hi, I have a problem with my router or IOS version? because when I trying to configure IGRP on my 2620 router say: r1(config)#router igrp 101 ^ % Invalid input detected at '^' marker.
I have only something like this: iso-igrp
my IOS ver: c2600-entbasek9-mz.124-3.bin
where I'm wrong? - please help me. thanks