Juniper show interfaces

show interfaces

Syntax

show interfaces ge-fpc/pic/port<brief | detail | extensive | terse><descriptions><media><snmp-index snmp-index><statistics>

Release Information

Command introduced in JUNOS Release 9.0 for EX-series switches.

Description

Display status information about the specified Gigabit Ethernet interface.

Options

ge-fpc/pic/port

Display standard information about the specified Gigabit Ethernet 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 (Gigabit Ethernet)
show interfaces brief (Gigabit Ethernet)
show interfaces detail (Gigabit Ethernet)
show interfaces extensive (Gigabit Ethernet)

Output Fields

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

Table 1: Gigabit Ethernet 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: Enabled or Disabled.

All levels

Interface index

Index number of the physical interface, which reflects its initialization sequence.

detail extensivenone

SNMP ifIndex

SNMP index number for the physical interface.

detail extensivenone

Generation

Unique number for use by Juniper Networks technical support only.

detail extensive

Description

Optional user-specified description.

brief detail extensive

Link-level type

Encapsulation being used on the physical interface.

All levels

MTU

Maximum transmission unit size on the physical interface. Default is 1514.

All levels

Speed

Speed at which the interface is running.

All levels

Loopback

Loopback status: Enabled or Disabled. If loopback is enabled, type of loopback: Local or Remote.

All levels

Source filtering

Source filtering status: Enabled or Disabled.

All levels

Flow control

Flow control status: Enabled or Disabled.

All levels

Auto-negotiation

Autonegotiation status: Enabled or Disabled.

All levels

Remote-fault

Remote fault status:

• Online—Autonegotiation is manually configured as online.
• Offline—Autonegotiation is manually configured as offline.

All levels

Device flags

Information about the physical device.

All levels

Interface flags

Information about the interface.

All levels

Link flags

Information about the link.

All levels

CoS queues

Number of CoS queues configured.

detail extensivenone

Hold-times

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

detail extensive

Current address

Configured MAC address.

detail extensivenone

Hardware address

MAC address of the hardware.

detail extensivenone

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: 2008–01–16 10:52:40 UTC (3d 22:58 ago).

detail extensivenone

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.

Note: The bandwidth bps counter is not enabled on this platform.

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.
• 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 software does not handle.
• L3 incompletes—Number of incoming packets discarded because they failed Layer 3 sanity checks of the headers. For example, a frame with less than 20 bytes of available IP header is discarded.
• L2 channel errors—Number of times the software did not find a valid logical interface for an incoming frame.
• L2 mismatch timeouts—Number of malformed or short packets that caused the incoming packet handler to discard the frame as unreadable.
• FIFO errors—Number of FIFO errors in the receive direction that are reported by the ASIC on the PIC. If this value is ever nonzero, the PIC is probably malfunctioning.
• Resource errors—Sum of transmit drops.

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 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 or PIM 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.
• Collisions—Number of Ethernet collisions. The Gigabit Ethernet PIC supports only full-duplex operation, so for Gigabit Ethernet PICs, this number should always remain 0. If it is nonzero, there is a software bug.
• Aged packets—Number of packets that remained in shared packet SDRAM so long that the system automatically purged them. The value in this field should never increment. If it does, it is most likely a software bug or possibly malfunctioning hardware.
• FIFO errors—Number of FIFO errors in the send direction as reported by the ASIC on the PIC. If this value is ever nonzero, the PIC is probably malfunctioning.
• HS link CRC errors—Number of errors on the high-speed links between the ASICs responsible for handling the router interfaces.
• MTU errors—Number of packets whose size exceeded the MTU of the interface.
• Resource errors—Sum of transmit drops.

extensive

Egress queues

Total number of egress queues supported on the specified interface.

detail extensive

Queue counters (Egress )

CoS queue number and its associated user-configured forwarding class name.

• Queued packets—Number of queued packets.
• Transmitted packets—Number of transmitted packets.
• Dropped packets—Number of packets dropped by the ASIC's RED mechanism.

detail extensive

Active alarms and Active defects

Ethernet-specific defects that can prevent the interface from passing packets. When a defect persists for a certain amount of time, it is promoted to an alarm. Based on the switch configuration, an alarm can ring the red or yellow alarm bell on the switch, or turn on the red or yellow alarm LED on the craft interface. These fields can contain the value None or Link.

