From: Scott Morris (swm@emanon.com)
Date: Mon Nov 14 2005 - 22:50:34 GMT-3
If they give it to you as a requirement not starting out with "On R5...."
then I'd agree with Brian that it makes sense to do it everywhere so that
you can predict the decisions a router will make anyplace in your topology.
That may take all the fun out of it, but in the lab, I highly recommend
predictable results! :)
Scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Tim
Sent: Monday, November 14, 2005 6:52 PM
To: 'Brian McGahan'; 'Jason Edelman (jaedelma)'; ccielab@groupstudy.com
Subject: RE: 2 Questions
Hey Brian,
Of course, technically speaking you're right but I was coming from the point
of view of the ccie lab.
If this came up in the lab and the command wasn't configured on all routers,
I'm pretty sure that would cause a loss of points. Do you agree?
-----Original Message-----
From: Brian McGahan [mailto:bmcgahan@internetworkexpert.com]
Sent: Monday, November 14, 2005 6:44 PM
To: Tim; Jason Edelman (jaedelma); ccielab@groupstudy.com
Subject: RE: 2 Questions
> What you DO have to remember re: using this command is that if you use
it
> on
> one ospf router, you must use it on all ospf routers in the domain (or
> maybe in the area, I'm not 100% sure). Better double check that.
Auto-cost is not exchanged during adjacency establishment. This
means the value is locally significant and does not need to be consistent
between devices. Do you want to keep it consistent in your network design?
Probably. Do you need to? No.
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
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> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Tim
> Sent: Monday, November 14, 2005 5:33 PM
> To: 'Jason Edelman (jaedelma)'; ccielab@groupstudy.com
> Subject: RE: 2 Questions
>
> Jason,
>
> I once tried to memorize the auto-ref-bw formula but keep forgetting
it
> after a couple of weeks. Then I realized doing that was wasting too
many
> mental cpu cycles since that formula is right at the beginning of the
ospf
> command reference.
>
> So, you're probably better off just checking the Doc-CD and that way
> you're not risking someone on GS telling you the wrong thing (by
> mistake).
>
> What you DO have to remember re: using this command is that if you use
it
> on
> one ospf router, you must use it on all ospf routers in the domain (or
> maybe in the area, I'm not 100% sure). Better double check that.
>
> Re: Q 2 - I've tried using that ip dhcp-server command in a couple IE
> practice labs but never got it to work. I always needed to use the ip
> helper command instead. I also recall never being able to find out
why
> that
> was. Was it the 2500's I was using? The IOS release? My just
screwing
> up?
>
> I never found out.
>
> HTH, Tim
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Jason Edelman (jaedelma)
> Sent: Monday, November 14, 2005 5:52 PM
> To: ccielab@groupstudy.com
> Subject: 2 Questions
>
> Hi all,
>
>
>
> Two questions:
>
>
>
> 1. In calculating the ospf metric for an etherchannel, is it
> autorefbw / (sum of links in etherchannel)?
>
> So by default, with 2x 100Meg links in an etherchannel, would it be
> 100Meg/200Meg, obviously yielding in a 1 for the OSPF cost. In this
> situation, we would increase the refbw...
>
>
>
> 2. Has anyone seen the 'ip dhcp-server' command used in a situation
> other than when configuring dhcp over PPP in the IPCP negotiation
> process?
>
>
>
> Thanks,
>
> Jason
>
>
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