From: Les Hardin (hardinl@xxxxxxx)
Date: Mon Jan 22 2001 - 01:42:27 GMT-3
Peter,
28 comes from the common bits in the three patterns below. the value of
the bit pattern 00011100 is 16+8+4 = 28.
HTH,
Les
At 04:29 AM 1/22/2001 +0000, peter brown wrote:
>I have always been confused about summarization. The part that confuses me
>is not how you get the mask but how you change the bits in the octet
>
>For example Caslow in page 306
>
>Summarize 172.16.29.0, 172.16.30.0, 172.16.31,0
>
> 128 64 32 16 8 4 2 1
>29 0 0 0 1 1 1 0 1
>30 0 0 0 1 1 1 1 0
>31 0 0 0 1 1 1 1 1
>
>he then said the summary is 172.16.28.0 255.255.252.0
>My question is how did he get 28 in the third octet.
>
>Please help.
>
>
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