Verifying the ISDN Configuration

To verify an ISDN configuration, perform the following tasks:

Purpose

Display the status of ISDN parameters on the ISDN interface. For example, you can display ISDN parameters on the br-6/0/0 interface.

Action

From the operational mode in the CLI, enter show isdn status.

Sample Output

  Interface:br–6/0/0
   Layer 1 status: active
	Layer 2 status: Q.921: up, TEI:12
	Layer 3 status: 1 Active calls
  		Switch Type           = ETSI
  		Interface Type        = USER
  		T306                  = 10 seconds
  		T310                  = 10 seconds
 		Tei Option            = Power Up

What it Means

The output shows a summary of interface information. Verify the following information:

• Interface—ISDN interface currently active on the Services Router.
• Layer 1 status—Displays as active or inactive.
• Layer 2 status—Displays Q.921 as up or down.
• TEI—Displays the assigned TEI number.
• Layer 3 status—Displays the number of active calls.
• Switch Type—Type of ISDN switch connected to the Services Router interface.
• Interface Type—Default value for the local interface.
• Calling number—Displays the telephone number configured for dial out.
• T306 and T310—Q.931 specific timers.
• TEI Option—Determines when TEI negotiations occur on the interface.

Purpose

Verify that the ISDN interface is correctly configured.

Action

From the CLI, enter the show interfaces extensive command.

Sample Output

 
Physical interface: br-6/0/0, Enabled, Physical link is Up
  Interface index: 144, SNMP ifIndex: 27, Generation: 25
  Type: Serial, Link-level type: Controller, MTU: 4092, Clocking: Internal, Speed: 144kbps,
  Parent: None
  Device flags   : Present Running
  Interface flags: Point-To-Point SNMP-Traps 16384
  Link type      : Full-Duplex
  Link flags     : None
  Physical info  : Unspecified
  Hold-times     : Up 0 ms, Down 0 ms
  Current address: Unspecified, Hardware address: Unspecified
  Alternate link address: Unspecified
  Last flapped   : 2005-04-25 22:03:53 UTC (02:12:33 ago)
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :                    0                    0 bps
   Output bytes  :                    0                    0 bps
   Input  packets:                    0                    0 pps
   Output packets:                    0                    0 pps
  Input errors:
    Errors: 0, Drops: 0, Framing errors: 0, Runts: 0, Giants: 0, Policed discards: 0,
    Resource errors: 0
  Output errors:
    Carrier transitions: 0, Errors: 0, Drops: 0, MTU errors: 0, Resource errors: 0

What it Means

The output shows a summary of interface information. Verify the following information:

• The physical interface is Enabled. If the interface is shown as Disabled, do either of the following:
  • In the CLI configuration editor, delete the disable statement at the [edit interfaces interface-name] level of the configuration hierarchy.
  • In the J-Web configuration editor, clear the Disable check box on the Interfaces>interface-name page.
• The physical link is Up. A link state of Down indicates a problem with the interface module, interface port, or physical connection (link-layer errors).
• The Last Flapped time is an expected value. The Last Flapped time indicates the last time the physical interface became unavailable and then available again. Unexpected flapping indicates likely link-layer errors.
• The traffic statistics reflect expected input and output rates. Verify that the number of inbound and outbound bytes and packets matches expected throughput for the physical interface. To clear the statistics and see only new changes, use the clear interfaces statistics interface-name command.

Purpose

Verify that the ISDN B-channel interface is correctly configured.

Action

From the CLI, enter the show interfaces extensive command.

