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CCNA 3 Labs and Study Guide - BINARYBB.INFO – @jagalbraith

CCNA 3 Labs and Study Guide - BINARYBB.INFO – @jagalbraith

CCNA 3 Labs and Study Guide - BINARYBB.INFO – @jagalbraith

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208 Switching Basics <strong>and</strong> Intermediate Routing <strong>CCNA</strong> 3 <strong>Labs</strong> <strong>and</strong> <strong>Study</strong> <strong>Guide</strong><br />

Step 2. Display the routing table on RTA.<br />

RTA#show ip route<br />

(output omitted)<br />

Gateway of last resort is not set<br />

172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks<br />

D 172.16.0.0/16 is a summary, 00:23:16, Null0<br />

C 172.16.0.0/18 is directly connected, FastEthernet0/0<br />

10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks<br />

D 10.0.0.0/8 is a summary, 00:23:20, Null0<br />

C 10.0.0.0/30 is directly connected, Serial0/1<br />

Step 3. Notice that RTA does not have routes to the simulated LANs on RTB <strong>and</strong> RTC. Enter the comm<strong>and</strong><br />

to disable automatic summarization on all three routers.<br />

Each router should have the no auto-summary comm<strong>and</strong> configured within the<br />

EIGRP routing process.<br />

Task 4: Configure Manual Summarization<br />

Step 1. Display the routing table on RTA.<br />

RTA#show ip route<br />

(output omitted)<br />

Gateway of last resort is not set<br />

172.16.0.0/16 is variably subnetted, 9 subnets, 3 masks<br />

D 172.16.160.0/19 [90/2297856] via 10.0.0.2, 00:00:16, Serial0/1<br />

D 172.16.128.0/19 [90/2297856] via 10.0.0.2, 00:00:16, Serial0/1<br />

D 172.16.224.0/19 [90/2297856] via 10.0.0.2, 00:00:16, Serial0/1<br />

D 172.16.192.0/19 [90/2297856] via 10.0.0.2, 00:00:16, Serial0/1<br />

C 172.16.0.0/18 is directly connected, FastEthernet0/0<br />

D 172.16.112.0/20 [90/2297856] via 10.0.0.9, 00:00:29, Serial0/0<br />

D 172.16.96.0/20 [90/2297856] via 10.0.0.9, 00:00:30, Serial0/0<br />

D 172.16.80.0/20 [90/2297856] via 10.0.0.9, 00:00:30, Serial0/0<br />

D 172.16.64.0/20 [90/2297856] via 10.0.0.9, 00:00:30, Serial0/0<br />

10.0.0.0/30 is subnetted, 3 subnets<br />

C 10.0.0.8 is directly connected, Serial0/0<br />

C 10.0.0.0 is directly connected, Serial0/1<br />

D 10.0.0.4 [90/21024000] via 10.0.0.9, 00:00:30, Serial0/0<br />

[90/21024000] via 10.0.0.2, 00:00:30, Serial0/1<br />

Step 2. Notice that RTA has 12 routes. Some of these routes can be summarized to reduce the size of<br />

the routing table.<br />

The simulated LANs on RTB share the same bit pattern for the first 21 bits of the network prefix<br />

172.16.128.0.<br />

The simulated LANS on RTC share the same bit pattern for the first 18 bits of the network prefix<br />

172.16.64.0.<br />

What comm<strong>and</strong> would you configure on both serial interfaces for RTB?<br />

RTB(config-if)#ip summary-address eigrp 100 172.16.128.0 255.255.128.0

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