From: Quetta Walla (quetta_1@lycos.com)
Date: Sun Sep 18 2005 - 12:04:43 GMT-3
Are these routes EIGRP or OSPF routes?
Summary address in OSPF summerises only what is redistributed into ospf. So is is done on ASBR so the ospf area can see only that summary route for out side. To summarise aream use area x range x.x.x.x x.x.x.x
----- Original Message -----
From: "Anis Faruqui" <anisccie@gmail.com>
To: "Cisco certification" <ccielab@groupstudy.com>
Subject: Route Summarization options
Date: Sun, 18 Sep 2005 14:26:29 +0300
>
> Hi Group,
> Please forgive me for my english and drawing.:)
>
> Yesterday night I did one lab from Solie-I LAB-25 chapter 12 OSPF *OSPF
> Multiple Area Routing, Route Redistribution and
>
> SummarizationPart I,
>
> figure I am simulating it here ,
> OSPFAS-2001-A-0---R1-EIGRP AS-2001-R2---EIGRP-2001-int lo0
> 10.1.16.1/24<http://10.1.16.1/24>
> R2-int lo1 10.1.17.1/24 <http://10.1.17.1/24>
>
> R2-int lo2 10.1.18.1/24 <http://10.1.18.1/24>
>
> LAB Objective :-
>
> configure summary route to advertise all the 3 routes for the int
> lo0,lo1,lo2 as one route into OSPF or Aggregate as one route into OSPF
> Network from router R2 .
> *
>
> To achieve my Goal I have 2 Ways
>
> 1) To summarise these routes from router R2 by giving this command on the
> interface mode* IP summary-address eigrp 2001 10.1.16.0 <http://10.1.16.0>
> 255.255.255.252 <http://255.255.255.252> *and advertise it to R1 as summary
> route 10.1.16.0 <http://10.1.16.0> NM-255.255.252.0
>
> 2) To summarise the routes on R1 router in the router OSPF config mode by
> giving the command *summary-address 10.1.16.0 <http://10.1.16.0>
> 255.255.255.252 <http://255.255.255.252>
> *
>
> I chose the First option and configured the summary address on the interface
> connecting to router R1 everything went fine when I check the config of the
> LAB it was configured by option 2.
>
> So my question to my highly respectfull group member that if we get caught
> in such situation in real LAB that will be for sure which method should I
> select or we all will select.
>
> Regards,
>
> Anis
>
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