Sample Output

  
Physical interface: bc-0/0/4:1, Administratively down, Physical link is Up
  Interface index: 144, SNMP ifIndex: 51, Generation: 25
  Type: Serial, Link-level type: Multilink-PPP, MTU: 1510, Clocking: Internal, 
  Speed: 64kbps,
  Parent: br-0/0/4 Interface index 142
  Device flags   : Present Running
  Interface flags: Admin-Test SNMP-Traps 16384
  Link type      : Full-Duplex
  Link flags     : None
  Physical info  : Unspecified
  Hold-times     : Up 0 ms, Down 0 ms
  Current address: Unspecified, Hardware address: Unspecified
  Alternate link address: Unspecified
  CoS queues     : 8 supported
  Last flapped   : Never
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :            149289226                    0 bps
   Output bytes  :            166219636                    0 bps
   Input  packets:               278442                    0 pps
   Output packets:               319599                    0 pps
  Input errors:
    Errors: 0, Drops: 0, Framing errors: 0, Runts: 0, Giants: 0, Policed discards: 2481,
    Resource errors: 44
  Output errors:
    Carrier transitions: 0, Errors: 0, Drops: 0, MTU errors: 0, Resource errors: 0
  Queue counters:       Queued packets  Transmitted packets      Dropped packets
    0 best-effort               314335               314335                    0
    1 expedited-fo                   0                    0                    0
    2 assured-forw                   0                    0                    0
    3 network-cont                5264                 5264                    0
  Packet Forwarding Engine configuration:
    Destination slot: 0, PLP byte: 1 (0x00)
    CoS transmit queue               Bandwidth               Buffer Priority   Limit
                              %            bps     %          bytes
    0 best-effort            95          60800    95              0      low    none
    3 network-control         5           3200     5              0      low    none

  Logical interface bc-0/0/4:1.0 (Index 72) (SNMP ifIndex 55) (Generation 19)
    Flags: Device-Down Point-To-Point SNMP-Traps Encapsulation: PPP
    Protocol mlppp, Multilink bundle: dl0.0, MTU: 1506, Generation: 18, Route table: 0

What it Means

The output shows a summary of B-channel interface information. Verify the following information:

• The physical interface is Enabled. If the interface is shown as Disabled, do either of the following:
  • In the CLI configuration editor, delete the disable statement at the [edit interfaces interface-name] level of the configuration hierarchy.
  • In the J-Web configuration editor, clear the Disable check box on the Interfaces>interface-name page.
• The physical link is Up. A link state of Down indicates a problem with the interface module, interface port, or physical connection (link-layer errors).
• The Last Flapped time is an expected value. The Last Flapped time indicates the last time the physical interface became unavailable and then available again. Unexpected flapping indicates possible link-layer errors.
• The traffic statistics reflect expected input and output rates. Verify that the number of inbound and outbound bytes and packets matches expected throughput for the physical interface. To clear the statistics and see only new changes, use the clear interfaces statistics interface-name command.

Purpose

Verify that the ISDN D-channel interface is correctly configured.

Action

From the CLI, enter the show interfaces extensive command.

Sample Output

      
Physical interface: dc-0/0/4, Enabled, Physical link is Up
  Interface index: 143, SNMP ifIndex: 49, Generation: 24
  Type: Serial, Link-level type: 55, MTU: 1504, Clocking: Internal, Speed: 16kbps,
  Parent: br-0/0/4 Interface index 142
  Device flags   : Present Running
  Interface flags: SNMP-Traps 16384
  Link type      : Full-Duplex
  Link flags     : None
  Physical info  : Unspecified
  Hold-times     : Up 0 ms, Down 0 ms
  Current address: Unspecified, Hardware address: Unspecified
  Alternate link address: Unspecified
  Last flapped   : 2005-04-23 13:07:53 PDT (2d 05:25 ago)
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :                58975                    0 bps
   Output bytes  :                73967                    0 bps
   Input  packets:                14674                    0 pps
   Output packets:                14685                    0 pps
  Input errors:
    Errors: 0, Drops: 0, Framing errors: 0, Runts: 0, Giants: 0, Policed discards: 0,
    Resource errors: 0
  Output errors:
    Carrier transitions: 5, Errors: 0, Drops: 0, MTU errors: 0, Resource errors: 0
  ISDN  alarms   : None
  ISDN media:            Seconds        Count  State
    LOF                       0            2  0K
    LOS                       0            1  0K
                    
  Logical interface dc-0/0/4.32767 (Index 71) (SNMP ifIndex 50) (Generation 9)
    Flags: Point-To-Point SNMP-Traps Encapsulation: 60
    Traffic statistics:
     Input  bytes  :                58975
     Output bytes  :                59282
     Input  packets:                14674
     Output packets:                14685
    Local statistics:
     Input  bytes  :                58975
     Output bytes  :                59282
     Input  packets:                14674
     Output packets:                14685

What it Means

The output shows a summary of D-channel interface information. Verify the following information:

• The physical interface is Enabled. If the interface is shown as Disabled, do either of the following:
  • In the CLI configuration editor, delete the disable statement at the [edit interfaces interface-name] level of the configuration hierarchy.
  • In the J-Web configuration editor, clear the Disable check box on the Interfaces>interface-name page.
• The physical link is Up. A link state of Down indicates a problem with the interface module, interface port, or physical connection (link-layer errors).
• The Last Flapped time is an expected value. The Last Flapped time indicates the last time the physical interface became unavailable and then available again. Unexpected flapping indicates possible link-layer errors.
• The traffic statistics reflect expected input and output rates. Verify that the number of inbound and outbound bytes and packets matches expected throughput for the physical interface. To clear the statistics and see only new changes, use the clear interfaces statistics interface-name command.

