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

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4G modem management configuration example

Network requirements

As shown in Figure 47:

• 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 47 Network diagram

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 2/0/0

[Router-Cellular2/0/0] eth-channel 0

[Router-Cellular2/0/0] quit

# Configure an IP address for Eth-channel 2/0/0:0.

[Router] interface eth-channel 2/0/0:0

[Router-Eth-channel2/0/0:0] ip address cellular-alloc

# Enable traditional DDR on Eth-channel 2/0/0:0.

[Router-Eth-channel2/0/0:0] dialer circular enable

# Associate Eth-channel 2/0/0:0 with dialer group 1.

[Router-Eth-channel2/0/0:0] dialer-group 1

# Set the interval for DDR to make the next call attempt to 5 seconds.

[Router-Eth-channel2/0/0:0] dialer timer autodial 5

# Configure the dial string for placing calls as 666666.

[Router-Eth-channel2/0/0:0] dialer number 666666 autodial

Troubleshooting

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:

LTE network

Router