Re: Tunnel Config

From: Gary Duncanson (gary.duncanson@googlemail.com)
Date: Tue Sep 25 2007 - 10:17:00 ART


Hi Clay,

I can relate to all that. Not least the kids. My son was born a couple of
weeks ago and what with also working fulltime it makes CCIE studytime rather
interesting!

There are different approaches, and it's important we consider that we don't
know it all before making any assertions about technology solutions and
people on this mailing list. Nobody likes a smart ass.

Best Regards
Gary
----- Original Message -----
From: "Clay K Auch (clauch)" <clauch@cisco.com>
To: "Guyler, Rik" <rguyler@shp-dayton.org>; <ccielab@groupstudy.com>
Sent: Tuesday, September 25, 2007 1:47 PM
Subject: RE: Tunnel Config

> Rik,
>
> Thank you for your comments. You point is taken and is the very reason I
> have kept the following quote close by:
>
> "Be like water making its way through cracks. Do not be assertive, but
> adjust to
> the object, and you shall find a way round or through it. If nothing
> within you
> stays rigid, outward things will disclose themselves." -- Bruce Lee
>
> It is a true detriment to be rigid with regard to our approach to this
> journey which we call the "CCIE". I have experienced and have seen others
> experience the results of becoming too comfortable with any one way to do
> any particular "thing". I choose the word "thing" very carefully because
> every part what we doing during this learning process is for that very
> reason ... To learn. I have even gone as far as never using the same OSPF
> process when configuring my exercises so that I am forced to pay attention
> to the actual process number vs. relying on "muscle memory" to guide me.
>
> Last, but certainly not least ... As we are all passing through this
> gauntlet, let us remember our sense of humor ... Hence, my sitting here
> typing this with my 5 yr old daughter sitting on my lap and my twin
> (almost 2 yr old) boys pulling at the cables under my desk. Support is why
> this forum exists.
>
> Thanks all for your help thus far.
>
> Clay
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Guyler, Rik
> Sent: Monday, September 24, 2007 7:23 PM
> To: ccielab@groupstudy.com
> Subject: RE: Tunnel Config
>
> My, my...different opinions abound on this topic. Are they wrong? Are
> they right?
>
> For those of you that haven't had the pleasure of taking the lab before
> now, let me tell that the answer to all "best way to do this" questions is
> IT DEPENDS where the lab is concerned. The truth is there is no best way.
> There is only the Cisco way depending on what the lab requirements are.
> If you deviate from that, even though you think your way works better, you
> will miss those points. No question.
>
> Now in a real-world scenario the answer can also depend. If you only have
> a single connection between the two hosts then is link stability really an
> issue? If my only "outside" (ie public) interface goes down then do I
> care about the address availability that a loopback might provide? Why
> not use the physical interface in this situation? As in the lab, life is
> full of choices and they may all be right...or they may all be wrong. The
> answer as always is, it depends.
>
> Rik
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Mike M
> Sent: Monday, September 24, 2007 4:42 PM
> To: ccielab@groupstudy.com
> Subject: RE: Tunnel Config
>
> Hi, all
>
> This is not 2 cents worth!!
>
> Use a loopback interface as it is the most reliable interface in your
> network for tunnel source/destination.
>
> Regards
> Mike
>
> --- alexandros.sichlimiris@bt.com wrote:
>
>> Hi Shiran, when someone is asking for an opinion when choosing between
>> two options and not for a specific explanation of a technology, then
>> you would see a "2 cents" reply. This doesn't mean that whoever
>> replied does not know 100% the technology, it simply means that this
>> is his opinion on how to best implement the technology in question.
>> In short, a "2 cents" answer does not imply a less than perfect
>> knowledge of the technology.
>>
>> Cheers,
>> Alex
>>
>> -----Original Message-----
>> From: nobody@groupstudy.com
>> [mailto:nobody@groupstudy.com] On Behalf Of shiran guez
>> Sent: 24 September 2007 14:08
>> To: Alexander Belov
>> Cc: Tandou Mohamed; ccielab@groupstudy.com
>> Subject: Re: Tunnel Config
>>
>> guys although every opinion count here I think that to give this "2
>> cent advice" is the worse we can do, if we want to consider our self
>> Experts then we need to act like it and understand that there are very
>> few 2 cent advice and mostly are focused on tricks like making the
>> status prompt on the IOS disappear.
>>
>> but as far as technology there are no "2 cent advice" it is either you
>> understand or you do not, and if you do not understand then your "2
>> cent advice" will work may be 90% if you lucky but in case you get a
>> question that need your full understand it will not work and you will
>> not know why.
>>
>>
>> I hope that more will agree with me on that view
>>
>> On 9/24/07, Alexander Belov <abelov@technoserv.ru>
>> wrote:
>> >
>> > Hi mate!
>> >
>> > I'd say - Loopback IPs for tunnel source/dest and
>> /30 network on
>> tunnel
>> > (ip
>> > address 192.168.x.1/30 vs ip address
>> 192.168.x.2/30)...
>> >
>> > My 2 cents
>> >
>> > -----Original Message-----
>> > From: nobody@groupstudy.com
>> [mailto:nobody@groupstudy.com] On Behalf Of
>> > Tandou Mohamed
>> > Sent: Monday, September 24, 2007 4:12 PM
>> > To: ccielab@groupstudy.com
>> > Subject: Tunnel Config
>> >
>> > GS,
>> > When configuring a tunnel interface, what is the
>> best option to use
>> for
>> > tunnel source and tunnel destination if no
>> direction is given? i
>> always
>> > use
>> > the loopback interface for tunnel source and
>> destination and also for
>> > tunnel
>> > ip address using ip unnumbered. Some of the vendor
>> workbooks sometimes
>> use
>> > loopback or physical ip addresses. Can someone
>> explain if i am doing
>> > something wrong ?
>> >
>> > Thanks,
>> >
>> > TM
>> >
>> >
>> > ---------------------------------
>> > Moody friends. Drama queens. Your life? Nope! -
>> their life, your
>> story.
>> > Play Sims Stories at Yahoo! Games.
>> >
>> >
>>
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>>
> _______________________________________________________________________
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>>
>>
>>
>> --
>> Shiran Guez
>> MCSE CCNP NCE1
>> http://cciep3.blogspot.com
>>
>>
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