Purpose

Verify that the dialer interface is correctly configured.

Action

From the CLI, enter the show interfaces extensive command.

Sample Output

                                            
Physical interface: dl0, Enabled, Physical link is Up
  Interface index: 146, SNMP ifIndex: 53, Generation: 27
  Link-level type: LinkService, MTU: 1504
  Device flags   : Present Running
  Interface flags: Point-To-Point SNMP-Traps
  Last flapped   : 2005-04-23 00:24:29 PDT (2d 18:04 ago)
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :            293333987                    0 bps
   Output bytes  :            328418548                    0 bps
   Input  packets:               365724                    0 pps
   Output packets:               628595                    0 pps
  Frame exceptions:
    Oversized frames                  0
    Errored input frames              0
    Input on disabled link/bundle     0
    Output for disabled link/bundle   0
    Queuing drops                     0
  Buffering exceptions:
    Packet data buffer overflow       0
    Fragment data buffer overflow     0
  Assembly exceptions:
    Fragment timeout                  0
    Missing sequence number           0
    Out-of-order sequence number      0
    Out-of-range sequence number      0
  Hardware errors (sticky):
    Data memory error                 0
    Control memory error              0
  Queue counters:       Queued packets  Transmitted packets      Dropped packets
    0 best-effort               628595               628595                    0
    1 expedited-fo                   0                    0                    0
    2 assured-forw                   0                    0                    0
    3 network-cont                   0                    0                    0

  Logical interface dl0.0 (Index 66) (SNMP ifIndex 54) (Generation 14)
    Flags: Hardware-Down Point-To-Point SNMP-Traps Encapsulation: Multilink-PPP
    Bandwidth: 128kbps
    Bundle options:
      MRRU                            1504
      Drop timer period               0
      Sequence number format          long (24 bits)
      Fragmentation threshold         0
      Links needed to sustain bundle  1
      Interleave fragments            Disabled
    Bundle errors:
      Packet drops                    0 (0 bytes)
      Fragment drops                  202 (121378 bytes)
      MRRU exceeded                   0
      Exception events                0
    Statistics         Frames        fps         Bytes          bps
    Bundle:
      Fragments:
        Input :        557280          0     297042248            0
        Output:        628583          0     332189058            0
      Packets:
        Input :        365718          0     293333755            0
        Output:        628581          0     328417288            0
    Link:
      bc-0/0/4:1.0
        Input :        278289          0     149287251            0
        Output:        314326          0     166146384            0
      bc-0/0/4:2.0
        Input :        278980          0     147754846            0
        Output:        314257          0     166042674            0
    Protocol inet, MTU: 1500, Generation: 15, Route table: 0
      Flags: None
      Addresses, Flags: Dest-route-down Is-Preferred Is-Primary
        Destination: 10.2.0/24, Local: 10.2.0.1, Broadcast: Unspecified, Generation: 19

What it Means

The output shows a summary of dialer interface information. Verify the following information:

• The physical interface is Enabled. If the interface is shown as Disabled, do either of the following:
  • In the CLI configuration editor, delete the disable statement at the [edit interfaces interface-name] level of the configuration hierarchy.
  • In the J-Web configuration editor, clear the Disable check box on the Interfaces>interface-name page.
• The physical link is Up. A link state of Down indicates a problem with the interface module, interface port, or physical connection (link-layer errors).
• The Last Flapped time is an expected value. The Last Flapped time indicates the last time the physical interface became unavailable and then available again. Unexpected flapping indicates possible link-layer errors.
• The traffic statistics reflect expected input and output rates. Verify that the number of inbound and outbound bytes and packets matches expected throughput for the physical interface. To clear the statistics and see only new changes, use the clear interfaces statistics interface-name command.

For complete descriptions of the interface output, see the JUNOS Network and Services Interfaces Command Reference.