From: Skinner, Stephen (Stephen.Skinner@rbs.co.uk)
Date: Mon Oct 02 2006 - 06:15:40 ART
PS.
I just read my email and it wasn't very clear , so
Just to clarify ,
1. What is CISCO RECOMMENDED way of creating a Default route if you cant use
the summary address command
2.I can use static's in the lab - RE-DISTRIBUTION of a static
default.(NMC,IE,IPE don't use them in there workbook's , on the whole ,
so I will presume I cant use them on the lab)
3.no other default route is being generated or received by the router.
4.Other router that wants to receive the default is EIGRP STUB .
5. Default-information eigrp command only allows in a default , it wont
create it .
Many thanks
Stephen
> From: Skinner, Stephen
> Sent: 02 October 2006 10:06
> To: CCIE GroupStudy
> Subject: Creating a default route in eigrp.
>
>
> Hello,
>
> I have taken the following excerpt from the 12.4 guide's on the CCO.
>
> I have added my comments in .
>
>
> You should not use the ip summary-address eigrp summarization command to
> generate the default route (0.0.0.0) from an interface. (OK no problem)
>
> This causes the creation of an EIGRP summary default route to the null 0
> interface with an administrative distance of 5.(Yep , I have seen it
> happen)
>
> The low administrative distance of this default route can cause this route
> to displace default routes learned from other neighbours from the routing
> table.
> (i.e. other routing protocol's.)
> If the default route learned from the neighbours is displaced by the
> summary default route, or if the summary route is the only default route
> present, all traffic destined for the default route will not leave the
> router, instead, this traffic will be sent to the null 0 interface where
> it is dropped.
> (yep I get it )
>
> The recommended way to send only the default route out a given interface
> is to use a distribute-list command. You can configure this command to
> filter all outbound route advertisements sent out the interface with the
> exception of the default (0.0.0.0).
>
> OK . My question .
>
> With the summ-address command It actually creates the default as well as
> sending it out.
>
> So What is the preferred method of creating a Default route in eigrp ? .
> I cant use the "default-information" command as it only effect's if E will
> receive the default , not how to create it.
>
> If I cant use the summary-address how else can I create the default.?
>
> TIA
>
> Stephen Skinner
>
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