNMP ifIndex: 41, Generation: 28
  Type: Multicast-GRE, Link-level type: GRE, MTU: Unlimited, Speed: 800mbps
  Hold-times     : Up 0 ms, Down 0 ms
  Device flags   : Present Running
  Interface flags: SNMP-Traps
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :                    0                    0 bps
   Output bytes  :                    0                    0 bps
   Input  packets:                    0                    0 pps
   Output packets:                    0                    0 pps

show interfaces extensive (Multicast Tunnel)

user@host> show interfaces mt-1/2/0 extensive

Physical interface: mt-1/2/0, Enabled, Physical link is Up
  Interface index: 145, SNMP ifIndex: 41, Generation: 28
  Type: Multicast-GRE, Link-level type: GRE, MTU: Unlimited, Speed: 800mbps
  Hold-times     : Up 0 ms, Down 0 ms
  Device flags   : Present Running
  Interface flags: SNMP-Traps
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :                    0                    0 bps
   Output bytes  :                    0                    0 bps
   Input  packets:                    0                    0 pps
   Output packets:                    0                    0 pps

show interfaces (Multicast Tunnel Encapsulation)

user@host> show interfaces mt-3/1/0.32768

Logical interface mt-3/1/0.32768 (Index 67) (SNMP ifIndex 0) 
    Flags: Point-To-Point SNMP-Traps 0x4000
    IP-Header 239.1.1.1:10.255.70.15:47:df:64:0000000800000000
    Encapsulation: GRE-NULL
  Input packets : 0
  Output packets: 2
    Protocol inet, MTU: Unlimited
      Flags: None

show interfaces (Multicast Tunnel De-Encapsulation)

user@host> show interfaces mt-3/1/0.49152

Logical interface mt-3/1/0.49152 (Index 74) (SNMP ifIndex 0) 
    Flags: Point-To-Point SNMP-Traps 0x6000 Encapsulation: GRE-NULL
  Input packets : 0
  Output packets: 2
    Protocol inet, MTU: Unlimited
      Flags: None