show interfaces irb

Physical interface

Name of the physical interface.

Enabled

State of the physical interface. Possible values are described in the “Enabled Field” section under Common Output Fields Description.

Proto

Protocol configured on the interface.

Interface index

Physical interface index number, which reflects its initialization sequence.

SNMP ifIndex

SNMP index number for the physical interface.

Type

Physical interface type.

Link-level type

Encapsulation being used on the physical interface.

MTU

MTU size on the physical interface.

Clocking

Reference clock source: Internal or External. Always unspecified on IRB interfaces.

Speed

Speed at which the interface is running. Always unspecified on IRB interfaces.

Device flags

Information about the physical device. Possible values are described in the “Device Flags” section under Common Output Fields Description.

Interface flags

Information about the interface. Possible values are described in the “Interface Flags” section under Common Output Fields Description.

Link type

Physical interface link type: full duplex or half duplex.

Link flags

Information about the link. Possible values are described in the “Links Flags” section under Common Output Fields Description.

Physical Info

Physical interface information.

Hold-times

Current interface hold-time up and hold-time down, in milliseconds.

Current address

Configured MAC address.

Hardware address

MAC address of the hardware.

Alternate link address

Backup address of the link.

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).

Statistics last cleared

Time when the statistics for the interface were last set to zero.

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.

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.

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 terminates 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.

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 terminates 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.

Logical interface

Name of the logical interface.

Index

Index number of the logical interface (which reflects its initialization sequence).

SNMP ifIndex

SNMP interface index number of the logical interface.

Generation

Unique number for use by Juniper Networks technical support only.

Flags

Information about the logical interface. Possible values are described in the “Logical Interface Flags” section under Common Output Fields Description.

Encapsulation

Encapsulation on the logical interface.

Bandwidth

Dummy value that is ignored by an IRB interface. IRB interfaces are pseudo interfaces and do not have physical bandwidth associated with them.

Routing Instance

Routing instance IRB is configured under.

Bridging Domain

Bridging domain IRB is participating in.

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.

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.

Local statistics

Statistics for traffic received from and transmitted to the Routing Engine.

Transit statistics

Statistics for traffic transiting the router.

Protocol

Protocol family configured on the local interface. Possible values are described in the “Protocol Field” section under Common Output Fields Description.

MTU

Maximum transmission unit size on the logical interface.

Maximum labels

Maximum number of MPLS labels configured for the MPLS protocol family on the logical interface.

Generation

Unique number for use by Juniper Networks technical support only.

Route table

Routing table in which the logical interface address is located. For example, 0 refers to the routing table inet.0.

Addresses, Flags

Information about address flags. Possible values are described in the “Addresses Flags” section under Common Output Fields Description.

Policer

The policer that is to be evaluated when packets are received or transmitted on the interface.

Flags

Information about the logical interface. Possible values are described in the “Logical Interface Flags” section under Common Output Fields Description.