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Step 2: Display the Status of a Specific Channelized DS-3 Interface

Action

To display the status of a specific Channelized DS-3 interface, use the following JUNOS CLI operational mode command:

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

Sample Output 1

user@host> show interfaces t1-1/2/0:5

  Physical interface: t1-1/2/0:5, Enabled, Physical link is Up

    Interface index: 181, SNMP ifIndex: 210

    Description: T1 to Tombstone - Circuit # 123456789

    Link-level type: PPP, MTU: 1504, Clocking: Internal, Speed: T1, Loopback: 
None, FCS: 16, Framing: ESF,

    Parent: ct3-1/2/0 Interface index 173

    Device flags   : Present Running

    Interface flags: Point-To-Point SNMP-Traps

    Link flags     : Keepalives

    Keepalive settings: Interval 60 seconds, Up-count 1, Down-count 3

    Keepalive: Input: 6898 (00:00:48 ago), Output: 6874 (00:00:07 ago)

    LCP state: Opened

    NCP state: inet: Opened, inet6: Not-configured, iso: Not-configured, mpls: 
Not-configured

    CHAP state: Not-configured

    CoS queues     : 4 supported

    Last flapped   : 2004-05-11 16:01:30 EDT (5d 02:41 ago)

    Input rate     : 2648 bps (6 pps)

    Output rate    : 14608 bps (4 pps)

    DS1   alarms   : None

    DS1   defects  : None

    Logical interface t1-1/2/0:5.0 (Index 86) (SNMP ifIndex 238)

      Flags: Point-To-Point SNMP-Traps Encapsulation: PPP

      Protocol inet, MTU: 1500

        Flags: None

        Addresses, Flags: Is-Preferred Is-Primary

          Destination: 68.71.141.32/30, Local: 68.71.141.33, Broadcast: 
68.71.141.35

Sample Output 2

user@host> show interfaces t1-0/3/3:2

Physical interface: t1-0/3/3:2, Enabled, Physical link is Up

  Interface index: 239, SNMP ifIndex: 127

  Description:

  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: 124789 (00:00:08 ago), Output: 125379 (00:00:04 ago)

  CoS queues     : 4 supported

  Last flapped   : 2004-04-30 09:12:44 UTC (2w0d 10:45 ago)

  Input rate     : 3984 bps (10 pps)

  Output rate    : 56328 bps (14 pps)

  DS1   alarms   : None

  DS3   alarms   : None

  DS1   defects  : None

  DS3   defects  : None

  Logical interface t1-0/3/3:2.0 (Index 132) (SNMP ifIndex 236)

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

  Input packets : 33897375

  Output packets: 40673351

    Protocol inet, MTU: 1500

      Flags: No-Redirects, uRPF, uRPF-loose

      Addresses, Flags: Primary Is-Preferred Is-Primary

        Destination: 10.10.10.52/30, Local: 10.10.10.53,

        Broadcast: 10.10.10.55

Sample Output 3

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

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

  Interface index: 177, SNMP ifIndex: 205

  Description: T1 to Bedrock #1 - RESERVED

  Link-level type: PPP, MTU: 1504, Clocking: Internal, Speed: T1, Loopback: 
None, FCS: 16, Framing: ESF,

  Parent: ct3-1/2/0 Interface index 173

  Device flags   : Present Running Down

  Interface flags: Hardware-Down Point-To-Point SNMP-Traps

  Link flags     : Keepalives

  CoS queues     : 4 supported

  Last flapped   : 2004-04-02 09:12:49 EST (6w2d 08:29 ago)

  Input rate     : 0 bps (0 pps)

  Output rate    : 0 bps (0 pps)

  DS1   alarms   : AIS, LOF

  DS1   defects  : AIS, LOF

Sample Output 4

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

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

    Interface index: 148, SNMP ifIndex: 224

    Description: T1 to Rock City #6 - Circuit # 987654321

    Link-level type: PPP, MTU: 1504, Clocking: Internal, Speed: T1, Loopback: 
None, FCS: 16, Framing: ESF,

    Parent: ct3-1/2/0 Interface index 173

    Device flags   : Present Running Down

    Interface flags: Hardware-Down Point-To-Point SNMP-Traps

    Link flags     : Keepalives

    Keepalive settings: Interval 60 seconds, Up-count 1, Down-count 3

    Keepalive: Input: 0 (never), Output: 0 (never)

    LCP state: Conf-req-sent

    NCP state: inet: Down, inet6: Not-configured, iso: Not-configured, mpls: 
Not-configured

    CHAP state: Not-configured

    CoS queues     : 4 supported

    Last flapped   : 2004-05-14 15:56:43 EDT (2d 02:47 ago)

    Input rate     : 0 bps (0 pps)

    Output rate    : 0 bps (0 pps)

    DS1   alarms   : AIS, LOF

    DS1   defects  : AIS, LOF

    Logical interface t1-1/2/0:19.0 (Index 91) (SNMP ifIndex 256)

      Flags: Hardware-Down Device-Down Point-To-Point SNMP-Traps Encapsulation: 
PPP

      Protocol inet, MTU: 1500

        Flags: Protocol-Down

        Addresses, Flags: Dest-route-down Is-Preferred Is-Primary

          Destination: 68.71.141.136/30, Local: 68.71.141.137, Broadcast: 
68.71.141.139

What It Means

The first line of the output shows the status of the channel. If this line shows that the physical link is up, the physical link is healthy and can pass packets. If this line shows that the physical link is down, the physical link is unhealthy and cannot pass packets.

Sample output 1 shows a channel that is connected and operating correctly. You can verify the following information to check that the interface is functioning correctly:

Encapsulation used on the physical interface, Link-level type: PPP
Reference clock source, Clocking: Internal
Frame checksum sequence, FCS: 16
Physical layer framing format used on the link, Framing: ESF

Because the link-level type is Point-to-Point Protocol (PPP), the link control protocol (LCP) state is Opened, and the network control protocol (NCP) state has one protocol, NCP: inet: Opened, indicating that the link is healthy. There are no DS-1 alarms or defects.

Sample output 2 shows a channel that is connected and operating correctly. However, this channel has Cisco HDLC configured as the link-level type and a logical interface (t1-0/3/3:2.0) configured.

Sample output 3 shows a channel that is not connected, Physical link is Down. Loopback is not configured, Loopback: None, and the input and output counters are zero. In addition, there are alarm indication signal (AIS) and loss of frame (LOF) alarms and defects.

Sample output 4 shows a channel that is assigned but down, Physical link is Down. Information about the physical interfaces shows the device flags are Present Running Down, and one of the interface flags is Hardware-Down. In addition, interface protocol initialization failed to complete successfully on logical interface t1-1/2/0:19.0, Flags: Hardware-Down Device-Down.

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