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

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should not be able to ping. This is because Phiber has no way to direct traffic,<br />

even though we did it on Optik. We must add another static route from Phiber to<br />

Optik to allow workstation A to be able to ping workstation B. Go ahead and add<br />

the route. (Can’t tell you everything step-<strong>by</strong>-step, otherwise you wouldn’t learn<br />

much…ok…if you get stuck you can check the answers.)<br />

7. Static routes are really good for troubleshooting. Later on when you learn about<br />

setting up routers with multiple routes to a destination you will learn to use static<br />

source<br />

router<br />

destination<br />

router<br />

routes to “force” communication over one path in particular to test that specific<br />

path. Suppose the route given <strong>by</strong> the “<br />

“ in the picture above was<br />

chosen <strong>by</strong> the source router to be the “best path” to the destination router. But we<br />

wanted to test the capabilities of a “lesser path” (given as “<br />

“) to the<br />

destination router. We could force the route with a static route.<br />

8. We can actually specify the interface, rather than using the IP address for setting<br />

up a static route (told you we’d come back to it!). So instead of this:<br />

optik(config)#ip route 192.168.1.0 255.255.255.0 179.40.6.1<br />

For the same thing we could use this:<br />

optik(config)#ip route 192.168.1.0 255.255.255.0 serial0/0<br />

If you forget your options then use your help command:<br />

optik(config)#ip route 192.168.1.0 255.255.255.0 ?<br />

A.B.C.D Forwarding router's address<br />

FastEthernet FastEthernet IEEE 802.3<br />

Loopback Loopback interface<br />

Null Null interface<br />

Serial Serial<br />

232

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