From: Ronnie Angello (ronnie.angello@gmail.com)
Date: Sun Dec 31 2006 - 13:17:00 ART
Administrative distance is locally significant. It is not advertised in
routing updates.
On 12/31/06, John C Edgmon <chris_edgmon@msn.com> wrote:
>
> They'll have an AD of 5 on router B, but advertised as 90 to A.
>
>
> >From: "Thiago Vazquez" <thiago.vazquez@uk.easynet.net>
> >Reply-To: "Thiago Vazquez" <thiago.vazquez@uk.easynet.net>
> >To: <ccielab@groupstudy.com>
> >Subject: EIGRP - Summary Routes' Administrative Distance
> >Date: Sun, 31 Dec 2006 05:15:45 -0000
> >
> >All,
> >
> >why sometimes EIGRP's summary routes show with AD of 5 and sometimes they
> >show as an internal routes with AD 90 ?
> >
> >See the following scenario:
> >
> >Router A has a single link to Router B.
> >The six addresses that Router B must advertise to Router A can be
> >summarized with two aggregate addresses. See Router B's config:
> >
> >interface Ethernet2
> >ip address 10.15.15.254 255.255.255.252
> >ip summary-address eigrp 15 172.0.0.0 255.0.0.0
> >ip summary-address eigrp 15 192.168.16.0 255.255.240.0
> >
> >See Router A's route table:
> >
> >Router A#show ip route
> >Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> >D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> >N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> >E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> >i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
> >* - candidate default, U - per-user static route, o - ODR
> >P - periodic downloaded static route
> >Gateway of last resort is not set
> >10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
> >C 10.10.1.0/24 is directly connected, Ethernet1
> >C 10.15.15.252/30 is directly connected, Ethernet0
> >D 172.0.0.0/8 [90/307200] via 10.15.15.254, 00:00:57, Ethernet0
> > <<<<
> >D 192.168.16.0/20 [90/2198016] via 10.15.15.254, 00:00:57, Ethernet0
> > <<<<
> >
> >Routes show with AD of 90.
> >
> >I've also Lab'ed with the summary routes being generated because the
> >auto-summary command and still see the AD as 90 but all documents I found
> >say that EIGRP's summary routes should have an AD of 5.
> >
> >Thanks, Thiago
> >
> >----------------------------------------------------------------------
> >Network Operations Center
> >Easynet
> >email: thiago.vazquez@uk.easynet.net
> >team email: networks.support@uk.easynet.net
> >tel.: +44 (0) 207 032 8006
> >----------------------------------------------------------------------
> >
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