From: DAN DORTON (DHSTS68@xxxxxxxxxxxxxxx)
Date: Thu Dec 13 2001 - 15:05:28 GMT-3
I know the circumstances. When you use the default network it will not
create a static if the route is in the table & is withen the classfull
boundry of the address being used. The problem that I have been having
is that the router used (IGRP) is using a class B network subnetted to a
/28 on its connecting IGRP interface. In this particular situation the
only routes it will accept are /28's. My problem is that in the rest of
the network there are also /30's withen this same class B network. Here
I need to use the ip default network in order to make the IGRP router
use the /28 route to get to the /30's. Once it gets to the next router
which is an OSPF ASBR that router will then forward the packet on to the
proper segment.
I have been trying to somehow summarize the /30 networks in OSPF to a
/28 so that when it redistributes into IGRP the other IGRP router will
recognize the routes, but I have not been able to accomplish this yet.
I thought by putting a secondary address on the interface with a /30
mask that it would then accept the /30 routes as well, but this is not
working either.
I think maybe I have been looking at this too long, or something.
Any ideas?
>>> "Larson, Chris (Contractor)" <Chris.Larson@ed.gov> 12/13/01 10:41AM
>>>
I have seen this as well however IP Default-network does not always
inject a
static route. I forget the exact circumstance that it will not
configure a
static route and you can look on CCO. I believe that if the router
already
has a route to the network you use in the statement it will not
generate a
static. If it doesn't have it in it's routing table then you can
advertise a
classfull loopback from another router and distribute into the
protocol.
Then configure the default-network on the router using that loopbsck as
the
default network.
-----Original Message-----
From: DAN DORTON [mailto:DHSTS68@dhs.state.il.us]
Sent: Thursday, December 13, 2001 10:36 AM
To: ccielab@groupstudy.com
Subject: Opinions on static routes defined.
In some of my practice labs I have of course seen the phrase do not
use
any statics to accomplish goals in this lab unless specifically
specified to do so.
In some of these instances the only way to make some of it work is to
either use the IP DEFAULT-NETWORK command ( Which of course creates a
static route, or use the DEFAULT-INFORMATION ORIGINATE ( Which is also
sort of a static injected type route.).
In my mind these commands both fall in the category of statics, but
then in some instance I see no other way. ( Also some of the instances
could be fixed with protocol redistribution, but this is explicitly
denied as well. )
I am just curious about how everyone else feels on this subject.
Please no breaking the NDA as this is not my intent of the question. I
am only wanting personal feeling responses.
Thanks,
Dan
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