Then given situation is to reduce the
routing table size and memory. We can achieve this by summarization. Now lets
summarize the BB2 all loopback address.
BB2#sh ip interface brief
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 155.1.42.2 YES NVRAM
up up
Loopback0 222.1.1.1 YES NVRAM up
up
Loopback1 222.1.2.1 YES NVRAM up
up
Loopback2 222.1.3.1 YES NVRAM up
up
Loopback3 222.1.4.1 YES NVRAM up
up
Loopback4 222.1.5.1 YES NVRAM up
up
R6#sh ip route
D
222.1.3.0/24 [90/2302976] via 155.1.156.1, 00:00:11, FastEthernet0/0
D
222.1.2.0/24 [90/2302976] via 155.1.156.1, 00:00:11, FastEthernet0/0
D
222.1.1.0/24 [90/2302976] via 155.1.156.1, 00:00:11, FastEthernet0/0
D
222.1.5.0/24 [90/2302976] via 155.1.156.1, 00:00:11, FastEthernet0/0
D
222.1.4.0/24 [90/2302976] via 155.1.156.1, 00:00:11, FastEthernet0/0
By seeing the ip address we can easily tell
that it’s a block of 8.Hence the summary address will be 222.1.0.0
255.255.248.0.
Lets configure this summarization address
to BB2
BB2#sh run int fa0/0
interface FastEthernet0/0
ip address
155.1.42.2 255.255.255.0
ip
summary-address eigrp 100 222.1.0.0 255.255.248.0 5
duplex auto
speed auto
end
R6#sh ip route | in 222.1.0.0/21
D
222.1.0.0/21 [90/2302976] via 155.1.156.1, 00:03:30, FastEthernet0/0
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