Contents

Managing a 4G modem·· 1

About managing a 4G modem·· 1

Restrictions: Hardware compatibility with 4G modem management 1

4G modem management tasks at a glance· 2

Configuring the 4G modem cellular interface· 3

Configuring an Eth-channel interface for a 4G modem·· 3

Configuring basic parameters for an Eth-channel interface· 3

Restoring the default settings for an Eth-channel interface· 4

Specifying the primary or secondary SIM card· 4

Associating 4G link backup with a track entry· 4

Issuing a configuration directive to a 4G modem·· 5

Configuring 4G modem reboot 5

Rebooting a 4G modem manually· 5

Display and maintenance commands for 4G modem management 5

Troubleshooting· 6

4G modem malfuntion· 6

Managing a 4G modem

About managing a 4G modem

A 4G modem connects a device to a 4G network.

The device supports SIC 4G modems. A SIC 4G modem is not hot swappable. After a SIC 4G modem is installed, the device creates a cellular interface dynamicaly based on the slot number of the modem and uses the interface to manage the modem. When the modem is removed from the device, the system removes the cellular interface and its configuration.

A cellular interface can be channelized into a serial or an Eth-channel interface. The data link layer protocols of the serial interface and Eth-channel interface are PPP and Ethernet, respectively. The two interfaces support IP at the network layer.

The cellular interface of a 4G modem can be channelized only into an Eth-channel interface.

Restrictions: Hardware compatibility with 4G modem management

Hardware series	Model	Product code	4G modem management compatibility
WX1800H series	WX1804H-PWR	EWP-WX1804H-PWR-CN	No
WX2500H series	WX2508H-PWR-LTE WX2510H-PWR WX2510H-F-PWR WX2540H WX2540H-F WX2560H	EWP-WX2508H-PWR-LTE EWP-WX2510H-PWR EWP-WX2510H-F-PWR EWP-WX2540H EWP-WX2540H-F EWP-WX2560H	Yes: EWP-WX2508H-PWR-LTE No: ·     EWP-WX2510H-PWR ·     EWP-WX2510H-F-PWR ·     EWP-WX2540H ·     EWP-WX2540H-F ·     EWP-WX2560H
MAK series	MAK204 MAK206	EWP-MAK204 EWP-MAK206	No
WX3000H series	WX3010H WX3010H-X-PWR WX3010H-L-PWR WX3024H WX3024H-L-PWR WX3024H-F	EWP-WX3010H EWP-WX3010H-X-PWR EWP-WX3010H-L-PWR EWP-WX3024H EWP-WX3024H-L-PWR EWP-WX3024H-F	No
WX3500H series	WX3508H WX3508H WX3510H WX3510H WX3520H WX3520H-F WX3540H WX3540H	EWP-WX3508H EWP-WX3508H-F EWP-WX3510H EWP-WX3510H-F EWP-WX3520H EWP-WX3520H-F EWP-WX3540H EWP-WX3540H-F	No
WX5500E series	WX5510E WX5540E	EWP-WX5510E EWP-WX5540E	No
WX5500H series	WX5540H WX5560H WX5580H	EWP-WX5540H EWP-WX5560H EWP-WX5580H	No
Access controller modules	LSUM1WCME0 EWPXM1WCME0 LSQM1WCMX20 LSUM1WCMX20RT LSQM1WCMX40 LSUM1WCMX40RT EWPXM2WCMD0F EWPXM1MAC0F	LSUM1WCME0 EWPXM1WCME0 LSQM1WCMX20 LSUM1WCMX20RT LSQM1WCMX40 LSUM1WCMX40RT EWPXM2WCMD0F EWPXM1MAC0F	No

‌

Hardware series	Model	Product code	4G modem management compatibility
WX1800H series	WX1804H-PWR WX1810H-PWR WX1820H WX1840H	EWP-WX1804H-PWR EWP-WX1810H-PWR EWP-WX1820H EWP-WX1840H-GL	No
WX3800H series	WX3820H WX3840H	EWP-WX3820H-GL EWP-WX3840H-GL	No
WX5800H series	WX5860H	EWP-WX5860H-GL	No

‌

 

Restrictions and guidelines: 3G/4G modem management

Follow these restrictions and guidelines when you configure 3G/4G modem management:

·     Do not remove a USB 3G/4G modem while it is transmitting data. As a best practice, execute the shutdown command to shut down the USB 3G/4G modem before removing it.

·     A USB 3G/4G modem is not usable when the USB interface to which the modem is attached is shut down. For more information about shutting down a USB interface, see Fundamentals Configuration Guide.

·     Unless otherwise noted, the 3G/4G modem configuration in this document is saved in the non-volatile storage on the 3G/4G modem. To verify the configuration, use the display cellular command.

