1#!/bin/sh 2 3old_unit=$1 4new_unit=$2 5 6if [ $old_unit != -1 ]; then 7 ifconfig sl$old_unit delete down 8 if [ $new_unit == -1 ]; then 9 route delete default 10 fi 11fi 12 13if [ $new_unit != -1 ]; then 14 ifconfig sl$new_unit <address1> <address2> 15 if [ $old_unit == -1 ]; then 16 route add default <address2> 17 fi 18fi 19