Greetings all
For those of you who have the BSCN Cisco press book, you can refer to pages
95 for this question.
A router has the following ip's in its routing table:
172.16.1.00110000 [48] /28
172.16.1.10000000 [128] /28
172.16.1.10010000 [144] /28
172.16.1.10100000 [160] /28
172.16.1.10110000 [176] /28
Now, the exercise was to determine how these ip's should be summarized.
This is how I did it:
172.16.1.48 /28
172.16.1.128 /27 [ for ip's 172.16.1.128 and 172.16.1.144 ]
172.16.1.160 /27 [ for ip's 172.16.1.160 and 172.16.1.176 ]
The BSCN from CiscoPress shows it this way however:
172.16.1.48 /28
172.16.1.128 /26 [ all other ip's ]
Why would this be the best way of summarizing the routes. I know my way
adds a extra entry into the routing table, but on the example before (page
94) Cisco summarized all the ips [ 6 total ] with 2 summarys instead of 1.
Am I missing a point to watch for when summarizing?
Thanx
Dyland
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