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show interfaces (T3 or E3)

 

Syntax

Release Information

Command introduced before Junos OS Release 7.4.

Description

Display status information about the specified T3 or E3 interface.

Options

interface-typeOn M Series and T Series routers, the T3 interface type is t3-fpc/pic/port, whereas the E3 interface type is e3-fpc/pic/port.
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 (T3, PPP)

show interfaces detail (T3, PPP)

show interfaces extensive (T3, PPP)

show interfaces (E3, Frame Relay)

show interfaces detail (E3, Frame Relay)

show interfaces extensive (E3, Frame Relay)

Output Fields

Table 1 lists the output fields for the show interfaces (T3 or E3) command. Output fields are listed in the approximate order in which they appear.

Table 1: T3 or E3 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

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.

All levels

Speed

Speed at which the interface is running.

All levels

Loopback

Whether loopback is enabled and the type of loopback (local or remote).

All levels

FCS

Frame check sequence on the interface (either 16 or 32). The default is 16 bits.

All levels

Mode

(T3 only) Whether C-bit parity mode or M13 mode is enabled.

All levels

Long buildout

(T3 only) Buildout setting: less than 255 feet (68 meters) or greater than 255 feet and shorter than 450 feet (137 meters).

All levels

Framing

(E3 only) Physical layer framing format used on the link. It can be G751 or Unframed. The default is G751.

All levels

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 flags

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

All levels

Hold-times

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

detail extensive

Keepalive settings

(PPP and HDLC) Configured settings for keepalives.

  • interval seconds—Time in seconds between successive keepalive requests. The range is 10 seconds through 32,767 seconds, with a default of 10  seconds.

  • down-count number—Number of keepalive packets a destination must fail to receive before the network takes a link down. The range is 1 through 255, with a default of 3.

  • up-count number—Number of keepalive packets a destination must receive to change a link's status from down to up. The range is 1 through 255, with a default of 1.

detail extensive none

Keepalive statistics or Keepalive

(PPP and HDLC) Information about keepalive packets.

  • Input—Number of keepalive packets received by PPP.

    • (last seen 00:00:00 ago)—Time since the last keepalive packet was received, in the format hh:mm:ss.

  • Output—Number of keepalive packets sent by PPP and how long ago the last keepalive packets were sent and received.

    • (last seen 00:00:00 ago)—Time since the last keepalive packet was sent, in the format hh:mm:ss.

detail extensive none

LMI settings

(Frame Relay) Local Management Interface (LMI) settings (ANSI or ITU). ANSI LMI settings is the default. The format is LMI settings: value, value... xx seconds, where value can be:

  • n391dte—DTE full status polling interval (1–255)

  • n392dce—DCE error threshold (1–10)

  • n392dte—DTE error threshold (1–10)

  • n393dce—DCE monitored event count (1–10)

  • n393dte—DTE monitored event count (1–10)

  • t391dte—DTE polling timer (5–30 seconds)

  • t392dce—DCE polling verification timer (5–30 seconds)

detail extensive none

LMI

(Frame Relay) LMI statistics:

  • Input—Number of packets coming in on the interface (nn) and how much time has passed since the last packet arrived. The format is Input: nn (last seen hh:mm:ss ago).

  • Output—Number of packets sent out on the interface (nn) and how much time has passed since the last packet was sent. The format is Output: nn (last sent hh:mm:ss ago).

detail extensive none

DTE statistics

(Frame Relay) Statistics about messages transmitted from the data terminal equipment (DTE) to the data communications equipment (DCE):

  • Enquiries sent—Number of link status enquiries sent from the DTE to the DCE.

  • Full enquiries sent—Number of full enquiries sent from the DTE to the DCE.

  • Enquiry responses received—Number of enquiry responses received by the DTE from the DCE.

  • Full enquiry responses received—Number of full enquiry responses sent from the DTE to the DCE.

detail extensive none

DCE statistics

(Frame Relay) Statistics about messages transmitted from the DCE to the DTE:

  • Enquiries received—Number of enquiries received by the DCE from the DTE.

  • Full enquiries received—Number of full enquiries received by the DCE from the DTE.

  • Enquiry responses sent—Number of enquiry responses sent from the DCE to the DTE.

  • Full enquiry responses sent—Number of full enquiry responses sent from the DCE to the DTE.

detail extensive none

Common statistics

(Frame Relay) Statistics about messages sent between the DTE and the DCE:

  • Unknown messages received—Number of received packets that do not fall into any category.

  • Asynchronous updates received—Number of link status peer changes received.

  • Out-of-sequence packets received—Number of packets for which the sequence of the packets received is different from the expected sequence.

  • Keepalive responses timedout—Number of keepalive responses that timed out when no LMI packet was reported for n392dte or n393dce intervals. (See LMI settings.)

detail extensive none

Nonmatching DCE-end DLCIs

(Frame Relay. Displayed only from the DTE.) Number of DLCIs configured from the DCE.

detail extensive none

LCP state

(PPP) Link Control Protocol state.

