From: John W. Redmond (c-john.redmond@xxxxxxxx)
Date: Tue May 29 2001 - 18:12:07 GMT-3
Behalf Of Mike Hess,
Why not just be smart and realize that there are situations were a network
statement mask of 0.0.0.0 instead of 0.0.0.255 would be necessary...
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Mike Hess
Sent: Monday, May 28, 2001 20:06
To: ccielab@groupstudy.com
Subject: RE: how anal is the lab grading
Why not just be smart and use a network statement and the right wildcard
mask for every interface that you are putting into OSPF? It seems common
sense to me not to try and get too pretty or cut too many corners and then
get end up with a problem with 15 minutes left just because you were too
lazy to be more specific in the first place.
Some people advocate the use of too many shortcuts. I see a lot of people
advocating shortcuts such as this, using a whold slew of alias commands,
etc. Just learn the material and don't try to save seconds when it's the
minutes and hours that really matter.
Back to my original point, if you cannot at this point calculate a simple
wildcard mask then you are going for the wrong certification. Perhaps it is
not the grading.... :-)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Jeff K.
Sent: Monday, May 28, 2001 5:27 PM
To: Walter Chen; Peter Van Oene; ccielab@groupstudy.com
Subject: Re: how anal is the lab grading
You lost me on the second paragraph. Why would using the 0.0.0.0 wild-card
mask for interface area identification affect redistribution? This mask
just allows you to use the interface's address. Obviously the subnet mask
of your interfaces will affect redistribution, but I don't see how the
0.0.0.0 area mask will. You can definitely mess up your OSPF topology by
using the wrong mask (i.e., interfaces in the wrong area, interfaces added
to OSPF that weren't supposed to be). Let me know what your thoughts are on
this. Maybe I am forgetting something or am just misunderstanding
something.
Thanks,
-Jeff
----- Original Message -----
From: "Walter Chen" <wchen@iloka.com>
To: "Peter Van Oene" <pvo@usermail.com>; <ccielab@groupstudy.com>
Sent: Monday, May 28, 2001 3:04 PM
Subject: Re: how anal is the lab grading
> IMHO, you can use 0.0.0.255 mask if you have other 1.1.1.x/29 networks
onthe
> same router and they also belong to the same OSPF area. However, if these
> networks should not be in OSPF or in the same area, you definitely should
> not use 0.0.0.255 mask. The absolutely sure and correct way is to use
> 0.0.0.7 mask for 1.1.1.0/29 network.
>
> You can use 0.0.0.0 mask in cases if you do not need to redistribute
> 1.1.1.0/29 into other routing protocols on this same router. However, if,
> say, your 192.168.1.0/24 belongs to EIGRP and you want to reistribute
> between OSPF and EIGRP, the 1.1.1.0/29 network will NOT be passed into
EIGRP
> if you have used 0.0.0.0 mask.
>
> Walter
>
> ----- Original Message -----
> From: Peter Van Oene <pvo@usermail.com>
> To: <ccielab@groupstudy.com>
> Sent: Monday, May 28, 2001 9:35 AM
> Subject: Re: how anal is the lab grading
>
>
> > Personally, I'd not use 0.0.0.255 in any case, lab or otherwise. The
full
> 0's mask is the safe and accurate way to add interfaces to the OSPF
process
> and unless you need to add 20 odd interfaces, I'd suggest you use it. As
> far as the lab goes, I can attest that lab grading is fair. You shouldn't
> worry about trivial semantics. If your prepared, you'll likely have a
good
> idea when you are using an illegal shortcut.
> >
> > Pete
> >
> >
> > *********** REPLY SEPARATOR ***********
> >
> > On 5/28/2001 at 7:48 AM Don Dettmore wrote:
> >
> > >Question - How nit-picky are the graders of the lab? F0r example,
> > >something
> > >occurred to me when I was working in the lab:
> > >
> > >192.168.1.0 /24 ------ R1 ----- 1.1.1.0 /29
> > >
> > >When configuring R1 for OSPF, would the following be acceptable:
> > >
> > >network 1.1.1.0 0.0.0.255 area 0.0.0.0
> > >
> > >Or would that be considered wrong because of the 'wrong' (or I should
> say -
> > >not specific enough) wildcard mask.
> > >
> > >Just wondering how anal I must train myself to be.
> > >
> > >Don Dettmore
> > >**Please read:http://www.groupstudy.com/list/posting.html
> > **Please read:http://www.groupstudy.com/list/posting.html
> **Please read:http://www.groupstudy.com/list/posting.html
**Please read:http://www.groupstudy.com/list/posting.html
**Please read:http://www.groupstudy.com/list/posting.html
**Please read:http://www.groupstudy.com/list/posting.html
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