Step 2: Verify That the Interface Is Up

Purpose

Display the status of a Channelized DS-1 or DS-3 interface to determine whether the physical link is up or down.

Action

To verify that the status of the Channelized DS-1 or DS-3 interface is up, use one of the following JUNOS command-line interface (CLI) operational mode commands:

user@host> show interfaces t1-fpc/pic/port:channel

user@host> show interfaces t3-fpc/pic/port:channel

Sample Output

The following sample output is for a channelized DS-3 to DS-1 interface:

user@host# show interfaces t1-2/1/0:20                         

Physical interface: t1-2/1/0:20, Enabled, Physical link is Up

  Interface index: 210, SNMP ifIndex: 173

  Link-level type: Cisco-HDLC, MTU: 1504, Clocking: Internal, Speed: T1, 
Loopback: Local, FCS: 16,

  Mode: C/Bit parity, Framing: ESF

  Device flags   : Present Running

  Interface flags: Point-To-Point SNMP-Traps

  Link flags     : Keepalives

  Keepalive settings: Interval 10 seconds, Up-count 1, Down-count 3

  Keepalive: Input: 39 (00:00:06 ago), Output: 0 (never)

  CoS queues     : 4 supported

  Last flapped   : 2004-05-20 21:46:27 UTC (00:14:28 ago)

  Input rate     : 16 bps (0 pps)

  Output rate    : 160 bps (0 pps)

  DS1   alarms   : None

  DS3   alarms   : None

  DS1   defects  : None

  DS3   defects  : None

  Logical interface t1-2/1/0:20.0 (Index 74) (SNMP ifIndex 213) 

    Flags: Point-To-Point SNMP-Traps Encapsulation: Cisco-HDLC

    Protocol inet, MTU: 1500

      Flags: None

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 10.10.1.1, Local: 10.10.1.2

What It Means

The sample output shows that the physical link is up and there are no DS-1 or DS-3 alarms or defects. You should not see any DS-1 or DS-3 alarms. You can check any interface on the Channelized DS-3 port. See "Locate Channelized DS-3 Alarms and Errors" for more information on Channelized DS-3 alarms and errors.