  • Conf-ack-received—Acknowledgement was received.

  • Conf-ack-sent—Acknowledgement was sent.

  • Conf-req-sent—Request was sent.

  • Down—LCP negotiation is incomplete (not yet completed or has failed).

  • Opened—LCP negotiation is successful.

detail extensive none

NCP state

(PPP) Network Control Protocol state.

  • Conf-ack-received—Acknowledgement was received.

  • Conf-ack-sent—Acknowledgement was sent.

  • Conf-req-sent—Request was sent.

  • Down—NCP negotiation is incomplete (not yet completed or has failed).

  • Opened—NCP negotiation is successful.

detail extensive none

CHAP state

(PPP) Displays the state of the Challenge Handshake Authentication Protocol (CHAP) during its transaction.

  • Chap-Resp-received—Response received for the challenge sent, but CHAP not yet moved into the Success state. (Most likely with RADIUS authentication.)

  • Chap-Resp-sent—Response sent for the challenge received.

  • Chap-Chal-sent—Challenge sent.

  • Chap-Chal-received—Challenge received but response not yet sent.

  • Down—CHAP authentication is incomplete (not yet completed or has failed).

  • Not-configured—CHAP is not configured on the interface.

  • Opened—CHAP authentication was successful.

detail extensive none

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 (year-month-day hour:minute:second ago) . For example, Last flapped: 2002-04-26 10:52:40 PDT (04:33:20 ago).

detail extensive none

CoS queues

Number of CoS queues configured.

detail extensive none

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—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 received 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—(T3 only) Number of frames received that are smaller than the runt threshold.

  • Giants—(T3 only) Number of frames received that are larger than the giant threshold.

  • Bucket Drops—Drops resulting from the traffic load exceeding the interface transmit/receive leaky bucket configuration. The default is off.

  • 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.

  • L3 incompletes—Number of incoming packets discarded because they failed Layer 3 (usually IPv4) sanity checks of the header. 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.

  • HS link CRC errors—Number of errors on the high-speed links between the ASICs responsible for handling the router interfaces.

  • SRAM errors—Number of hardware errors that occurred in the static RAM (SRAM) on the PIC or PIM. If the value of this field increments, the PIC or PIM is 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 up, or another problem occurs. If the number of carrier transitions increments (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.

  • 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.

  • MTU errors—Number of packets whose size exceeded the MTU of the interface.

  • Resource errors—Sum of transmit drops.

extensive

Queue counters

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

Active defects

E3 media-specific defects that can render the interface unable to pass packets. When a defect persists for a certain amount of time, it is promoted to an alarm. Based on the router configuration, an alarm can ring the red or yellow alarm bell on the router, or turn on the red or yellow alarm LED on the craft interface.

  • AIS—Alarm indication signal

  • EXZ—Excessive zeros

  • FERF—Far-end receive failures

  • IDLE—Idle code detected

  • LCD—Loss of cell delineation

  • LCV—Line code violation

  • LOF—Loss of frame

  • LOS—Loss of signal

  • PLL—Phase-locked loop

  • YLW—Remote defect indication

detail extensive none

DS3 media or E3 media

Counts of DS3 (T3) or E3 media-specific errors.

  • Seconds—Number of seconds the defect has been active.

  • Count—Number of times that the defect has gone from inactive to active.

  • State—State of the error. State other than OK indicates a problem.

    The DS3 or E3 media-specific error types can be:

    • PLL Lock—Phase-locked loop out of lock

    • Reframing—Frame alignment recovery time

    • AIS—Alarm indication signal

    • LOF—Loss of frame

    • LOS—Loss of signal

    • IDLE—Idle code detected

    • YELLOW—Errors at the remote site receiver

    • BPV—Bipolar violation

    • EXZ—Excessive zeros

    • LCV—Line code violation

    • PCV—(DS3 only) Pulse code violation

    • CCV—(DS3 only) C-bit coding violation

    • FEBE—(DS3 only) Far-end block error

    • LES—Line error seconds

    • PES—(DS3 only) P-bit errored seconds

    • PSES—(DS3 only) P-bit errored seconds (section)

    • CES—(DS3 only) C-bit errored seconds

    • CSES—(DS3 only) C-bit severely errored seconds

    • SEFS—Severely errored framing seconds

    • UAS—Unavailable seconds

extensive

HDLC configuration

Information about the HDLC configuration.

  • Policing bucket—Configured state of the receiving policer.

  • Shaping bucket—Configured state of the transmitting shaper.

  • Giant threshold—Giant threshold programmed into the hardware.

  • Runt threshold—Runt threshold programmed into the hardware.

  • Idle cycle flag—Idle cycle flags.

