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

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7. Try to ping the loopback. You should not be able to see it. It should not have<br />

shown up in the ip routing table either. The ISDN line comes up, stays active,<br />

and then shuts off pretty quickly. It’s actually faster than the routing protocol<br />

(I used EIGRP). In order to make this work we need to set up some static<br />

routes between the two.<br />

wilson (config)#ip route 192.168.140.0 255.255.255.0 192.168.1.4<br />

This route basically is saying. “in order to get to the 192.168.140.0/24<br />

network use the 192.168.1.4 interface.”<br />

tang(config)#ip route 192.168.130.0 255.255.255.0 192.168.1.3<br />

This route basically is saying, “in order to get to the 192.168.130.0/24<br />

network use the 192.168.1.3 interface.” You should be able to ping and see<br />

all networks between wilson and tang.<br />

8. Now we need to get those ISDN routers talking to each other. We must<br />

enable multilinking on the BRI interfaces with PPP. This will allow us to use<br />

the other B-channel for communicating.<br />

geoffrey(config-if)#dialer map ip 192.168.1.3 name wilson 5557000<br />

geoffrey(config-if)#dialer map ip 192.168.1.4 name tang 5558000<br />

geoffrey(config-if)#ppp multilink<br />

geoffrey(config)#username wilson password cisco<br />

geoffrey(config)#username tang password cisco<br />

geoffrey(config)#ip host wilson 192.168.1.3<br />

geoffrey(config)#ip host tang 192.168.1.4<br />

geoffrey(config)#ip route 192.168.300.0 255.255.255.0 192.168.1.3<br />

geoffrey(config)#ip route 192.168.400.0 255.255.255.0 192.168.1.4<br />

osowski(config-if)# dialer map ip 192.168.1.3 name wilson 5557000<br />

osowski(config-if)#dialer map ip 192.168.1.4 name tang 5558000<br />

osowski(config-if)#ppp multilink<br />

osowski(config)# username wilson password cisco<br />

osowski(config)#username tang password cisco<br />

osowski (config)# ip host wilson 192.168.1.3<br />

osowski(config)#ip host tang 192.168.1.4<br />

osowski(config)#ip route 192.168.300.0 255.255.255.0 192.168.1.3<br />

osowski(config)#ip route 192.168.400.0 255.255.255.0 192.168.1.4<br />

wilson(config-if)#dialer map ip 192.168.1.1 name geoffrey 5551234<br />

wilson(config-if)#dialer map ip 192.168.1.2 name osowski 5554000<br />

wilson(config-if)#ppp multilink<br />

wilson(config)#username geoffrey password cisco<br />

wilson(config)#username osowski password cisco<br />

wilson(config)#ip host geoffrey 192.168.1.1<br />

449

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