From: Nick Ortez (jnkmail4eva@yahoo.com)
Date: Sun Oct 23 2005 - 15:03:22 GMT-3
Thanks, your explanation has helped me understand
acl's and prefix list much better.
I am going to play around with extended acl's in my
lab
and see what I can come up with.
--- Henk de Tombe <henk.de.tombe@qi.nl> wrote:
> Hi,
>
> You can summarize to 10.1.4.0 & 10.1.5.0 in a single
> standard ACL entry. The
> standard ACL in this example will match everything
> between /23 and /32. See
> the output below, this implementation can lead to
> routes being marked with a
> weigth of 10 which have a other mask length.
>
> A prefix list or a special extended ACL will force
> /24 mask to be marked
> with a weight of 10.
>
>
>
>
> RTR02#sh ip bgp
> BGP table version is 6, local router ID is 150.1.2.2
> Status codes: s suppressed, d damped, h history, *
> valid, > best, i -
> internal,
> r RIB-failure, S Stale
> Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric
> LocPrf Weight Path
> *> 10.1.4.0/25 150.1.7.7 0
> 10 64517 i
> *> 10.1.4.128/25 150.1.7.7 0
> 10 64517 i
> *> 10.1.5.0/24 150.1.7.7 0
> 10 64517 i
> RTR02#sh route-map
> route-map test, permit, sequence 10
> Match clauses:
> ip address (access-lists): 1
> Set clauses:
> weight 10
> Policy routing matches: 0 packets, 0 bytes
> RTR02#sh access-list
> Standard IP access list 1
> 10 permit 10.1.4.0, wildcard bits 0.0.1.255 (4
> matches)
>
>
> Regards,
> Henk
>
>
> -----Oorspronkelijk bericht-----
> Van: nobody@groupstudy.com
> [mailto:nobody@groupstudy.com] Namens
> jnkmail4eva@yahoo.com
> Verzonden: zaterdag 22 oktober 2005 21:09
> Aan: ccielab@groupstudy.com
> Onderwerp: Summarization confusion ..
>
> I have 2 neworks and i want to summarize them ..
>
> 10.1.4.0 /24
> 10.1.5.0 /24
>
>
> 10 . 1. 0000 010 | 0. 0000 0000
> 10 . 1. 0000 010 | 1. 0000 0000
> -------------------|--------------
> 255. 255. 254 | 0
>
> I can summarize it 10.1.4.0/22
>
>
> I would like to use it in an acl for setting metric
> for those 2 routes ..
>
> access-list 1 permit ip 10.1.4.0 0.0.1.255 any Is
> the wildcard mask correct
> in acl 1 for those 2 routes ?
>
> route-map test permit 10
> match ip address 1
> set weight 10
>
>
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