(Optional) Configuring the SMS Alarm Function
After the short message service (SMS) alarm function is configured, a short message with the specified content can be sent to notify specific users of the service interface status change.
Context
The device can send SMS messages to users' mobile phones through SMS.
In the scenario of active/standby interface backup, when the active and standby links are switched, the active/standby interface status changes. Users can view the alarm on the device to know the interface status change. If users want to sense the interface status change anytime and anywhere, configure the SMS alarm function on the service interface. After the function is configured, the alarm with the interface status change is sent to users in a short message.
For example, a user connects to the Internet through an ADSL interface (active link) and a cellular interface (standby link). When the active link is faulty and services are switched to the standby link after the SMS alarm function is configured, a short message can be immediately sent to specific users. When the standby link is working properly and services are not switched back to the active link within the specified time, a short message can be sent to specific users again. If services are switched back to the active link within the specified time, no short message needs to be sent again.
Procedure
- Configure an SMS service pool.
An SMS service pool contains the preset SMS services, user phone numbers specified to receive SMS messages, and short message content.
- Configure the SMS alarm function.
Configure the SMS alarm function, specify the triggering condition for sending SMS messages, and invoke the preset SMS service in the SMS service pool to send specified SMS messages to specific users.
- Run sms send-item item-id track-interface { up | down } [ after time ]
The preset short message is sent to specific users when the LTE cellular interface status changes.
By default, the SMS alarm function is not configured on an interface.
If after time is not configured, a short message is sent immediately when the interface status changes. If after time is configured, a short message is sent only when the interface status changes and remains unchanged within the value of time. This configuration prevents the device from frequently sending SMS messages when frequent Up/Down status changes occur on an interface.
Before running this command, ensure that the SMS service with a specified ID is configured using the sms item command.
Currently, the SMS alarm function can be configured on interfaces only when cellular, ATM, and serial interfaces are used as the active and standby interfaces.
This command can be run on each interface at most four times, and the latest configuration does not override the previous ones.
- Run sms send-item item-id track-interface { up | down } [ after time ]
