Learning by Doing: CISCO Certified Network ... - SCN Research

11. Take the main line down (just unplug one end of the serial cable) and ping and
trace the route again. Remember RIP may take a few seconds to “catch” up.
Your traffic should now be re-routed across the back up line.
12. Bring the main line back up and re-ping and re-trace the route. Unless you used
the “permanent” suffix to the ip route command the back up line should still be
the preferred line. But…you know how to fix that too.
Supplemental Labs or Challenge Activities:
1. Set a whole network with 4-5 routers with routes that are summarized and use
static lines to enable “routing.” Now you can see why we don’t always prefer
using them.
2. Find out what the other administrative distances are for the other routing
protocols. Hint: look on CISCO’s website.
So What Have I Learned Here?
In this lab you learned that, while useful, static routes can become a pain in the admin. It
is best to do dynamic routing only when absolutely necessary. Later, as you progress in
your studies you will better learn when and where to use static routes. But for now just
forget about them.
Guest Router Name Derivation
Phiber Optik was the leader of the Master’s of Deception (MoD) hackers ring in New
York City in the 1980’s/early 1990’s. Allegedly he master-minded the Martin Luther
King day crash of AT&T’s national phone service in 1990. Known for his daring actions
and media stunts he appeared or was interviewed in many publications including
Harper’s, Esquire, and the New York Times. Don’t worry…he got busted. Turk 182!
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