  • Start end flag—Start and end flag.

extensive

DSU configuration

Information about the DSU configuration. The last three lines (Bit count, Error bit count, and LOS information) are displayed only if a BERT has ever been run on the interface.

  • Compatibility mod—CSU/DSU compatibility mode: None, Larscom, Kentrox, or Digital-Link.

  • Scrambling—Payload scrambling: Enabled or Disabled.

  • Subrate—Configured subrate setting. Applies only when Digital-Link compatibility mode is used. The subrate can be Disabled or display units in Kbps.

  • FEAC loopbac—(T3) Whether a far-end alarm and control (FEAC) loopback is Active or Inactive. This feature is used to send alarm or status information from the far-end terminal back to the near-end terminal and to initiate T3 loopbacks at the far-end terminal from the near-end terminal.

  • Response—Whether the FEAC signal is Enabled or Disabled.

  • Count—Number of FEAC loopbacks.

extensive

DS3 (or E3) BERT configuration

BERT (bit error rate test) checks the quality of the line. This output appears only when a BERT is run on the interface.

  • BERT time period—Configured total time period that the BERT is to run.

  • Elapsed—Actual time elapsed since the start of the BERT (in seconds).

  • Induced error rate—Configured rate at which the bit errors are induced in the BERT pattern.

  • Algorithm—Type of algorithm selected for the BERT.

detail extensive none

Packet Forwarding Engine configuration

Information about the configuration of the Packet Forwarding Engine:

  • Destination slot—FPC slot number.

  • PLP byte—Packet Level Protocol byte.

extensive

CoS information

Information about the CoS queue for the physical interface.

  • CoS transmit queue—Queue number and its associated user-configured forwarding class name.

  • Bandwidth %—Percentage of bandwidth allocated to the queue.

  • Bandwidth bps—Bandwidth allocated to the queue (in bps).

  • Buffer %—Percentage of buffer space allocated to the queue.

  • Buffer usec—Amount of buffer space allocated to the queue, in microseconds. This value is nonzero only if the buffer size is configured in terms of time.

  • Priority—Queue priority: low or high.

  • Limit—Displayed if rate limiting is configured for the queue. Possible values are none and exact. If exact is configured, the queue transmits only up to the configured bandwidth, even if excess bandwidth is available. If none is configured, the queue transmits beyond the configured bandwidth if bandwidth is available.

extensive

Logical Interface 

Logical interface

Name of the logical interface.

detail extensive none

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.

extensive

Flags

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

detail extensive none

Encapsulation

Encapsulation on the logical interface.

detail extensive none

Input packets

Number of packets received on the logical interface.

None specified

Output packets

Number of packets transmitted on the logical interface.

None specified

Traffic statistics

(Frame Relay) 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

Local statistics

(Frame Relay) Statistics for traffic received from and transmitted to the Routing Engine. 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

Transit statistics

(Frame Relay) 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. This counter normally stabilizes in less than 1 second.

detail extensive

Protocol

Protocol family configured on the logical interface, such as iso, inet6, mlfr, or mpls.

detail extensive none

Multilink bundle

(Multilink) Interface name for the multilink bundle.

detail extensive none

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

Flags

Information about the protocol family flags. Possible values are described in the “Family Flags” section under Common Output Fields Description.

detail extensive none

Addresses, Flags

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

detail extensive none

Destination

IP address of the remote side of the connection.

detail extensive none

Local

IP address of the logical interface.

detail extensive none

Broadcast

Broadcast address.

detail extensive none

Generation

Unique number for use by Juniper Networks technical support only.

detail extensive none

DLCI

(Frame Relay) DLCI number of the logical interface. The following DLCI information is displayed: Flags, Total down time, Last down, and Traffic statistics (or Input packets, Output packets). Flags is one or more of the following:

  • Active—Set when the link is active and the DTE and DCE are exchanging information.

  • Down—Set when the link is active, but no information is received from the DCE.

  • DCE Unconfigured—Set when the corresponding DLCI in the DCE is not configured.

  • Configured—Set when the corresponding DLCI in the DCE is configured.

  • DCE-configured—Displayed when the command is issued from the DTE.

detail extensive none

DLCI statistics

(Frame Relay) Data-link connection identifier (DLCI) statistics.

  • Active DLCI—Number of active DLCIs.

  • Inactive DLCI—Number of inactive DLCIs.

detail extensive none

Sample Output

show interfaces (T3, PPP)

user@host> show interfaces t3-0/2/0

show interfaces detail (T3, PPP)

user@host> show interfaces t3-0/2/0 detail

show interfaces extensive (T3, PPP)

user@host> show interfaces t3-0/2/0 extensive

show interfaces (E3, Frame Relay)

user@host> show interfaces e3-1/2/0

show interfaces detail (E3, Frame Relay)

user@host> show interfaces e3-1/2/0 detail

show interfaces extensive (E3, Frame Relay)

user@host> show interfaces e3-1/2/0 extensive