From: Joseph D. Phillips (jphillips@ufcwdrugtrust.org)
Date: Wed May 26 2004 - 13:41:46 GMT-3
I am subscribed under the following two addresses, I believe:
josephdphillips@hotmail.com
jphillips@ufcwdrugtrust.org
Can I be unsubscribed from the second (this one)?
-----Original Message-----
From: Marvin Greenlee [mailto:marvingreenlee@yahoo.com]
Sent: Wednesday, May 26, 2004 09:35
To: David Hurtado
Cc: ccielab@groupstudy.com
Subject: Re: "discard-route" command
With a summary, the routing protocol adds a local
"discard-route". The route is a route to Null for the
summary. For example, if you were summarizing
172.16.1.0, 172.16.2.0, 172.16.3.0, and 172.16.0.0 to
172.16.0.0/22, a route to null would be created on the
local router for 172.16.0.0/22. As long as you have
one of the more specific routes in your routing table,
(.0, .1, .2, .3) the summary will be sent out. If you
lost the more specific route for the 172.16.3.0, but
still had the route for 172.16.2.0, the summary would
still be sent out. If traffic was destined for
172.16.3.0, the traffic would be sent to the router
summarizing. If the router summarizing does not have
a more specific route, the 'discard route' drops the
traffic. The "no discard route" allows you to prevent
this null route from being added, but has the negative
drawback of your router being stuck with traffic that
it doesn't know how to direct.
Marvin Greenlee, CCIE #12237
Network Learning, Inc.
marvin@ccbootcamp.com
--- David Hurtado <dei2viccie@hotmail.com> wrote:
> Hello everybody,
>
> I'm trying to understand the function of the
> command: "discard-route". I
> have read the command explantion on DocCD several
> times and i have looked
> for an example in cisco.com, but i have not found
> any didactic explanation.
>
> Would you mind to tell me where i can get a good
> example or explanation of
> the use of this command?
>
> Thanks a lot
>
>
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