From: Ryan B (rbenigno@xxxxxxxx)
Date: Thu May 04 2000 - 13:03:09 GMT-3
Depends on the scenario you get I suppose. The lab may explicitly
tell you *not* to summarize, or maybe it'll tell you *not* to use
defaults in which case you need to summarize. Maybe you'll need to
use an ip default-network, or maybe you'll need to generate an ospf
default route for redistribution into RIP... Bottom line is you need
to know all ways to get something like this done.
But to summarize *out* of the OSPF domain, you would either use area
range (I don't like doing it this way because you lose your true
route) or you can redistribute connected *into* ospf and use a
summary-address. Doing it this way would give you a single extra
route that could then be redistributed out of your OSPF domain. But,
your OSPF domain stills has all the real routes to each of your
networks... (Oh, and make sure you put a route-map on your connected
redistribution so you only get the connected interfaces covered by the
summary-address).
Ryan, CCIE #5847
----- Original Message -----
From: Joe Martin
To: Nnanna Obuba ; wyan@ca.ibm.com ; ccielab@groupstudy.com
Sent: Thursday, May 04, 2000 7:05 AM
Subject: Re: OSPF Routing
That may be true, but from what I'm told for the CCIE lab is that NO
STATIC ROUTES. This includes routes to null and any system generated
routes.
JOE
----- Original Message -----
From: Nnanna Obuba
To: Joe Martin ; wyan@ca.ibm.com ; ccielab@groupstudy.com
Sent: Thursday, May 04, 2000 4:05 AM
Subject: Re: OSPF Routing
There is indeed a way for ospf to summarize out of the ospf domain...
use a summary-address, and it it gives an ospf originated address to
null 0 in your routing table...
Nnanna
----- Original Message -----
From: Joe Martin
To: wyan@ca.ibm.com ; ccielab@groupstudy.com
Sent: Thursday, May 04, 2000 1:05 AM
Subject: Re: OSPF Routing
According to Bruce Caslow (speaking to him in person), there isn't any
way for OSPF to summarize out of the OSPF domain. You may summarize
into OSPF at the ASBR(summary) or summarize out of an area at the
ABR(area range). The other way to get this IGRP network functioning
would be to specify an IP DEFAULT-NETWORK on the router that contains
both IGRP and OSPF. Make sure to specify a wholly unique major
network number that does not exist within the IGRP domain.
I know i've heard many people say that summary out of OSPF works, and
to admit it I haven't tested it. Please feel free to comment.
JOE
----- Original Message -----
From: wyan@ca.ibm.com
To: ccielab@groupstudy.com
Sent: Wednesday, May 03, 2000 8:53 PM
Subject: OSPF Routing
You need to summarize the 30-bit and 28-bit subnets to a 24-bit
subnet with
a
static route. Check the case study on P.730 of Doyle's Routing
TCP/IP. That
may help.
Weidong Yan
---------------------- Forwarded by Weidong Yan/Markham/IBM on
05/03/2000
11:47 PM ---------------------------
"Ben Rife" <brife@bignet.net> on 05/01/2000 04:31:24 PM
Please respond to "Ben Rife" <brife@bignet.net>
To: ccielab@groupstudy.com
cc:
Subject: OSPF Routing
Hey Gang!
Question:
I have a frame backbone running OSPF Area 0. Two of the spokes are
connected via ISDN as well. (Address spaces vary from /24, /30,
/28, etc
for 140.100.0.0 address.)
The hub router is also connected to an IGRP domain (/24 for
140.100.0.0).
The problem I am having is that I can't seem to get the ISDN link
140.100.5.0/30 advertised to the IGRP domain. The ISDN link is in
AREA 0. I
believe that if the link was in another area (ie 3), I could use
the well
known, area 3 range... cmd).
What do I do, since it is in Area 0 and is connected to the ASBR?
Any ideas?
Thanks,
Ben
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