Special Router Configuration Options

Overview of Special Configuration Options

Special Options List

This chapter describes advanced configuration parameters that cannot be configured via the web GUI. These options must be set either via SSH or by editing a startup script, which can be configured through the GUI.

Item	Description
PPP_TOLERATE_NO_SIM	When set to 1, module restarts are disabled if connectivity is enabled but the SIM card is missing. After inserting the SIM card, the router must be rebooted manually.
PPP_TOLERATE_NO_SIM2	Same as above, but for the second cellular module (routers with two modules only).
PPP_TOLERATE_NO_SIGNAL	When set to 1, module restarts are disabled when the signal is lost. Note that SIM switching will not function in this mode.
PPP_TOLERATE_NO_SIGNAL2	Same as above, but for the second cellular module (routers with two modules only).

Summary of Special Router Configuration Options

How to Apply Special Options

To apply these special configuration options, you must directly edit the appropriate configuration file stored on the router. These files are located in the /etc directory and are named using the pattern settings.*. You need to locate the file that contains the desired parameter, which can usually be inferred from the parameter name. For example, a configuration parameter beginning with PPP_ will be found in the settings.ppp file. See the example script below.

Warning

On S1 routers, configuration files are integrity-protected and cannot be edited directly. Use the procedure in Changing System Configuration Programmatically on S1 Routers.

Configuration by a Script

The following example shows how to set a special option using a shell script. The script below sets PPP_TOLERATE_NO_SIGNAL to 1:

#!/bin/sh

# Parameters
CONFIG_FILE="/etc/settings.ppp"
PARAM_NAME="PPP_TOLERATE_NO_SIGNAL"
PARAM_VALUE="1"

# Check if the file exists
if [ ! -f "$CONFIG_FILE" ]; then
    echo "File $CONFIG_FILE does not exist!"
    exit 1
fi

# Check if the parameter exists in the file
if grep -q "^${PARAM_NAME}=" "$CONFIG_FILE"; then
    # Parameter exists, update its value
    sed -i "s/^${PARAM_NAME}=.*/${PARAM_NAME}=${PARAM_VALUE}/" "$CONFIG_FILE"
    echo "Updated $PARAM_NAME to $PARAM_VALUE"
else
    # Parameter doesn't exist, add it to the end of the file
    echo "${PARAM_NAME}=${PARAM_VALUE}" >> "$CONFIG_FILE"
    echo "Added $PARAM_NAME=$PARAM_VALUE to the file"
fi

# Verify the change
if grep -q "^${PARAM_NAME}=${PARAM_VALUE}$" "$CONFIG_FILE"; then
    echo "Verification successful: $PARAM_NAME is now set to $PARAM_VALUE"
else
    echo "Verification failed: $PARAM_NAME was not properly set to $PARAM_VALUE"
    exit 1
fi

After editing settings.ppp, restart the Mobile WAN service for the change to take effect:

/etc/init.d/mwanx restart

A router reboot is not required.