Modem Management Configuration Example; Troubleshooting 3G And 4G Modem Management; 3G/4G Modem Failure - HPE FlexNetwork MSR series Configuration Manual

4G modem management configuration example
Network requirements
As shown in
•
The router provides a USB 4G or SIC-4G modem.
•
The PC dials up to access an LTE network through Dial-on-Demand Routing (DDR).
For more information about DDR dialup, see "Configuring DDR."
Figure 51 Network diagram
PC
Configuration procedure
# Configure dialer group 1 and configure DDR to place calls for IP packets.
<Router> system-view
[Router] dialer-group 1 rule ip permit
# Channelize the cellular interface into an Eth-channel interface.
[Router] controller cellular 2/4/0
[Router-Cellular2/4/0] eth-channel 0
[Router-Cellular2/4/0] quit
# Configure an IP address for Eth-channel 2/4/0:0.
[Router] interface eth-channel 2/4/0:0
[Router-Eth-channel2/4/0:0] ip address cellular-alloc
# Enable traditional DDR on Eth-channel 2/4/0:0.
[Router-Eth-channel2/4/0:0] dialer circular enable
# Associate Eth-channel 2/4/0:0 with dialer group 1.
[Router-Eth-channel2/4/0:0] dialer-group 1
# Set the interval for DDR to make the next call attempt to 5 seconds.
[Router-Eth-channel2/4/0:0] dialer timer autodial 5
# Configure the dial string for placing calls as 666666.
[Router-Eth-channel2/4/0:0] dialer number 666666

Troubleshooting 3G and 4G modem management

3G/4G modem failure

Symptom
A 3G/4G modem fails to function correctly. For example, the 3G/4G modem receives no signals or
fails to connect to service providers' networks.
Solution
To resolve the problem:
1. Execute the shutdown command and the undo shutdown command on the cellular interface.
Figure 51:
Router
LTE network
163