|
Home > Archive > CCNP > August 2003 > Summarizing within an Octet
You are viewing an archived Text-only version of the thread.
To view this thread in it's original format and/or if you want to reply to
this thread please [click here]
| Author |
Summarizing within an Octet
|
|
| JayDot 2003-08-06, 10:06 am |
| Ip addresses Summarization
Is there a Link or a Method to Summarize Routes....
172.16.1.64
172.16.1.80
172.16.1.96
172.16.1.112
Summarize too
172.16.1.64/26 WHY???
I understand the first 24 Bits Match + 2 More to Get to 64 = 26 Bits
172.16.1.64 (01 000000) /26
Summarize
172.16.1.192
172.16.1.208
172.16.1.192 (11 000000)/27
I got the first 24 But why 3 More Bits
to make it 27 rather then two more bits to make it 26 | |
| Townsend 2003-08-06, 5:11 pm |
| JayDot,
It is easier to understand if you look at these numbers in binary.
.64 is 01000000
.80 is 01010000
.96 is 01100000
.112 is 01110000
The first 2 places are what they have in common, that is why the summary address will have 2 added to the 24 to make 26.
In your second case
.192 is 11000000
.208 is 11010000
Here they have the first 3 places in common and therefor the 27.
I hope this helps.
Best of Luck! | |
|
|
|
|
|