• None—There are no active defects or alarms.
• Link—Interface has lost its link state, which usually means that the cable is unplugged, the far-end system has been turned off, or the PIC is malfunctioning.

detail extensivenone

MAC statistics

Receive and Transmit statistics reported by the PIC's MAC subsystem.

• Total octets and total packets—Total number of octets and packets. For Gigabit Ethernet IQ PICs, the received octets count varies by interface type.
• Unicast packets, Broadcast packets, and Multicast packets—Number of unicast, broadcast, and multicast packets.
• CRC/Align errors—Total number of packets received that had a length (excluding framing bits, but including FCS octets) of between 64 and 1518 octets, inclusive, and had either a bad FCS with an integral number of octets (FCS Error) or a bad FCS with a nonintegral number of octets (Alignment Error).
• FIFO error—Number of FIFO errors that are reported by the ASIC on the PIC. If this value is ever nonzero, the PIC is probably malfunctioning.
• MAC control frames—Number of MAC control frames.
• MAC pause frames—Number of MAC control frames with pause operational code.
• Oversized frames—Number of frames that exceed 1518 octets.
• Jabber frames—Number of frames that were longer than 1518 octets (excluding framing bits, but including FCS octets), and had either an FCS error or an alignment error. This definition of jabber is different from the definition in IEEE-802.3 section 8.2.1.5 (10BASE5) and section 10.3.1.4 (10BASE2). These documents define jabber as the condition in which any packet exceeds 20 ms. The allowed range to detect jabber is from 20 ms to 150 ms.
• Fragment frames—Total number of packets that were less than 64 octets in length (excluding framing bits, but including FCS octets), and had either an FCS error or an alignment error. Fragment frames normally increment because both runts (which are normal occurrences caused by collisions) and noise hits are counted.
• Code violations—Number of times an event caused the PHY to indicate “Data reception error” or “invalid data symbol error.”

extensive

Filter Statistics

Receive and Transmit statistics reported by the PIC's MAC address filter subsystem.

extensive

Autonegotiation information

Information about link autonegotiation.

• Negotiation status:
  • Incomplete—Ethernet interface has the speed or link mode configured.
  • No autonegotiation—Remote Ethernet interface has the speed or link mode configured, or does not perform autonegotiation.
  • Complete—Ethernet interface is connected to a device that performs autonegotiation and the autonegotiation process is successful.
• Link partner status—OK when Ethernet interface is connected to a device that performs autonegotiation and the autonegotiation process is successful.
• Link partner:
  • Link mode—Depending on the capability of the attached Ethernet device, either Full-duplex or Half-duplex.
  • Flow control—Types of flow control supported by the remote Ethernet device. For Gigabit Ethernet interfaces, types are Symmetric (link partner supports PAUSE on receive and transmit), Asymmetric (link partner supports PAUSE on transmit), and Symmetric/Asymmetric (link partner supports both PAUSE on receive and transmit or only PAUSE receive).
  • Remote fault—Remote fault information from the link partner—Failure indicates a receive link error.OK indicates that the link partner is receiving. Negotiation error indicates a negotiation error.Offline indicates that the link partner is going offline.
  • Link partner speed—Speed of the link partner.
• Local resolution—Information from the link partner:
  • Flow control—Types of flow control supported by the remote Ethernet device. For Gigabit Ethernet interfaces, types are Symmetric (link partner supports PAUSE on receive and transmit), Asymmetric (link partner supports PAUSE on transmit), and Symmetric/Asymmetric (link partner supports both PAUSE on receive and transmit or only PAUSE receive).
  • Remote fault—Remote fault information. Link OK (no error detected on receive), Offline (local interface is offline), and Link Failure (link error detected on receive).

extensive

Packet Forwarding Engine configuration

Information about the configuration of the Packet Forwarding Engine:

• Destination slot—FPC slot number.

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 extensivenone

SNMP ifIndex

SNMP interface index number for the logical interface.

detail extensivenone

Generation

Unique number for use by Juniper Networks technical support only.

detail extensive

Flags

Information about the logical interface.

All levels

Encapsulation

Encapsulation on the logical interface.

All levels

Protocol

Protocol family.

detail extensivenone

MTU

This field is not supported for logical interfaces on EX-series switches.

detail extensivenone

Generation

Unique number for use by Juniper Networks technical support only.

detail extensive

Route Table

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

detail extensivenone

Flags

Information about protocol family flags.

