code:

#!/bin/bash

switches=`cat /var/tmp/switches.txt`

for a in $switches
 do
        /usr/bin/expect << EOF
        spawn telnet $a
        expect "Username:"
        send "foo\r"
        expect "Password:"
        send "bar\r"
        expect "#"
        send "copy run tftp\r"
        expect "[]?"
        send "10.0.0.1\r"
        expect "confg]?"
        send "${a}-config\r"
        expect "#"
        send "exit\r"
EOF
done