4G modem management tasks at a glance

To manage a 4G modem, perform the following tasks:

1.     Configuring an Eth-channel interface for a 4G modem

2.     (Optional.) Associating 4G link backup with a track entry

3.     (Optional.) Issuing a configuration directive to a 4G modem

4.     (Optional.) Configuring 4G modem reboot

¡     Rebooting a 4G modem manually

Configuring the 4G modem cellular interface

1.     Enter system view.

system-view

2.     Enter cellular interface view.

controller cellular cellular-number

3.     Configure a description for the cellular interface.

description text

By default, the description for a cellular interface is interface name Interface, for example, Cellular 1/0/6 Interface.

4.     Channelize the cellular interface into an Eth-channel interface.

eth-channel channel-number

This command names the Eth-channel interface as eth-channel cellular-number:channel-number.

Configure DDR and specify an IP address for the Eth-channel interface channelized from the cellular interface of a 4G modem as needed.

5.     Bring up the cellular interface.

undo shutdown

By default, a cellular interface is up.

Configuring an Eth-channel interface for a 4G modem

Configuring basic parameters for an Eth-channel interface

1.     Enter system view.

system-view

2.     Enter Eth-channel interface view.

interface eth-channel interface-number

3.     Configure a description of the Eth-channel interface.

description text

By default, the description for an Eth-channel interface is interface name Interface, for example, Echannel 1/0/6:0 Interface.

4.     Set the MTU for the Eth-channel interface.

mtu size

By default, the MTU for an Eth-channel interface is 1500 bytes.

5.     Set the expected bandwidth of the Eth-channel interface.

bandwidth bandwidth-value

By default, the expected bandwidth (in kbps) of an Eth-channel is the interface baud rate divided by 1000.

The baud rate of an Eth-channel interface is 100 Mbps.

6.     Bring up the Eth-channel interface.

undo shutdown

Restoring the default settings for an Eth-channel interface

Restrictions and guidelines

	CAUTION: Restoring the default interface settings might interrupt ongoing network services. Make sure you are fully aware of the impact of this command when you use it on a live network.

 

The default command might fail to restore the default settings for some commands for reasons such as command dependencies and system restrictions. Use the display this command in interface view to identify these commands. Then use their undo forms or follow the command reference to individually restore their default settings. If your restoration attempt still fails, follow the error message instructions to resolve the problem.

Procedure

1.     Enter system view.

system-view

2.     Enter Eth-channel interface view.

interface eth-channel interface-number

3.     Restore the default configurations.

default

Specifying the primary or secondary SIM card

About this task

On a device that uses dual SIM card, you can specify the use of the secondary SIM card when one of the following problems occurs:

·     The 4G link signals of the primary SIM card are weak.

·     The service provider network that the primary SIM card connects to is unavailable.

·     The primary SIM card has failed.

If the problems of the primary SIM card are resolved, you can specify the use of the primary SIM card or enable the 3G/4G modem to automatically switch back to the primary SIM card.

Procedure

1.     Enter system view.

system-view

2.     Enter cellular interface view.

controller cellular interface-number

3.     Specify the primary or secondary SIM card.

sim switch-to card-number

By default, a 4G modem uses the primary SIM card.

Associating 4G link backup with a track entry

About this task

This configuration allows the system to use a track entry to monitor the status of the primary 4G link. When the track entry state changes from Positive to Negative, the secondary 4G link takes over.

Procedure

1.     Enter system view.

system-view

2.     Enter cellular interface view.

controller cellular interface-number

Issuing a configuration directive to a 4G modem

Restrictions and guidelines

Configuration directives might cause malfunction of a 4G modem. When you issue a configuration directive to the modem, make sure you understand the impact on the 4G modem.

Procedure

1.     Enter system view.

system-view

2.     Enter cellular interface view.

controller cellular interface-number

3.     Issue a configuration directive to the 4G modem.

sendat at-string

Configuring 4G modem reboot

Rebooting a 4G modem manually

About this task

A 4G modem can automatically detect running errors and reboot. If the 4G modem fails to reboot by itself, you can use this command to manually reboot it.

Procedure

1.     Enter system view.

system-view

2.     Enter cellular interface view.

controller cellular interface-number

3.     Manually reboot the 4G modem.

modem reboot

 

	CAUTION: This command will disconnect the established 3G/4G modem connections. Execute this command with caution.

 

Display and maintenance commands for 4G modem management

Execute display commands in any view and the reset command in user view.

 

Task	Command
Display the call connection information for the 4G modem.	display cellular [ interface-number ]
Display information about a cellular interface.	display controller [ cellular [ interface-number ] ]
Display information about an Eth-channel interface.	display interface [ eth-channel [ channel-id ] ] [ brief [ description | down ] ]
Clear the statistics for a cellular interface.	reset counters controller [ cellular [ interface-number ] ]
Clear the statistics for an Eth-channel interface.	reset counters interface [ eth-channel [ channel-id ] ]

 

Troubleshooting

4G modem malfuntion

Symptom

A 4G modem fails to function correctly. For example, the 4G modem receives no signals or fails to connect to service providers' networks.

Solution

To resolve the issue:

1.     Execute the shutdown command and the undo shutdown command on the cellular interface.

2.     If the 4G modem still fails to function, execute the modem reboot command on the cellular interface.

3.     If the issue persists, contact H3C Support.