From: Guyler, Rik (rguyler@shp-dayton.org)
Date: Thu Jan 04 2007 - 12:05:10 ART
Really, reading every little detail and "seeing" all the various
interpretations will only make you better in the lab. I typically use the
exact same address/mask in my OSPF processes as I do on the interface, which
also exactly matches only the interface intended so you can do this either
way. I think you'll find that the consensus is divided on this topic. I
believe I've seen Brian Dennis do it my way and yet Brian McGahan use the
host address so if these two can agree to disagree, I guess we can too.
Either way, there aren't really any technical differences, just some lab
author's way of making you think just a little more. ;-)
Rik
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Frank
Sent: Thursday, January 04, 2007 9:21 AM
To: alexeim@orcsoftware.com; ccielab@groupstudy.com
Subject: Re: ospf wildcard bits
Alexei Monastyrnyi schrieb:
OK, thank you. I just was confused about "exactly match", that brought me to
the idea, to match it more close also to the netmask, because i have not
seen this kind of wording.
Normaly i would also configure it with the 0.0.0.0 mask. In ospfv3 it's
already only an interface definition.
What i found is, that i will be sometimes confused about the wording in the
questions. Thinking it might be that there is something hidden i don't
expect. People have so must written about reading each task very carefully,
that maybe i'm now sometimes a little bit picky. That's not bad. Just takes
some time if you think to much on how to do it. That might be a problem
than.
Thanks also for the other answers.
Frank
> Hi.
> I would go for the first one if it is asked for exact match.
> Those two are quite the same in this case, but should you go for /25
> etc mask on interface, that might become critical. I think 0.0.0.0
> wildcard is the best practice until said otherwise.
>
> HTH
> A.
>
> on 1/4/2007 1:52 PM Frank wrote:
>> Hi,
>>
>> what does it mean if i have configure ospf network statements to
>> "match the interface exaclty"?
>>
>> interface s0/0
>> ip add 150.1.1.1 255.255.255.0
>>
>> router ospf 1
>> netwo 150.1.1.1 0.0.0.0
>>
>> or
>>
>> router ospf 1
>> netwo 150.1.1.1 0.0.0.255
>>
>> The first configuration does match the ip address exactly and the
>> second does match the netmask directly.
>> What should you choose. I know both are valid, but what would be the
>> right one regarding to "exaclty match the interface"?
>>
>>
>> Frank
>>
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