The router MSR810-LUS 4G SIM card dial-up interface is not up

Not involved

When the basic network dial-up configuration of the 4G card is correct, the interface is never up.

Equipment model: 

MSR810 Version 7.1.064, Release 0605P05C

Related configuration:

[H3C]controller Cellular1/0 

[H3C-Cellular1/0]eth-channel 0

[H3C]dialer-group 1 rule ip permit

[H3C]interface eth-channel 1/0:0 //Enter the Ethernet channel interface view

[H3C-Eth-channel1/0:0]dialer circular enable

[H3C-Eth-channel1/0:0]dialer-group 1

[H3C-Eth-channel1/0:0]dialer timer idle 0

[H3C-Eth-channel1/0:0]dialer timer autodial 60

[H3C-Eth-channel1/0:0]dialer number *99# autodial 

[H3C-Eth-channel1/0:0]ip address cellular-alloc

[H3C-Eth-channel1/0:0]nat outbound

[H3C-Eth-channel1/0:0]quit

[H3C] ip route-static 0.0.0.0 0 Eth-channel1/0:0 

Check the configuration and there is no problem. Display device shows that the 4G card status is normal and there is no problem. Check dis cellular and find that the module status is online and normal, the current service status is Limited, and the current RSRP strength is -105dBm. Instruct the customer to go to a place with better signal for testing, and the problem has been solved.

When the service status is Limited, it usually means that the signal is weak (less than -90) or there is a problem with the network selection mode. 

It is recommended to modify Network Selection Mode: LTE to automatic mode.

# Set 4G Modem automatic selection

<Sysname> system-view
[Sysname] controller cellular 2/4/0
[Sysname-Cellular2/4/0]mode auto