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show interfaces (Discard)

date_range 19-Nov-23

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Syntax

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

Description

Display status information about the specified discard interface.

Options

dsc	Display standard information about the specified discard interface.
brief \| detail \| extensive \| terse	(Optional) Display the specified level of output.
descriptions	(Optional) Display interface description strings.
media	This option is not relevant for the discard interface and always shows a value of 0.
snmp-index `snmp-index`	(Optional) Display information for the specified SNMP index of the interface.
statistics	(Optional) This option is not relevant for the discard interface and always shows a value of 0.

Required Privilege Level

view

Output Fields

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

Table 1: Discard show interfaces Output Fields
Field Name	Field Description	Level of Output
Physical Interface
Physical interface	Name of the physical interface, whether the interface is enabled, and the state of the physical interface: Up or Down.	All levels
Interface index	Physical interface's index number, which reflects its initialization sequence.	detail extensive none
Generation	Unique number for use by Juniper Networks technical support only.	detail extensive
SNMP ifIndex	SNMP index number for the physical interface.	detail extensive none
Type	Type of interface. Software-Pseudo indicates a standard software interface with no associated hardware device.	All levels
Link-level type	Encapsulation being used on the physical interface.	All levels
MTU	MTU size on the physical interface.	All levels
Clocking	Reference clock source. It can be Internal or External.	brief detail extensive
Speed	Speed at which the interface is running.	brief 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
Link type	Encapsulation being used on the physical interface.	detail extensive
Link flags	Information about the link. Possible values are described in the “Link Flags” section under Common Output Fields Description.	detail extensive
Physical info	Information about the physical interface.	detail extensive
Hold-times	Current interface hold-time up and hold-time down. Value is in milliseconds.	detail extensive
Current address, Hardware address	Configured MAC address and hardware MAC address.	detail extensive
Alternate link address	Backup address of the link.	detail extensive
Last flapped	Date, time, and how long ago the interface went from down to up. The format is Last flapped: `year`-`month`-`day` `hour`:`minute`:`second` `timezone` (`hour`:`minute`:`second` ago). For example, Last flapped: 2002-04-26 10:52:40 PDT (04:33:20 ago).	detail extensive none
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
Input errors	Input errors on the interface: Errors—Sum of incoming frame terminated and FCS errors. Drops—Number of packets dropped by the input queue of the I/O Manager ASIC. If the interface is saturated, this number increments once for every packet that is dropped by the ASIC's RED mechanism. Framing errors—Number of packets received with an invalid frame checksum (FCS). Runts—Number of frames received that are smaller than the runt threshold. Giants—Number of frames received that are larger than the giant threshold. Policed discards—Number of frames that the incoming packet match code discarded because they were not recognized or not of interest. Usually, this field reports protocols that the Junos OS does not handle. Resource errors—Sum of transmit drops.	detail extensive
Output errors	(Extensive only) Output errors on the interface. The following paragraphs explain the counters whose meaning might not be obvious: Carrier transitions—Number of times the interface has gone from down to up. This number does not normally increment quickly, increasing only when the cable is unplugged, the far-end system is powered down and then up, or another problem occurs. If the number of carrier transitions increments quickly (perhaps once every 10 seconds), the cable, the far-end system, or the PIC is malfunctioning. Errors—Sum of the outgoing frame terminated and FCS errors. Drops—Number of packets dropped by the output queue of the I/O Manager ASIC. If the interface is saturated, this number increments once for every packet that is dropped by the ASIC's RED mechanism. MTU errors—Number of packets whose size exceeded the MTU of the interface. Resource errors—Sum of transmit drops.	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
SNMP ifIndex	Logical interface SNMP interface index number.	detail extensive
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 “Logical Interface Flags” section under Common Output Fields Description.	All levels
Encapsulation	Encapsulation on the logical interface.	All levels
Protocol	Protocol family configured on the logical interface, such as iso, inet6, or mpls.	All levels
MTU	MTU size 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

show interfaces dsc

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user@host> show interfaces dsc  	
Physical interface: dsc, Enabled, Physical link is Up
  Interface index: 5, SNMP ifIndex: 5
  Type: Software-Pseudo, MTU: Unlimited
  Device flags   : Present Running
  Interface flags: Point-To-Point SNMP-Traps
  Link flags     : None
  Last flapped   : Never
    Input packets : 0 
    Output packets: 0

