From: CCIE yong (ccie_yong@xxxxxxxxxxx)
Date: Fri Aug 31 2001 - 09:19:12 GMT-3
This particular lab (fatkid 501) definitely can't be solved by the area 0
enage command because both the ASBR are area 0 connected, therefore the
effect of area 0 range won't reflect back to the backbone router.
therefore what fatkid solution is trying to use the summary-address (work
around) to do the trick.
yonger
>From: "Paul Crist" <pcrist@netsync.net>
>Reply-To: "Paul Crist" <pcrist@netsync.net>
>To: "CCIE yong" <ccie_yong@hotmail.com>, <ccielab@groupstudy.com>
>Subject: Re: summary-address
>Date: Fri, 31 Aug 2001 07:47:27 -0400
>
>My understanding of the summary address is that it should be used when
>redistributing other routing protocols into OSPF. The summary address
>command creates a route to null0, that is why you get the high metric. The
>correct way to do what you what is to do is to do an area range. Sometimes
>that does not work due to virtual links that you have running. My thought
>would be that if you are asked a question like that you need to configure
>the IOS as you would normally, if you have a problem ask the proctor if you
>can use an alternate configuration. Be aware of the problems your
>alternate
>configuration will cause; routes to null0, flapping routes, redistribution
>problems, etc. You may want to take a look at the initial problem -
>redistribution into FLSM protocol and see if there is a different approach
>you can use.
>
>Paul Crist
>----- Original Message -----
>From: "CCIE yong" <ccie_yong@hotmail.com>
>To: <ccielab@groupstudy.com>
>Sent: Friday, August 31, 2001 6:24 AM
>Subject: summary-address
>
>
> > Hi,
> >
> > I have question regarding the summary-address creation for the fatkid
>lab
> > 501 that make the /28 at area 0 to /24, so that the igrp router can get
>the
> > route.
> >
> > the question is, the creation of "summary-address" is it IOS version
> > specific, meaning that does it mean that some ios version can do the job
> > while some can't, because I tried to create the summary-address for area
>0
> > (/28) at r3 of fatkid lab 501, I CANNOT see the "170.10.7.0
>255.255.255.0
>is
> > a summary" in the routing table, and when I did
> >
> > r3#sh ip os s
> >
> > OSPF Process 1, Summary-address
> >
> > 170.10.7.0/255.255.255.0 Metric 16777215, Type 0, Tag 0
> >
> > seems like the metric is very big, actually I don't know what it means,
>and
> > just can't go to the routing table.
> >
> > please advise.
> >
> > Thanks in advance
> > Yonger
> >
> >
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