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: 
  CES: 0, 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: 143, SNMP ifIndex: 59, Generation: 24
  Type: BRI, Link-level type: Controller, MTU: 4092, Clocking: 1, Speed: 144kbps, 
  Parent: None
  Device flags   : Present Running
  Interface flags: Point-To-Point SNMP-Traps Internal: 0x4000
  Link type      : Full-Duplex
  Link flags     : None
  Physical info  : S/T
  Hold-times     : Up 0 ms, Down 0 ms
  Last flapped   : 2005-12-07 12:21:11 UTC (04:07:26 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-6/0/4:1, Administratively down, Physical link is Up
  Interface index: 145, SNMP ifIndex: 75, Generation: 26
  Type: Serial, Link-level type: Multilink-PPP, MTU: 1510, Clocking: Internal,
  Speed: 64kbps, 
  Parent: br-0/0/4 Interface index 143
  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, 8 maximum usable queues
  Last flapped   : Never
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :                 5787                    0 bps
   Output bytes  :                 3816                    0 bps
   Input  packets:                  326                    0 pps
   Output packets:                  264                    0 pps
  Input errors:
    Errors: 0, Drops: 0, Framing errors: 0, Runts: 0, Giants: 0, Policed discards: 6,
    Resource errors: 0
  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                     0                 0
       1 best-effort                 0                     0                 0
       2 best-effort                 5                     0                 0
       3 best-effort              5624                  5624                 0
    Packet Forwarding Engine configuration:
    Destination slot: 5, PLP byte: 1 (0x00)
    CoS transmit queue               Bandwidth               Buffer Priority   Limit
                              %            bps     %           usec
    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 71) (SNMP ifIndex 61) (Generation 33)
    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: 144, SNMP ifIndex: 60, Generation: 25
  Type: Serial, Link-level type: 55, MTU: 4092, Clocking: Internal, Speed: 16kbps,
  Parent: br-0/0/4 Interface index 143
  Device flags   : Present Running
  Interface flags: SNMP-Traps Internal: 0x4000
  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   : 2005-12-07 12:21:12 UTC (05:46:00 ago)
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :                13407                    0 bps
   Output bytes  :                16889                    0 bps
   Input  packets:                 3262                    0 pps
   Output packets:                 3262                    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: 1, Errors: 0, Drops: 0, MTU errors: 0, Resource errors: 0
  ISDN  alarms   : None
  ISDN media:            Seconds        Count  State
    LOF                       0            1  0K
    LOS                       0            0  0K

  Logical interface dc-0/0/4.32767 (Index 70) (SNMP ifIndex 72) (Generation 8)
    Flags: Point-To-Point SNMP-Traps Encapsulation: 60
    Traffic statistics:
     Input  bytes  :                13407
     Output bytes  :                82129
     Input  packets:                 3262
     Output packets:                 3262
    Local statistics:
     Input  bytes  :                13407
     Output bytes  :                82129
     Input  packets:                 3262
     Output packets:                 3262

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

Display the status of ISDN calls. This information helps you to verify the dialer interface configuration as described in Verifying Dialer Interface Configuration.

Action

From the CLI, enter the show isdn calls command.

Sample Output

Interface: bc-6/0/0:1
  Status: No call in progress
  Most recent error code: No error
Interface: bc-6/0/0:2
  Status: Connected to 384070
  Call Duration: 43 seconds
  Call Direction: Dialout
  Most recent error code: No error

What it Means

The output shows a summary of active ISDN calls on B-channel interfaces. Determine the following information:

• The interfaces on which ISDN calls are in progress
• Whether the call is a dial-in call, dial-out call, or a callback call

Purpose

Verify that the dialer interface is correctly configured. To determine the ISDN interfaces on which calls are taking place, see Displaying the Status of ISDN Calls.

Action

From the CLI, enter the show interfaces extensive command.

Sample Output

Physical interface: dl0, Enabled, Physical link is Up
  Interface index: 173, SNMP ifIndex: 26, Generation: 77
  Type: 27, Link-level type: PPP, MTU: 1504, Clocking: Unspecified, Speed: Unspecified
  Device flags   : Present Running
  Interface flags: SNMP-Traps
  Link type      : Full-Duplex
  Link flags     : Keepalives
  Physical info  : Unspecified
  Hold-times     : Up 0 ms, Down 0 ms
  Current address: Unspecified, Hardware address: Unspecified
  Alternate link address: Unspecified
  Last flapped   : Never
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :                13859                    0 bps
   Output bytes  :                    0                    0 bps
   Input  packets:                  317                    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

  Logical interface dl0.0 (Index 76) (SNMP ifIndex 28) (Generation 148)
    Flags: Point-To-Point SNMP-Traps 0x4000 LinkAddress 23-0 Encapsulation: PPP
    Dialer:  
      State: Active, Dial pool: 1
      Dial strings: 384070
      Subordinate interfaces: bc-6/0/0:2 (Index 172)
      Watch list: 11.12.13.14/32
      Activation delay: 0, Deactivation delay: 0
      Initial route check delay: 120
      Redial delay: 3
      Callback wait period: 5
      Load threshold: 0, Load interval: 60
    Bandwidth: 64kbps
    Traffic statistics:
     Input  bytes  :                24839
     Output bytes  :                17792
     Input  packets:                  489
     Output packets:                  340
    Local statistics:
     Input  bytes  :                10980
     Output bytes  :                17792
     Input  packets:                  172
     Output packets:                  340
    Transit statistics:
     Input  bytes  :                13859                    0 bps
     Output bytes  :                    0                    0 bps
     Input  packets:                  317                    0 pps
     Output packets:                    0                    0 pps
  Keepalive settings: Interval 10 seconds, Up-count 1, Down-count 3
  Keepalive statistics:
    Input : 0 (last seen: never)
    Output: 36 (last sent 00:00:09 ago)
  LCP state: Opened 
  NCP state: inet: Opened, inet6: Not-configured, iso: Not-configured, 
  mpls: Not-configured
  CHAP state: Success
    Protocol inet, MTU: 1500, Generation: 74, Route table: 0
      Flags: Negotiate-Address
      Addresses, Flags: Kernel Is-Preferred Is-Primary
        Destination: 43.1.1.2, Local: 43.1.1.19, Broadcast: Unspecified, 
        Generation: 37

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.
• The dialer state is Active when an ISDN call is in progress.
• The LCP state is Opened when an ISDN call is in progress. An LCP state of Closed or Not Configured indicates a problem with the dialer configuration that needs to be debugged with the monitor traffic interface interface-name command. For information about the monitor traffic command, see the J-series Services Router Administration Guide.

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