R0106-HP MSR Router Series Layer 2 - WAN Configuration Guide(V7)

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Managing a 3G/4G modem
A 3G/4G modem connects a device to a 3G/4G network.
3G/4G modem modules include USB 3G modem modules and SIC-3G/4G modem modules. They are
managed in cellular interface view.
• A USB 3G modem module is hot swappable. It is managed in a fixed cellular interface view. The
cellular interface varies by the device model. Even if no USB 3G modem module is installed, you
can enter the interface view. The cellular interface remains after the USB 3G modem module is
removed from the router.
• A SIC-3G/4G modem module is not hot swappable. When a SIC-3G modem is installed, the
cellular interface is created based on the slot of the modem. When the SIC-3G/4G modem is
removed, the system removes this cellular interface.
A cellular interface can be channelized into a serial or an Eth-channel interface. Both the serial and
Eth-channel interfaces operate in protocol mode. 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 3G modem can only be channelized into a serial interface. The cellular
interface of a 4G modem can only be channelized into an Eth-channel interface.
Configuration restrictions and guidelines
Follow these restrictions and guidelines when you configure 3G/4G modem management:
• Do not remove a USB 3G modem while it is transmitting data. HP recommends that you execute the
shutdown command to shut down the USB 3G modem before removing it.
• A USB 3G 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.
• Configure PPP and DDR, and specify an IP address on the serial interface channelized from a
cellular interface of a 3G modem as needed.
• Configure DDR and specify an IP address on the Eth-channel interface channelized from a cellular
interface of a 4G modem as needed.
• Unless otherwise noted, 3G/4G modem configuration in this document is saved in the NVM of the
3G/4G modem. To verify the configuration, use the display cellular command.
3G modem management configuration task list
Tasks at a
g
lance
Configuring a cellular interface for a 3G modem
Configuring a 3G/4G network
Configuring parameter profiles
(Optional.) Configuring PIN verification