Bash script that extract the router speed.

#!/bin/bash

# Broadband Speed within limits Download 14000 and Upload 750

ROUTER=<router_ip>
USER=<router_username>
PASS=<router_password>
# Download Link speed
DL=14000
# Upload Link speed
UL=750

SPEED=($(wget -qO- http://$ROUTER/sky_router_status.html --user=$USER --password=$PASS | awk -F "'" '$0 ~ /Modemstat\[0\]/  {print $2, $4}'))

if [[ ${SPEED[0]} -lt $DL || ${SPEED[1]} -lt $UL ]] ; then
  exit 2
else
  echo "Broadband Speed within limits Download ${SPEED[0]} and Upload ${SPEED[1]}"
  exit 0
fi

This can be integrated in Nagios to send an alert if the speed drops.