From: Filyurin, Yan (yan.filyurin@eds.com)
Date: Tue Jun 19 2007 - 01:08:13 ART
Dod you have an example?
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Pat More
Sent: Monday, June 18, 2007 11:30 PM
To: ccielab@groupstudy.com
Subject: RE: Using route maps in EIGRP
You can use route-map for distribution-list in eigrp. Somehow Cisco
document is not perfect and lot of flaw. Newer IOS version behaves
differently.
The route-map in the distribution-list is able to match with
standard/extended acl, and prefix-list. You have to interprete the
extended-acl in the format of route/mask (like in bgp). It is all IOS,
not technology.
Ben <bmunyao@gmail.com> Sent by: nobody@groupstudy.com
06/19/2007 02:53 AM
Please respond toBen <bmunyao@gmail.com>
To
"Filyurin, Yan" <yan.filyurin@eds.com>
cc
"Tarun Pahuja" <pahujat@gmail.com>, ccielab@groupstudy.com
Subject
Re: Using route maps in EIGRP
That's sums it up.EIGRP distribute-list filtering options: Standard ACL,
Prefix-lists, in/outOSPF distribute-list filtering options: Standard
ACL, Prefix-lists,Route-maps, in onlyBenOn 6/18/07, Filyurin, Yan
<yan.filyurin@eds.com> wrote:Actually, at certain point and it was based
on real life experience, Ihad someone (I can't personally complete
verify it) attempt to do it usingextended ACL wildcards and it didn't
work. At that time the goal was topermit specific 10.0.0.0/8 routes,
but not 10/8 itself and what worked wasdoing a regular standard ACL
denying 10.0.0.0 0.0.0.0 and it worked.
Ihate to say it, but I don't remember all the details, but that seems in
linewith that is said here.
But to just to double check on my original question. Is it true
that:route maps in EIGRP are only used in redistribution and when it
comes toroute filtering, one can use ACLs and prefix-lists only with
prefix listshaving more granularity and easier to deal with.Thank you,
Ben and Tarun.Yan>
------------------------------> *From:* Tarun Pahuja
[mailto:pahujat@gmail.com]> *Sent:* Monday, June 18, 2007 2:07 PM> *To:*
Ben>
*Cc:* Filyurin, Yan; ccielab@groupstudy.com> *Subject:* Re: Using route
maps
in EIGRP>> Ben,> My comments were based on the following
document
and I was> referring to standard ACLs.>>
http://www.cisco.com/warp/public/103/eigrpfaq.shtml>> "The use of ACL
and distribute-list under EIGRP does not work in this> case. This is
because ACLs do not check the mask, they just check the> network
portion. Since the network portion is the same, when you allow>
172.16.1.0/24, you also allow 172.16.1.0/28.">> I usually use
Prefix-list for route filtering as it gives me more control.> I have
seen cases where extended ACLs are used to match subnet mask, but the>
logic is slightly different as you suggested. Destination portion
becomes> the subnet mask portion. You will find prefix list must easier
to implement> specially when dealing with VLSM addresses.>> HTH,>
Tarun>
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