If unicast Reverse Path Forwarding (uRPF) is explicitly configured on the specified interface, the uRPF flag displays. If uRPF was configured on a different interface (and therefore is enabled on all switch interfaces) but was not explicitly configured on the specified interface, the uRPF flag does not display even though uRPF is enabled.

detail extensive

protocol-family

Protocol family configured on the logical interface. If the protocol is inet, the IP address of the interface is also displayed.

brief

Flags

Information about address flag.

detail extensivenone

Destination

IP address of the remote side of the connection.

detail extensivenone

Local

IP address of the logical interface.

detail extensivenone

Broadcast

Broadcast address of the logical interlace.

detail extensivenone

Generation

Unique number for use by Juniper Networks technical support only.

detail extensive

Sample Output

show interfaces (Gigabit Ethernet)

user@host> show interfaces ge-0/0/0

Physical interface: ge-0/0/0, Enabled, Physical link is Down  Interface index: 129, SNMP ifIndex: 21  Link-level type: Ethernet, MTU: 1514, Speed: Unspecified, Loopback: Disabled,  Source filtering: Disabled, Flow control: Enabled, Auto-negotiation: Enabled  Remote fault: Online  Device flags   : Present Running Down  Interface flags: Hardware-Down SNMP-Traps Internal: 0x0  CoS queues     : 8 supported, 8 maximum usable queues  Hold-times     : Up 0 ms, Down 0 ms  Current address: 00:19:e2:50:3f:41, Hardware address: 00:19:e2:50:3f:41  Last flapped   : 2008-01-16 11:40:53 UTC (4d 02:30 ago)  Input rate     : 0 bps (0 pps)  Output rate    : 0 bps (0 pps)  Ingress rate at Packet Forwarding Engine      : 0 bps (0 pps)  Ingress drop rate at Packet Forwarding Engine : 0 bps (0 pps)  Active alarms  : None  Active defects : None   Logical interface ge-0/0/0.0 (Index 65) (SNMP ifIndex 22)     Flags: SNMP-Traps    Encapsulation: ENET2    Input packets : 0     Output packets: 0    Protocol eth-switch, MTU: 0      Flags: None 

show interfaces brief (Gigabit Ethernet)

user@host> show interfaces ge-0/0/0 brief

Physical interface: ge-0/0/0, Enabled, Physical link is Down  Description: voice priority and tcp and icmp traffic rate-limiting filter at ingress port  Link-level type: Ethernet, MTU: 1514, Speed: Unspecified, Loopback: Disabled,  Source filtering: Disabled, Flow control: Enabled, Auto-negotiation: Enabled,  Remote fault: Online  Device flags   : Present Running Down  Interface flags: Hardware-Down SNMP-Traps Internal: 0x0  Link flags     : None  Logical interface ge-0/0/0.0    Flags: Device-Down SNMP-Traps Encapsulation: ENET2    eth-switch

show interfaces detail (Gigabit Ethernet)

user@host> show interfaces ge-0/0/0 detail

Physical interface: ge-0/0/0, Enabled, Physical link is Up  Interface index: 129, SNMP ifIndex: 21, Generation: 130  Link-level type: Ethernet, MTU: 1514, Speed: Auto, Loopback: Disabled,  Source filtering: Disabled, Flow control: Enabled, Auto-negotiation: Enabled,  Remote fault: Online  Device flags   : Present Running  Interface flags: SNMP-Traps Internal: 0x0  Link flags     : None  CoS queues     : 8 supported, 8 maximum usable queues  Hold-times     : Up 0 ms, Down 0 ms  Current address: 00:19:e2:50:a8:a1, Hardware address: 00:19:e2:50:a8:a1  Last flapped   : 2008-01-29 10:54:31 UTC (01:36:47 ago)  Statistics last cleared: Never  Traffic statistics:   Input  bytes  :         368613240000                    0 bps   Output bytes  :         368642493760                    0 bps   Input  packets:           5759581881                    0 pps   Output packets:           5760038969                    0 pps  Egress queues: 8 supported, 0 in use  Queue counters:       Queued packets  Transmitted packets      Dropped packets    0 best-effort                    0           5760782572                    0    1 assured-forw                   0                    0                    0    5 expedited-fo                   0                    0                    0    7 network-cont                   0                    0                    0Active alarms  : NoneActive defects : NoneLogical interface ge-0/0/0.0 (Index 66) (SNMP ifIndex 22) (Generation 132)    Flags: SNMP-Traps Encapsulation: ENET2    Traffic statistics:     Input  bytes  :                   60     Output bytes  :                    0     Input  packets:                    1     Output packets:                    0    Local statistics:     Input  bytes  :                   60     Output bytes  :                    0     Input  packets:                    1     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 eth-switch, MTU: 0, Generation: 143, Route table: 0      Flags: Is-Primary

