Step 5: Verify the Status of the Logical Interface

Action

To verify the status of the logical interface, use the following JUNOS CLI operational mode command:

user@host> show interfaces (ds-fpc/pic/port:channel:channel | 
t1-fpc/pic/port:channel)

Sample Output

The following sample output is for a channelized DS-3 to DS-0 interface:

user@host> show interfaces ds-2/1/0:5:1              

Physical interface: ds-2/1/0:5:1, Enabled, Physical link is Up

  Interface index: 36, SNMP ifIndex: 133

  Description: Customer

  Link-level type: Cisco-HDLC, MTU: 1504, Clocking: Internal, Speed: 64kbps, 
FCS: 16, Mode: M23,

  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: 1 (00:00:06 ago), Output: 1 (00:00:06 ago)

  Input rate     : 0 bps (0 pps)

  Output rate    : 0 bps (0 pps)

  DS1   alarms   : None

  DS3   alarms   : None

  DS1   defects  : None

  DS3   defects  : None

  Logical interface ds-2/1/0:5:1.0 (Index 14) (SNMP ifIndex 134) 

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

    Protocol inet, MTU: 1500, Flags: None

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 10.10.10.196/30, Local: 10.10.10.197

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

user@host> show interfaces t1-2/1/0:19  

Physical interface: t1-2/1/0:19, Enabled, Physical link is Up

  Interface index: 50, SNMP ifIndex: 59

  Description: Customer

  Link-level type: Cisco-HDLC, MTU: 1504, Clocking: Internal, Speed: T1, 
Loopback: None, FCS: 16,

  Mode: M23, 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: 11 (00:00:06 ago), Output: 13 (00:00:04 ago)

  Input rate     : 741512 bps (224 pps)

  Output rate    : 1266528 bps (224 pps)

  DS1   alarms   : None

  DS3   alarms   : None

  DS1   defects  : None

  DS3   defects  : None

  Logical interface t1-2/1/0:19.0 (Index 27) (SNMP ifIndex 125) 

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

    Protocol inet, MTU: 1500, Flags: None

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 10.10.10.196/30, Local: 10.10.10.197

What It Means

The sample output shows that both channelized interfaces have the physical and logical links up.