From: Joseph Brunner (joe@affirmedsystems.com)
Date: Tue Apr 01 2008 - 23:06:19 ART
If you even try to access the backbone router's you will be charged under
the Computer Fraud and Abuse act of 1986. You agree to this by showing up in
the lab.
The proctor's are authorized to detain you until govt. officials arrive at
the lab, at which time you will be arrested.
Bottom line;
DON'T TRY IT
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Huan
Pham
Sent: Tuesday, April 01, 2008 9:37 PM
To: 'Cisco certification'
Subject: How to verify connectivity to Backbone routers
Hi GS
For internal reachability, it's can be done via ping test or automated
TCL/Macro scripts.
My question is how we verify connectivity to the backbone.
1 - Can we log on to the backbone and collect IP addresses?
If we can, then the same ping test approach can apply here.
2 - If we can not log on to BB routers, how we can collect backbone IP
address, and verify connectivity?
My approach is
2.1. On the routers closest to backbone, show routes advertised from
backbone. Here we can be quite confident that we have collected all the
routes BB advertise (if we have correct configuration on these router).
2.2. Best guess is to take the first available IP from each subnet, and do
ping test from the routers closest to backbone first.
2.3. If we get ping responses, then these are in fact valid IP addresses. We
then can roll out the ping tests to all routers in the lab.
2.4. If we do not get ping response, then the actual IP may be different.
There's no way to get valid IP addresses in use. We will then have to check
that backbone routes are received on each internal routers by show ip
routes, and we are advertising internal subnets to BB using (only need to
check on the routers peering with BB):
show ip bgp nei advertised,
show ip ospf database,
show ip eigrp topo
show ip rip database
Please let me know your thought.
Cheers,
Huan Pham
Network Engineer
p: +61 2 9722 3428
f: +61 2 9722 3410
e: huan.pham@valuenet.com.au
w: www.valuenet.com.au
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