From: Gary Duncanson (gary.duncanson@googlemail.com)
Date: Mon Sep 24 2007 - 12:44:14 ART
Alex,
Very true. When you are pretty busy working sometimes a quick response is
the best one can do at the time.
----- Original Message -----
From: "Alexander Belov" <abelov@technoserv.ru>
To: "'shiran guez'" <shiranp3@gmail.com>
Cc: <ccielab@groupstudy.com>
Sent: Monday, September 24, 2007 3:48 PM
Subject: RE: Tunnel Config
> 1. Lets try to consider each other as polite engineers :-), 'cause
> even getting a number doesn't make the one even a pro, You are just
> passing
> the exam - the one possible scenario that was on lab.
>
> And GS is for people sharing their ideas. even if they consist of some
> critics with no real relations to the question itself like Shiran did - we
> are free to speak here our ideas, but sometime :-) we don't have enough
> time
> to explain. just to give a hint?
>
> 2. Wasn't that really obvious what ip addresses are for on tunnel?
> :-)
> Loopback IPs are giving You a little bit of flexibility as you can reach
> them instead of fixed interfaces (i.e. physical if) addresses. And p-2-p
> IPs
> on int tunnel may help You understand whether Your tunnelis up/down.
>
> WBR,
>
> Alex
>
>
>
>
>
> From: shiran guez [mailto:shiranp3@gmail.com]
> Sent: Monday, September 24, 2007 6:32 PM
> To: Andris Zarins
> Cc: Alexander Belov; Tandou Mohamed; ccielab@groupstudy.com
> Subject: Re: Tunnel Config
>
>
>
> no offence taken but what you just now did is give an explanation, and
> this
> mean that behind this 2 cent advice there is a explanation and not just
> "do
> ..." and it will work there is a reason and my guess is that as a
> professional you need to know the reason and not just the list of 2 cent
> advice.
>
>
>
> again I all for a quick solution but with understanding that this quick
> solution is not from something you saw some where, and you are doing like
> a
> dummy from this day on without knowing why!
>
>
>
>
>
>
>
> On 9/24/07, Andris Zarins <a.zarins@lattelecom.lv> wrote:
>
> Shiran, I think you are talking bullshit, my friend, no offence. There
> are a lot of 'just my 2 cent' advices, and here goes another one.
>
> Either loopbacks, or physical/logical addreses will work just fine.
> Final conclusion depends of either you have just one link/route traffic
> can flow, or there are several (like backup links and so on) and if
> there are some additional issues you have to deal with. One thing (proly
> - the most important) you must keep in mind - both tunnel endpoint
> addresses (tunnel destination and source) address must be reachable. So
> if you arent using directly connected interface addresses, you will need
> some static/dynamic routing to make far end address reachable, so I'd
> advice to avoid it by using directly connected interface addresses on
> both ends.
>
> If you have some backup links, and you want the tunnel to be UP at all
> times - interface addresses wont work, as interface might be DOWN at
> some moment, in that case - use loopbacks and make sure they are
> reachable via primary and backup link at all times. If you dont have to
> save address space, or dont have some technical reasons why you have to
> use 'unnumbered' on Tunnel interface, dont use 'unnumbered', as it will
> ease troubleshooting in case you need it.
>
>
>
> Hope it helps,
> Andris
> #17473
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto: nobody@groupstudy.com
> <mailto:nobody@groupstudy.com> ] On Behalf Of
> shiran guez
> Sent: Monday, September 24, 2007 4:08 PM
> 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>
> [mailto:nobody@groupstudy.com] On Behalf
> Of
>> Tandou Mohamed
>> Sent: Monday, September 24, 2007 4:12 PM
>> To: ccielab@groupstudy.com <mailto: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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>
>
>
> --
> Shiran Guez
> MCSE CCNP NCE1
> http://cciep3.blogspot.com
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
> --
> Shiran Guez
> MCSE CCNP NCE1
> http://cciep3.blogspot.com
>
> _______________________________________________________________________
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