config_if_err() {
  INTERFACE=$1
  echo "graph_order rcvd trans"
  echo "graph_title Interface $INTERFACE errors"
  echo "graph_args --base 1000"
  echo "graph_vlabel packets in (-) / out (+) per \${graph_period}"
  echo "graph_category network"
  echo "graph_info This graph shows the amount of errors on the $INTERFACE network interface."
  echo "rcvd.label packets"
  echo "rcvd.type COUNTER"
  echo "rcvd.graph no"
  echo "rcvd.warning 1"
  echo "trans.label packets"
  echo "trans.type COUNTER"
  echo "trans.negative rcvd"
  echo "trans.warning 1"
}
fetch_if_err() {
  INTERFACE=$1
  IINFO=$(grep "^ *$INTERFACE:" /proc/net/dev | cut -d ":" -f 2 | sed -e 's/  */ /g' -e 's/^[ \t]*//')
  echo "rcvd.value" "$(echo "$IINFO" | cut -d " " -f 3)"
  echo "trans.value" "$(echo "$IINFO" | cut -d " " -f 11)"
}