From: navaid@rogers.com
Date: Mon Sep 01 2003 - 12:52:10 GMT-3
Thank you Brian.
>
> From: "Brian McGahan" <bmcgahan@internetworkexpert.com>
> Date: 2003/09/01 Mon AM 11:28:58 EDT
> To: "'Jonathan V Hays'" <jhays@jtan.com>,
> <navaid@rogers.com>,
> <ccielab@groupstudy.com>
> Subject: RE: EIGRP distance for certain routers.
>
> You can change the distance of EIGRP on a per prefix basis, but
> only for internal EIGRP routes.
>
> The distance syntax is as follows:
>
> Distance [distance] [source] [source_wildcard] [acl]
>
> Where [distance] = desired administrative distance
> [source] = originating router (from w.x.y.z in the sh ip route [prefix]
> output)
> [source_wildcard] = wildcard mask to match [source]
> [acl] = access-list that matches prefixes in question
>
> Take the following output:
>
> Rack1R2#sh ip route eigrp
> 220.20.1.0/26 is subnetted, 1 subnets
> D EX 220.20.1.64 [170/2560512256] via 144.1.32.3, 08:51:38,
> Serial0/0.32
> D 3.0.0.0/8 [90/2297856] via 144.1.32.3, 00:05:52, Serial0/0.32
> D 4.0.0.0/8 [90/2297856] via 144.1.32.3, 00:00:03, Serial0/0.32
> 144.1.0.0/24 is subnetted, 5 subnets
> D EX 144.1.23.0 [170/2560512256] via 144.1.32.3, 08:51:38,
> Serial0/0.32
> D EX 144.1.13.0 [170/2560512256] via 144.1.32.3, 08:51:38,
> Serial0/0.32
> D EX 144.1.15.0 [170/2560512256] via 144.1.32.3, 08:51:38,
> Serial0/0.32Rack1R2#sh ip route 3.0.0.0
> Routing entry for 3.0.0.0/8
> Known via "eigrp 6", distance 90, metric 2297856, type internal
> Redistributing via eigrp 6
> Last update from 144.1.32.3 on Serial0/0.32, 00:04:40 ago
> Routing Descriptor Blocks:
> * 144.1.32.3, from 144.1.32.3, 00:04:40 ago, via Serial0/0.32
> Route metric is 2297856, traffic share count is 1
> Total delay is 25000 microseconds, minimum bandwidth is 1544 Kbit
> Reliability 255/255, minimum MTU 1500 bytes
> Loading 1/255, Hops 1
>
> 3.0.0.0 is learned via EIGRP from the neighbor 144.1.32.3. The
> route is internal with a default AD of 90. Suppose we want to change
> the distance of this prefix to 100:
>
> Rack1R2#conf t
> Enter configuration commands, one per line. End with CNTL/Z.
> Rack1R2(config)#access-list 1 permit 3.0.0.0
> Rack1R2(config)#router eigrp 6
> Rack1R2(config-router)#distance 100 144.1.32.3 0.0.0.0 1
> Rack1R2(config-router)#end
> Rack1R2#clear ip route 3.0.0.0
> Rack1R2#sh ip route eigrp
> 220.20.1.0/26 is subnetted, 1 subnets
> D EX 220.20.1.64 [170/2560512256] via 144.1.32.3, 08:52:51,
> Serial0/0.32
> D 3.0.0.0/8 [100/2297856] via 144.1.32.3, 00:00:02, Serial0/0.32
> D 4.0.0.0/8 [90/2297856] via 144.1.32.3, 00:01:16, Serial0/0.32
> 144.1.0.0/24 is subnetted, 5 subnets
> D EX 144.1.23.0 [170/2560512256] via 144.1.32.3, 08:52:51,
> Serial0/0.32
> D EX 144.1.13.0 [170/2560512256] via 144.1.32.3, 08:52:51,
> Serial0/0.32
> D EX 144.1.15.0 [170/2560512256] via 144.1.32.3, 08:52:51,
> Serial0/0.32
>
> As you can see from the above output, the prefix 3.0.0.0/8 now
> has a distance of 100, and all other prefixes are left unaffected. Now
> let's try to change the distance of 220.20.1.64, an external EIGRP
> prefix, to 101.
>
> Rack1R2#conf t
> Enter configuration commands, one per line. End with CNTL/Z.
