PREFIX LIST

[raghavendran.r]

Hi NEtwork Enginers ,

Kindly help me .. if i change the sequence number ..will it trouble ?

ip prefix-list migrate seq 52 permit 10.206.233.0/24
ip prefix-list migrate seq 53 permit 10.206.233.0/25

mean below will trouble ?

ip prefix-list migrate seq 52 permit 10.206.233.0/25

ip prefix-list migrate seq 53 permit 10.206.233.0/24

I want to understand while configuring prefix list do we need worry about sequence number and where our statement.

[chrihussey · Accepted solution]

I don't think the order makes much of a difference. Although one is a subset of the other a match is a match. So if if the /25 has to pass, the permit 10.206.233.0/24 is not a match and it would have to go to the next. Similarly, if the /24 had to pass, the permit 10.206.233.0/25 wouldn't fit the bill.

However if you had "permit 10.206.233.0/24 ge 24 le 25" it should allow the /24 and /25, yet it would also allow 10.206.233.128 /25.

The list is processed sequentially until there is a match, if no match, then the implicit deny all applies.

Hope this helps.

[raghavendran.r · Accepted solution]

Hi Chri

[raghavendran.r]

Hi Chri ,

Thank you very much...for your detailed explanation