CCNA practical exam

michaelblackspirit

Hello,

I just failed my practical exam, but I get a resit on Wednesday.
Now I dont really know where I went wrong, but I think its something to do will classless stuff.

I subnetted 166.6.0.0/21, and I needed to split the address into 2 for each host network. So one host network gets bottom half and one host network gets top half.

Now, my e0 ip was 166.6.247.254, and one of my hosts was 166.6.16.1, and the other 166.6.240.1

I used igrp, and put in the network statements 166.6.240.0 and 166.6.16.0.

The second host "166.6.240.1" worked, but the first didn't, no pings, and in the output of show ip route, only 166.6.240.0 was showing up, under 166.6.0.0.

Now, should I have only put in one network statement : 166.6.0.0? And do I need to use the ip classless command? I was using a 1700 series router.

Thanks guys,

Michael.

michaelblackspirit

Just been playing around with some simulators, packet tracer 3 :S

I believe the ip classless command was the thing that stuffed me. As the cisco book said that if you have classless enabled, it will route a subnetted packet to its closest supernet.
So that means a subnetted 166.6.16.0 would go to the 166.6.0.0 supernet, so that means out the 166.6.247.254 interface.

Anybody know what the logging synchronus command does? I haven't seen it in the cisco book.