(10.0.0.0/8 ge 24 le 30) VS (10.0.0.0/24 le 30)

[mohammed hashim]

hi,

when creating ip prefix-list, are these sets are same or different ?

Ip prefix-list TEST permit 10.0.0.0/8 ge 24 le 30

VS

Ip prefix-list TEST permit 10.0.0.0/24 le 30

??

[paul driver]

Hello
My understanding is:

Ip prefix-list TEST permit 10.0.0.0/8 ge 24 le 30 <-allows any subnets in 10.x.x.x greater than 24 and less /equal than 30
10.0.0.X
10.1.0.X
10.2.0.X
etc..

Ip prefix-list TEST permit 10.0.0.0/24 le 30 <-allows subnets in 10.0.0.x greater than 24 and less /equal than 30
10.0.0.X

res
Paul

[mohammed hashim]

Hi Paul,

10.0.0.X
10.1.0.X
10.2.0.X

but this will break the rule of /8

[paul driver · Accepted solution]

Hello

Mohammed, Not sure what you are saying by breaking rule /8

I see it has the following:

10.0.0./8 range from 10.0.0.0 - 10.255.255.254

Ip prefix-list TEST permit 10.0.0.0/8 ge 24 le 30 - This is saying any subnet from that  /8 with prefix greater than 24 and less/equal 30 will be accepted

10.0.0.1/24
10.1.10.X/25
10.2.2.0/26
etc

10.0.0.0 /24 range from 10.0.0.1 -255

Ip prefix-list TEST permit 10.0.0.0/24 le 30 - This is saying any subnet from that  /24 with prefix greater than 24 and less/equal 30 will be accepted

10.0.0.0/24 - 10.0.0.1 -254
10.0.0.0/25 - 10.0.0.1 -128
10.0.0.128/25 - 10.0.0.128 -254

I am sure others will comment and clarify if I am misinterpreting it incorrectly. 

res

Paul

[mohammed hashim]

thanks a lot paul, it is clear,