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Supported Platforms

show interfaces irb

Syntax

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

Release Information

Command introduced in Junos OS Release 8.4.

Description

Display integrated routing and bridging interfaces information.

Options

brief | detail | extensive | terse

—

(Optional) Display the specified level of output.

descriptions

—

(Optional) Display interface description strings.

mac

—

Display hardware MAC address

media

—

(Optional) Display media-specific information about network interfaces.

snmp-index snmp-index

—

(Optional) Display information for the interface with the specified SNMP index.

statistics

—

(Optional) Display static interface statistics.

Additional Information

Integrated routing and bridging (IRB) provides simultaneous support for Layer 2 bridging and Layer 3 IP routing on the same interface. IRB enables you to route local packets to another routed interface or to another bridging domain that has a Layer 3 protocol configured.

Required Privilege Level

view

List of Sample Output

show interfaces irb extensive
show interfaces irb snmp-index

Output Fields

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

Table 1: show interfaces irb Output Fields

Field Name	Field Description	Level of Output
Physical Interface
Physical interface	Name of the physical interface.	All levels
Enabled	State of the physical interface. Possible values are described in the “Enabled Field” section under Common Output Fields Description.	All levels
Proto	Protocol configured on the interface.	terse
Interface index	Physical interface index number, which reflects its initialization sequence.	detail extensive none
SNMP ifIndex	SNMP index number for the physical interface.	detail extensive none
Type	Physical interface type.	detail extensive none
Link-level type	Encapsulation being used on the physical interface.	detail extensive brief none
MTU	MTU size on the physical interface.	detail extensive brief none
Clocking	Reference clock source: Internal or External. Always unspecified on IRB interfaces.	detail extensive brief
Speed	Speed at which the interface is running. Always unspecified on IRB interfaces.	detail extensive brief
Device flags	Information about the physical device. Possible values are described in the “Device Flags” section under Common Output Fields Description.	detail extensive brief none
Interface flags	Information about the interface. Possible values are described in the “Interface Flags” section under Common Output Fields Description.	detail extensive brief none
Link type	Physical interface link type: full duplex or half duplex.	detail extensive none
Link flags	Information about the link. Possible values are described in the “Links Flags” section under Common Output Fields Description.	detail extensive none
Physical Info	Physical interface information.	All levels
Hold-times	Current interface hold-time up and hold-time down, in milliseconds.	detail extensive
Current address	Configured MAC address.	detail extensive none
Hardware address	MAC address of the hardware.	detail extensive none
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 hours:minutes:seconds timezone (hours:minutes:seconds 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—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
IPv6 transit statistics	Number of IPv6 transit bytes and packets received and transmitted on the physical interface if IPv6 statistics tracking is enabled. 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
Input errors	Input errors on the interface. The following paragraphs explain the counters whose meaning might not be obvious: Errors—Sum of the incoming frame aborts 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	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 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 DPC is malfunctioning. Errors—Sum of the outgoing frame aborts 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	Index number of the logical interface (which reflects its initialization sequence).	detail extensive none
SNMP ifIndex	SNMP interface index number of the logical interface.	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 “Logical Interface Flags” section under Common Output Fields Description.	detail extensive
Encapsulation	Encapsulation on the logical interface.	detail extensive
Bandwidth	Speed at which the interface is running.	detail extensive
Routing Instance	Routing instance IRB is configured under.	detail extensive
Bridging Domain	Bridging domain IRB is participating in.	detail extensive
Traffic statistics	Number and rate of bytes and packets received and transmitted on the logical 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.	detail extensive
IPv6 transit statistics	Number of IPv6 transit bytes and packets received and transmitted on the logical interface if IPv6 statistics tracking is enabled. 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
Local statistics	Statistics for traffic received from and transmitted to the Routing Engine.	detail extensive
Transit statistics	Statistics for traffic transiting the router.	detail extensive
Protocol	Protocol family configured on the local interface. Possible values are described in the “Protocol Field” section under Common Output Fields Description.	detail extensive
MTU	Maximum transmission unit size on the logical interface.	detail extensive
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
Addresses, Flags	Information about address flags. Possible values are described in the “Addresses Flags” section under Common Output Fields Description.	detail extensive
Policer	The policer that is to be evaluated when packets are received or transmitted on the interface.	detail extensive
Flags	Information about the logical interface. Possible values are described in the “Logical Interface Flags” section under Common Output Fields Description.	detail extensive

Sample Output

show interfaces irb extensive

user@host> show interfaces irb extensive

Physical interface: irb, Enabled, Physical link is Up
  Interface index: 129, SNMP ifIndex: 23, Generation: 130
  Type: Ethernet, Link-level type: Ethernet, MTU: 1514, Clocking: Unspecified, Speed: Unspecified
  Device flags   : Present Running
  Interface flags: SNMP-Traps
  Link type      : Full-Duplex
  Link flags     : None
  Physical info  : Unspecified
  Hold-times     : Up 0 ms, Down 0 ms
  Current address: 02:00:00:00:00:30, Hardware address: 02:00:00:00:00:30
  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
   IPv6 transit 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 irb.0 (Index 68) (SNMP ifIndex 70) (Generation 143)
    Flags: Hardware-Down SNMP-Traps 0x4000 Encapsulation: ENET2
    Bandwidth: 1000mbps
    Routing Instance: customer_0 Bridging Domain: bd0
    Traffic statistics:
     Input  bytes  :                    0
     Output bytes  :                    0
     Input  packets:                    0
     Output packets:                    0
     IPv6 transit statistics:
      Input  bytes  :                   0
      Output bytes  :                   0
      Input  packets:                   0
      Output packets:                   0
    Local 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
     IPv6 transit statistics:
      Input  bytes  :                   0
      Output bytes  :                   0
      Input  packets:                   0
      Output packets:                   0
    Protocol inet, MTU: 1500, Generation: 154, Route table: 0
      Addresses, Flags: Dest-route-down Is-Preferred Is-Primary
        Destination: 10.51.1/24, Local: 10.51.1.2, Broadcast: 10.51.1.255,
        Generation: 155
    Protocol multiservice, MTU: 1500, Generation: 155, Route table: 0
      Flags: Is-Primary
      Policer: Input: __default_arp_policer

show interfaces irb snmp-index

user@host> show interfaces snmp-index 25

Physical interface: irb, Enabled, Physical link is Up
  Interface index: 128, SNMP ifIndex: 25
  Type: Ethernet, Link-level type: Ethernet, MTU: 1514
  Device flags   : Present Running
  Interface flags: SNMP-Traps
  Link type      : Full-Duplex
  Link flags     : None
  Current address: 02:00:00:00:00:30, Hardware address: 02:00:00:00:00:30
  Last flapped   : Never
    Input packets : 0 
    Output packets: 0

  Logical interface irb.0 (Index 68) (SNMP ifIndex 70) 
    Flags: Hardware-Down SNMP-Traps 0x4000 Encapsulation: ENET2
    Bandwidth: 1000mbps
    Routing Instance: customer_0 Bridging Domain: bd0
    Input packets : 0 
    Output packets: 0
    Protocol inet, MTU: 1500
      Addresses, Flags: Dest-route-down Is-Preferred Is-Primary
        Destination: 10.51.1/24, Local: 10.51.1.2, Broadcast: 10.51.1.255
    Protocol multiservice, MTU: 1500
      Flags: Is-Primary

TechLibrary

Supported Platforms

show interfaces irb

Syntax

Release Information

Description

Options

Additional Information

Required Privilege Level

List of Sample Output

Output Fields

Sample Output

Published: 2013-08-29

Supported Platforms

Published: 2013-08-29