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Verifying the USB Modem Configuration

To verify a USB modem configuration, perform the following tasks:

Verifying a USB Modem Interface

Purpose

Verify that the USB modem interface is correctly configured and display the status of the modem.

Action

From the CLI, enter the show interfaces extensive command.

   
user@host> show interfaces umd0 extensive 
Physical interface: umd0, Enabled, Physical link is Up
  Interface index: 64, SNMP ifIndex: 33, Generation: 1
  Type: Async-Serial, Link-level type: PPP-Subordinate, MTU: 1504, 
Clocking: Unspecified, Speed: MODEM
  Device flags   : Present Running
  Interface flags: Point-To-Point SNMP-Traps Internal: 0x4000
  Link flags     : None
  Hold-times     : Up 0 ms, Down 0 ms
  Last flapped   : Never
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :                21672
   Output bytes  :                22558
   Input  packets:                 1782
   Output packets:                 1832
  Input errors:
    Errors: 0, Drops: 0, Framing errors: 0, Runts: 0, Giants: 0, Policed discards: 0, 
Resource errors: 0
  Output errors:
    Carrier transitions: 63, Errors: 0, Drops: 0, MTU errors: 0, Resource errors: 0
  MODEM status:
    Modem type                    : LT V.92 1.0 MT5634ZBA-USB-V92 Data/Fax Modem 
(Dual Config) Version 2.27m
    Initialization command string : ATS0=2
    Initialization status         : Ok
    Call status                   : Connected to 4085551515
    Call duration                 : 13429 seconds
    Call direction                : Dialin
    Baud rate                     : 33600 bps
    Most recent error code        : NO CARRIER

  Logical interface umd0.0 (Index 2) (SNMP ifIndex 34) (Generation 1)
    Flags: Point-To-Point SNMP-Traps Encapsulation: PPP-Subordinate

What it Means

The output shows a summary of interface information and displays the modem status.

Verify the following information:

Determine the following information:

Verifying Dialer Interface Configuration

Purpose

Verify that the dialer interface is correctly configured.

Action

From the CLI, enter the show interfaces extensive command.

   
user@host> show interfaces dl0 extensive 
Physical interface: dl0, Enabled, Physical link is Up
  Interface index: 128, SNMP ifIndex: 24, Generation: 129
  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 70) (SNMP ifIndex 75) (Generation 146)
    Description: USB-modem-remote-management
    Flags: Point-To-Point SNMP-Traps 0x4000 LinkAddress 23-0 Encapsulation: PPP
    Dialer:  
      State: Active, Dial pool: usb-modem-dialer-pool
      Dial strings: 220
      Subordinate interfaces: umd0 (Index 64)
      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: 115200
    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
  LCP state: Opened 
  NCP state: inet: Opened, inet6: Not-configured, iso: Not-configured, 
mpls: Not-configured
  CHAP state: Success
    Protocol inet, MTU: 1500, Generation: 136, Route table: 0
      Flags: None   
      Addresses, Flags: Is-Preferred Is-Primary
        Destination: 172.20.10.1, Local: 172.20.10.2, Broadcast: Unspecified, 
Generation: 134

What it Means

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

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

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