> Rack1R2(config)#access-list 2 permit 220.20.1.64
> Rack1R2(config)#router eigrp 6
> Rack1R2(config-router)#distance 101 0.0.0.0 255.255.255.255 2
> Rack1R2(config-router)#end
> Rack1R2#clear ip route 220.20.1.64
> Rack1R2#sh ip route eigrp
> 220.20.1.0/26 is subnetted, 1 subnets
> D EX 220.20.1.64 [170/2560512256] via 144.1.32.3, 00:00:01,
> Serial0/0.32
> D 3.0.0.0/8 [100/2297856] via 144.1.32.3, 00:00:47, Serial0/0.32
> D 4.0.0.0/8 [90/2297856] via 144.1.32.3, 00:00:47, Serial0/0.32
> 144.1.0.0/24 is subnetted, 5 subnets
> D EX 144.1.23.0 [170/2560512256] via 144.1.32.3, 00:00:47,
> Serial0/0.32
> D EX 144.1.13.0 [170/2560512256] via 144.1.32.3, 00:00:47,
> Serial0/0.32
> D EX 144.1.15.0 [170/2560512256] via 144.1.32.3, 00:00:47,
> Serial0/0.32
>
> As you can see from the above output, the prefix is not
> affected. The only protocol that you cannot change the distance on a
> per prefix basis is external EIGRP.
>
>
> HTH,
>
> Brian McGahan, CCIE #8593
> bmcgahan@internetworkexpert.com
>
> Internetwork Expert, Inc.
> http://www.InternetworkExpert.com
> Toll Free: 877-334-8987
> Direct: 708-362-1418 (Outside the US and Canada)
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Jonathan V Hays
> Sent: Saturday, August 30, 2003 3:13 PM
> To: navaid@rogers.com; ccielab@groupstudy.com
> Subject: RE: EIGRP distance for certain routers.
>
> Unfortunately there are number of generic IOS routing protocol commands
> that will appear to accept user input but not actually do anything.
> Under EIGRP the "distance" command is one of them.
>
> If you actually enter the command below to set the distance to 1 for
> EIGRP routes generated by 10.7.1.0/24 network routers, you will see that
> it does nothing. The AD will not change in your routing table.
>
> To make a change you will need "distance eigrp" which allows you to
> change the internal and external AD for all EIGRP routes, regardless of
> source.
>
> HTH,
>
> Jonathan
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> navaid@rogers.com
> Sent: Saturday, August 30, 2003 11:34 AM
> To: ccielab@groupstudy.com
> Subject: EIGRP distance for certain routers.
>
>
> Hi all,
>
> According to documentation CD:
> You cannot set the administrative distance in EIGRP against certain
> routes or sources, as you can with other protocols. The command does not
> work this way with EIGRP.
> http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/
> fiprrp_r/1rfeigrp.htm#1017590
>
> Then what is purpose of following command:
> R6(config-router)#distance ?
> <1-255> Administrative distance
> eigrp IP-EIGRP distance
>
> R6(config-router)#distance 1 ?
> A.B.C.D IP Source address
>
> R6(config-router)#distance 1 10.7.1.0 ?
> A.B.C.D Wildcard bits
>
> R6(config-router)#distance 1 10.7.1.0 0.0.0.255 ?
> <1-99> IP Standard access list number
> <1300-1999> IP Standard expanded access list number
> WORD Standard access-list name
> <cr>
>
> R6(config-router)#distance 1 10.7.1.0 0.0.0.255
>
>
> thanks,
>
> Naviad Shamsee
>
>
> >
> > From: "Georg Pauwen" <pauwen@hotmail.com>
> > Date: 2003/08/30 Sat AM 09:53:56 EDT
> > To: navaid@rogers.com, ccielab@groupstudy.com
> > Subject: Re: ospf area range
> >
> > Hello,
> >
> > can you post your configs ? I cannot reproduce the problem, I either
> get
> > only the /26 IA route (without area range) or I get only the /24 IA
> route
> > (with area range).
> >
> > Regards,
> >
> > Georg
> >
> >
> > >From: navaid@rogers.com
> > >Reply-To: navaid@rogers.com
> > >To: ccielab@groupstudy.com
> > >Subject: ospf area range
> > >Date: Fri, 29 Aug 2003 12:56:16 -0400
> > >
> > >Question: I am using area range command on R2 to summarize
> 172.29.12.0/26
> > >as 24-bit mask. Why I am seeing more specific route on R5 ?
> > >
> > >R1----(area 12)----R2----(area0)----R5
> > > 172.29.12.0/26 172.29.100.0/29
> > >
> > >On R2 using following command:
> > >area 12 range 172.29.12.0 255.255.255.0
> > >
> > >On R1 I am seeing following two routes:
> > >O IA 172.29.12.0/24 [110/20] via 172.29.12.2, 00:04:20,
> Ethernet0/0
> > >C 172.29.12.0/26 is directly connected, Ethernet0/0
> > >
> > >On R5 I am seeing following two routes:
> > >O IA 172.29.12.0/26 [110/84] via 172.29.100.2, 00:05:40, Serial0
> > >O IA 172.29.12.0/24 [110/74] via 172.29.100.2, 00:05:40, Serial0
> > >
> > >
> >
> >_______________________________________________________________________
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>
> 1
>
>
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