what is the exact meaning for prefix-list..

[syjeon]

Hi, anyone whom see this article.

Can you explain to me what is the meaning for below prefix-list?

ip prefix-list mgmt seq 5 permit 10.1.1.0/24 le 32

if we doesn't state 'ge xx', and then it would be considered as 'ge 0', correct?. if so, above sentence is meaning 10.0.0.0 ~ 10.255.255.255?

[Edwin Summers]

Match any subnet starting with 10.1.1.0 (/24 - all 24 bits must match) and with a prefix length of /32 or less.  Meaning any network from the /24 of 10.1.1.0 and any subnet of that network down to host routes (/32).

I don't believe your second statement is correct.  The least specific it can be is /24 since that is the original "match".

Hope this helps,

Ed

[blau grana]

Hi Syjeon

Here is nice explanation of logic behind prefix list

picture:

http://zhous.net/groups/basicnetworking/wiki/66fb2/images/__thumbs__/804eb.png

article:

http://zhous.net/groups/basicnetworking/wiki/66fb2/Route_Filtering.html

[Peter Paluch]

Hello,

In addition to friends' answers here, I've tried to explain prefix lists in depth here:

https://supportforums.cisco.com/message/3568328#3568328

Perhaps it helps.

Best regards,

Peter