show interfaces extensive (Gigabit Ethernet)

user@host> show interfaces ge-0/0/0 extensive

 Physical interface: ge-0/0/0, Enabled, Physical link is Up  Interface index: 129, SNMP ifIndex: 21, Generation: 130  Link-level type: Ethernet, MTU: 1514, Speed: Auto, Loopback: Disabled,  Source filtering: Disabled, Flow control: Enabled, Auto-negotiation: Enabled,  Remote fault: Online  Device flags   : Present Running  Interface flags: SNMP-Traps Internal: 0x0  Link flags     : None  CoS queues     : 8 supported, 8 maximum usable queues  Hold-times     : Up 0 ms, Down 0 ms  Current address: 00:19:e2:50:a8:a1, Hardware address: 00:19:e2:50:a8:a1  Last flapped   : 2008-01-29 10:54:31 UTC (01:40:54 ago)  Statistics last cleared: Never  Traffic statistics:   Input  bytes  :         386327695808                    0 bps   Output bytes  :         386356949568                    0 bps   Input  packets:           6036370253                    0 pps   Output packets:           6036827341                    0 pps  Input errors:    Errors: 0, Drops: 0, Framing errors: 0, Runts: 0, Policed discards: 0,    L3 incompletes: 0, L2 channel errors: 0, L2 mismatch timeouts: 0,    FIFO errors: 0, Resource errors: 0  Output errors:    Carrier transitions: 0, Errors: 0, Drops: 0, Collisions: 0, Aged packets: 0,   FIFO errors: 0, Resource errors: 0 Output errors:   Carrier transitions: 0, Errors: 0, Drops: 0, Collisions: 0, Aged packets: 0,   FIFO errors: 0, HS link CRC errors: 0, MTU errors: 0, Resource errors: 0 Egress queues: 8 supported, 0 in use Queue counters:       Queued packets  Transmitted packets      Dropped packets   0 best-effort                    0           6036979415                    0   1 assured-forw                   0                    0                    0   5 expedited-fo                   0                    0                    0   7 network-cont                   0                    0                    0 Active alarms  : None Active defects : None MAC statistics:                      Receive         Transmit   Total octets                  386327695808     386356949568   Total packets                   6036370253       6036827341   Unicast packets                 6036370252       6036827341   Broadcast packets                        0                0  Multicast packets                        1                0  CRC/Align errors                         0                0  FIFO errors                              0                0  MAC control frames                       0                0  MAC pause frames                         0                0  Oversized frames                         0  Jabber frames                            0  Fragment frames                          0  Code violations                          0Filter statistics:  Input packet count                       0  Input packet rejects                     0  Input DA rejects                         0  Input SA rejects                         0  Output packet count                                       0  Output packet pad count                                   0  Output packet error count                                 0  CAM destination filters: 0, CAM source filters: 0Autonegotiation information:  Negotiation status: Complete    Link partner:        Link mode: Full-duplex, Flow control: None, Remote fault: OK,        Link partner Speed: 1000 Mbps    Local resolution:        Flow control: None, Remote fault: Link OK  Packet Forwarding Engine configuration:    Destination slot: 0  Logical interface ge-0/0/0.0 (Index 66) (SNMP ifIndex 22) (Generation 132)    Flags: SNMP-Traps Encapsulation: ENET2    Traffic statistics:     Input  bytes  :                   60     Output bytes  :                    0     Input  packets:                    1     Output packets:                    0    Local statistics:     Input  bytes  :                   60     Output bytes  :                    0    Input  packets:                    1    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 eth-switch, MTU: 0, Generation: 143, Route table: 0     Flags: Is-Primary

---

Published: 2010-01-12