IP Summary method of routing Technology (list method)

The concept is always abstract, easy to use method to win efficiency! On the IP summary , here is a simple example: (one can understand!!!) ）

Example 1:

Summarize the following IP:

(1) 78.1.1.1/8 (2) 79.1.1.1/8 (3) 80.1.1.1/8 (4) 81.1.1.1/8 (5) 82.1.1.1/8

Tip: See so many IPs, don't panic! Just remember to summarize the IP, use the list to ———————— the following

8 4 2 1 0000 0001 0000 0001 0000 0001

(1) 0 1 0 0 1 1 1 1 (=78) 1 1 1

(2) 0 1 0 0 1 1 1 1 (=79) 1 1 1

(3) 0 1 0 1 0 0 0 0 (=80) 1 1 1

(4) 0 1 0 1 0 0 1 0 (=81) 1 1 1

(5) 0 1 0 1 0 0 1 0 (=82) 1 1 1

0 1 0 0 0 0 0 0 0 0 0

The first 3 bits are the same

The same has 3 bits, where 1 specifies 64, copy, followed by 0, so its aggregated IP is: 64.0.0.0/3 224.0.0.0

The origin of 224? ———— because it is 3 bits the same, so 128+64+32=224

Think: If the first 3 bits are 1 1 1 instead of 0 1 0 o'clock, what is the aggregated IP???

This article from "No Drag Mud Tony" blog, reprint please contact the author!

IP Summary method of routing Technology (list method)