From: Heiko Liedtke (heiko.liedtke@gmx.net)
Date: Mon Nov 13 2006 - 13:57:48 ART
hallo udo,
maybe you find this link usefull....
for me it was a real eye-opener for prefix-lists...
http://www.groupstudy.com/archives/ccielab/200310/msg01417.html
Viel Spass
Gruesse
heiko
Udo schrieb:
>Thanks Scott....
>
>but what about when I like to match 192.168.13-16.0/24 ?
>I think this is not possible to this with a one line prefix-list ?!
>
>
>Udo
>
>
>
>>Because your prefix list is set to allow /22 and /23 routes. If you are
>>receiving /24's, they won't match.
>>
>>Try:
>>
>>ip prefix-list RED_RIP_ROUTES seq 5 permit 192.168.8.0/21 ge 24 le 24
>>
>>See if that works better for you.
>>
>>
>>Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
>>#153, CISSP, et al.
>>CCSI/JNCI-M/JNCI-J
>>IPExpert VP - Curriculum Development
>>IPExpert Sr. Technical Instructor
>>smorris@ipexpert.com
>>http://www.ipexpert.com
>>
>>
>>
>>-----Original Message-----
>>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Udo
>>Sent: Sunday, November 12, 2006 12:45 PM
>>To: CCIE Groupstudy
>>Subject: Filter Routing updates with Prefix-List
>>
>>Hi all,
>>
>>I had the following test environment
>>R1---------R2--------R3
>>I would like to filter routing updates coming from R1 to R2
>>R1 and R2 are speaking RIP v2.On R1 are networks 192.168.10-20.0/24
>>
>>Is it possible to filter with a prefix-listthe networks
>>192.168.12-14.0/24 ? I configure :
>>
>>ip prefix-list RED_RIP_ROUTES seq 5 permit 192.168.8.0/21 ge 22 le 23
>>
>>But when I apply this to the distribute-list command all routes are
>>denied...
>>
>>Right now I'm not shure if I understand how prefix-list's are work
>>
>>Thx
>>
>>Udo
>>
>>
>>
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>
>
>
>
>
>
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