Cisco Mac Question

When I do a snmpwalk of my router the mac address are not what I expected.

Then return looking like this

How would you convert them to 001c.c92a.b677 when a shell script?

Awful long but works:

echo "0:1c:c9:2a:b6:77"| tr -s ':' '\n'|  sed 's/^.$/0&/'| tr -d '\n'| sed 's/\(....\)\(....\)\(....\)/\1\.\2\.\3\n/g'
001c.c92a.b677

Here is a pure shell solution using ksh93

#!/usr/bin/ksh93

MAC="0:1c:c9:2a:b6:77"

IFS=":" typeset -a array=($MAC)

outmac=""
for ((i = 0; i < 6; i++))
do
   (( ${#array} < 2 )) && outmac="${outmac}0"
   outmac="${outmac}${array}"
   (( i < 5 && (i % 2) == 1 )) && outmac="${outmac}."
done

echo "$MAC --> $outmac"

which gives the following output

0:1c:c9:2a:b6:77 --> 001c.c92a.b677

Thanks for the responses.

I am on Solaris 10. This does not seem to work?

tr -d '\n'

??