Chapter 2: Setting Up USB Modems for Remote Management

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

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

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.

Verifying a USB Modem Interface 43

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Juniper Networks J-Series manual Verifying a USB Modem Interface