Simple commands to convert MAC addresses to Cisco format and vice versa
The common mac addres format is colon separated: 01:23:45:67:89:ab Cisco format is dot separeted in three groups: 0123.4567.89ab To convert from one format to another create the following scripts: mactocisco echo $1 | sed 's!\:!!g;s!\(....\)!\1.!g;s!.$!!' | tr "[:upper:]" "[:lower:]" ciscotomac echo $1 | sed 's!\.!!g;s!\(..\)!\1:!g;s!:$!!' example: mymac:~ user$ ./ciscotomac 0123.4567.89ab 01:23:45:67:89:ab