  Logical interface dsc.0 (Index 66) (SNMP ifIndex 235) 
    Flags: Point-To-Point SNMP-Traps Encapsulation: Unspecified
    Protocol inet, MTU: Unlimited
      Flags: None

show interfaces dsc brief

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user@host> show interfaces dsc brief 
Physical interface: dsc, Enabled, Physical link is Up
  Type: Software-Pseudo, Link-level type: Unspecified, MTU: Unlimited, Clocking: Unspecified, Speed: Unspecified
  Device flags   : Present Running
  Interface flags: Point-To-Point SNMP-Traps

  Logical interface dsc.0 
    Flags: Point-To-Point SNMP-Traps Encapsulation: Unspecified
    inet

show interfaces dsc detail

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user@host> show interfaces dsc detail   
Physical interface: dsc, Enabled, Physical link is Up
  Interface index: 5, SNMP ifIndex: 5, Generation: 9
  Type: Software-Pseudo, Link-level type: Unspecified, MTU: Unlimited, Clocking: Unspecified, Speed: Unspecified
  Device flags   : Present Running
  Interface flags: Point-To-Point SNMP-Traps
  Link type      : Unspecified
  Link flags     : None
  Physical info  : Unspecified
  Hold-times     : Up 0 ms, Down 0 ms
  Current address: Unspecified, Hardware address: Unspecified
  Alternate link address: Unspecified
  Last flapped   : Never
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :                    0
   Output bytes  :                    0
   Input  packets:                    0
   Output packets:                    0

  Logical interface dsc.0 (Index 66) (SNMP ifIndex 235) (Generation 6)
    Flags: Point-To-Point SNMP-Traps Encapsulation: Unspecified
    Protocol inet, MTU: Unlimited, Generation: 14, Route table: 0
      Flags: None

show interfaces dsc extensive

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user@host> show interfaces dsc extensive
Physical interface: dsc, Enabled, Physical link is Up
  Interface index: 5, SNMP ifIndex: 5, Generation: 9
  Type: Software-Pseudo, Link-level type: Unspecified, MTU: Unlimited, Clocking: Unspecified, Speed: Unspecified
  Device flags   : Present Running
  Interface flags: Point-To-Point SNMP-Traps
  Link type      : Unspecified
  Link flags     : None
  Physical info  : Unspecified
  Hold-times     : Up 0 ms, Down 0 ms
  Current address: Unspecified, Hardware address: Unspecified
  Alternate link address: Unspecified
  Last flapped   : Never
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :                    0
   Output bytes  :                    0
   Input  packets:                    0
   Output packets:                    0
  Input errors:
    Errors: 0, Drops: 0, Framing errors: 0, Runts: 0, Giants: 0, 
    Policed discards: 0, Resource errors: 0
  Output errors:
    Carrier transitions: 0, Errors: 0, Drops: 0, MTU errors: 0, 
    Resource errors: 0
  Logical interface dsc.0 (Index 66) (SNMP ifIndex 235) (Generation 6)
    Flags: Point-To-Point SNMP-Traps Encapsulation: Unspecified
    Protocol inet, MTU: Unlimited, Generation: 14, Route table: 0

Release Information

Command introduced before Junos OS Release 7.4.

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Junos CLI Reference

ON THIS PAGE

show interfaces (Discard)

Syntax

Description

Options

Required Privilege Level

Output Fields

Sample Output

show interfaces dsc

show interfaces dsc brief

show interfaces dsc detail

show interfaces dsc extensive

Release Information

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Junos CLI Reference

ON THIS PAGE

show interfaces (Discard)

Syntax

Description

Options

Required Privilege Level

Output Fields

Sample Output

show interfaces dsc

show interfaces dsc brief

show interfaces dsc detail

show interfaces dsc extensive

Release Information

Related Documentation

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