Technical Documentation

show interfaces (Virtual Loopback Tunnel)

Syntax

show interfaces vt-fpc/pic/port <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 virtual loopback tunnel interface.

Options

vt-fpc/pic/port: Display standard information about the specified virtual loopback tunnel interface.
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.

Required Privilege Level

view

List of Sample Output

show interfaces (Virtual Loopback Tunnel)
show interfaces brief (Virtual Loopback Tunnel)
show interfaces detail (Virtual Loopback Tunnel)
show interfaces extensive (Virtual Loopback Tunnel)

Output Fields

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

Table 1: Virtual Loopback 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
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, Output bytes—Number of bytes received and transmitted on the interface. Input packets, Output packets—Number of packets received and transmitted on the interface.	detail extensive
Logical Interface
Logical interface	Name of the logical interface.	All levels
Index	Logical interface index number, which reflects its initialization sequence.	detail extensive none
SNMP ifIndex	Logical interface SNMP interface index number.	detail extensive none
Generation	Unique number for use by Juniper Networks technical support only.	detail extensive
Flags	Information about the logical interface. Possible values are described in the “Interface Flags” section under Common Output Fields Description.	All levels
Encapsulation	Encapsulation on the logical interface.	All levels
Input packets	Number of packets received on the logical interface.	None specified
Output packets	Number of packets transmitted on the logical interface.	None specified
Bandwidth	Bandwidth allotted to the logical interface, in kilobytes per second.	All levels
Traffic statistics	Total number of bytes and packets received and transmitted on the logical interface. These statistics are the sum of the local and transit statistics. When a burst of traffic is received, the value in the output packet rate field might briefly exceed the peak cell rate. It takes awhile (generally, less than 1 second) for this counter to stabilize. 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.	detail extensive
Transit statistics	Statistics for traffic transiting the router. When a burst of traffic is received, the value in the output packet rate field might briefly exceed the peak cell rate. It takes awhile (generally, less than 1 second) for this counter to stabilize.	detail extensive
protocol-family	Protocol family configured on the logical interface. Possible values are described in the “Family Flags” section under Common Output Fields Description.	brief
Protocol	Protocol family configured on the logical interface. Possible values are described in the “Family Flags” section under Common Output Fields Description.	detail extensive none
MTU	Maximum transmission unit size on the logical interface.	detail extensive none
Maximum labels	Maximum number of MPLS labels configured for the MPLS protocol family on the logical interface.	detail extensive none
Generation	Unique number for use by Juniper Networks technical support only.	detail extensive
Route Table	Routing table in which the logical interface address is located. For example, 0 refers to the routing table inet.0.	detail extensive
Flags	Information about protocol family flags. Possible values are described in the “Family Flags” section under Common Output Fields Description.	detail extensive none

Sample Output

show interfaces (Virtual Loopback Tunnel)

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

Physical interface: vt-1/2/0, Enabled, Physical link is Up
  Interface index: 144, SNMP ifIndex: 40
  Type: Loopback, Link-level type: Virtual-loopback-tunnel, MTU: Unlimited,
  Speed: 800mbps
  Device flags   : Present Running
  Input rate     : 0 bps (0 pps)
  Output rate    : 0 bps (0 pps)

  Logical interface vt-1/2/0.0 (Index 76) (SNMP ifIndex 57)
    Flags: Point-To-Point 16384 Encapsulation: Virtual-loopback-tunnel
  Input packets : 0
  Output packets: 0
    Protocol inet, MTU: Unlimited
      Flags: None
    Protocol mpls, MTU: Unlimited, Maximum labels: 3
      Flags: None

show interfaces brief (Virtual Loopback Tunnel)

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

Physical interface: vt-1/2/0, Enabled, Physical link is Up
  Type: Loopback, Link-level type: Virtual-loopback-tunnel, MTU: Unlimited,
  Speed: 800mbps
  Device flags   : Present Running

  Logical interface vt-1/2/0.0
    Flags: Point-To-Point 16384 Encapsulation: Virtual-loopback-tunnel
    inet
    mpls

show interfaces detail (Virtual Loopback Tunnel)

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

Physical interface: vt-1/2/0, Enabled, Physical link is Up
  Interface index: 144, SNMP ifIndex: 40, Generation: 27
  Type: Loopback, Link-level type: Virtual-loopback-tunnel, MTU: Unlimited,
  Speed: 800mbps
  Hold-times     : Up 0 ms, Down 0 ms
  Device flags   : Present Running
  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

  Logical interface vt-1/2/0.0 (Index 76) (SNMP ifIndex 57) (Generation 17)
    Flags: Point-To-Point 16384 Encapsulation: Virtual-loopback-tunnel
    Traffic statistics:
     Input  bytes  :                    0
     Output bytes  :                    0
     Input  packets:                    0
     Output packets:                    0
    Transit statistics:
     Input  bytes  :                    0                    0 bps
     Output bytes  :                    0                    0 bps
     Input  packets:                    0                    0 pps
     Output packets:                    0                    0 pps
    Protocol inet, MTU: Unlimited, Generation: 33, Route table: 0
      Flags: None
    Protocol mpls, MTU: Unlimited, Maximum labels: 3, Generation: 34, Route table: 0
      Flags: None

show interfaces extensive (Virtual Loopback Tunnel)

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

Physical interface: vt-1/2/0, Enabled, Physical link is Up
  Interface index: 144, SNMP ifIndex: 40, Generation: 27
  Type: Loopback, Link-level type: Virtual-loopback-tunnel, MTU: Unlimited,
  Speed: 800mbps
  Hold-times     : Up 0 ms, Down 0 ms
  Device flags   : Present Running
  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

  Logical interface vt-1/2/0.0 (Index 76) (SNMP ifIndex 57) (Generation 17)
    Flags: Point-To-Point 16384 Encapsulation: Virtual-loopback-tunnel
    Traffic statistics:
     Input  bytes  :                    0
     Output bytes  :                    0
     Input  packets:                    0
     Output packets:                    0
    Transit statistics:
     Input  bytes  :                    0                    0 bps
     Output bytes  :                    0                    0 bps
     Input  packets:                    0                    0 pps
     Output packets:                    0                    0 pps
    Protocol inet, MTU: Unlimited, Generation: 33, Route table: 0
      Flags: None
    Protocol mpls, MTU: Unlimited, Maximum labels: 3, Generation: 34, Route table: 0
      Flags: None