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Specifying the primary and backup profiles
About the primary and backup profiles
By default, profile 1 is used for 3G/4G modem dialup. The dialup fails if profile 1 does not exist.
You can also specify the primary and backup profiles for 3G/4G modem dialup. The primary profile
always has priority over the backup profile. For each dialup connection establishment, the 3G or 4G
modem uses the backup profile only when it has failed to dial up using the primary profile.
Restrictions and guidelines
You must configure the same username and password for the primary and backup profiles.
Specifying the primary and backup profiles for a 3G modem
1. Enter system view.
system-view
2. Enter cellular interface view.
controller cellular interface-number
3. Specify the primary and backup profiles for the 3G modem.
profile main main-profile-number backup backup-profile-number
By default, profile 1 is used for 3G modem dialup.
Specifying the primary and backup profiles for a 4G modem
1. Enter system view.
system-view
2. Enter Eth-channel interface view.
interface eth-channel interface-number
3. Specify the primary and backup profiles for the 4G modem.
apn-profile apply profile-name [ backup profile-name ]
By default, no profiles are specified for 4G modem dialup.
Specifying the primary or secondary SIM card
About specifying the primary or secondary SIM card
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 3G/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.
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