Hi all,
OK the reason I asked.
A colleague set me up a troubleshooting lab. All commands were authorized via
TACACS. "show run", "show start", "more nvram:running-config" etc etc etc
were ALL banned. There was AAA accounting on there was well, and any attempt
to use them was an instant fail.
As was any piped version. So:
"show runn | s ospf" was banned.
"show runn | b 0/1/0" was banned
"show runn | i pim" was banned.
You get the idea. You not only had to use other command to find out what the
problem was, BUT, you could not see the syntax of an offending command to
remove it!! If necessary, you had to get all parameters from show commands,
get syntax from docCD, issue the "no" version blind, issue the proper version
and could only verify by other command than "show runn".
The lab was a full CCIE mock: 2 hours, 10 tickets....80% pass mark.
I challenge you: next time you do either a config lag or a troubleshoot lab,
see how far you get before you have to...or would normally....resort to a "show
run" or variant!!!!
For all the "purists" out there, I think it will come as a bit of a shock!!
Happy labbing.
Regards George.
Date: Wed, 30 May 2012 08:48:26 -0500
Subject: Re: [OSL | CCIE_RS] Troubleshooting section on R&S exam
From: [email protected]
To: [email protected]
CC: [email protected]; [email protected]
One thing to be careful with show run is that they could put in fake
access-lists, route-maps, etc. These take you some time to figure out they
aren't actually causing your problem.
Maybe you see an access-list that denies OSPF. Ah ha! you think, surely this is
why my neighbor isn't coming up. A minute later you find that the access-list
isn't called anywhere. Now you have spent an extra minute and are still no
closer to a solution.
That said, sometimes the fastest way to find the issue is show run. For
instance I think that a "show run int s0/1" is a great way to start
troubleshooting a frame relay problem.
On Wed, May 30, 2012 at 7:39 AM, Jay McMickle <[email protected]> wrote:
No limitations.
I think Marc Abel said it the other day about ACL's, too. Don't remove them if
they are the issue. Simply prepend the appropriate statement in a higher
sequence to make it work.
Troubleshooting is a difficult area to state don't use "sh run". However, it
should be the last measure. If you are told to reach a router from a router,
think routing protocols, tables, and reachability. A sh ip route x x, or a sh
run | s router or sh ip protocols would be your first check. If the route
exists, go to the next item- remote device route filtering, interface ACL,
traceroute, etc.
An instructor once told me- Take a quick guess after thinking about a top 3
issues list. Take a quick look, and then think about what type of command it
would be that would cause the issue. Is it a global command or interface
command. That idea was the best single piece of advice I received.
In summary- think about the sections of the config that would be the problem,
after thinking about the technology that would enable it. Then, view only those
sections and resolve it and move on.
The secret of my success was repetition, multiple vendors, and labbing,
labbing, followed by labbing. I logged 150+ hours of actual rack time the 5
weeks leading up to my lab, with no days off. I was labbing 4+ hours a day, and
it paid off. Don't get relaxed about fulfilling your dream. Go get it- sleep
later!
Happy labbing!
Regards,
Jay McMickle- CCIE #35355 (R&S)
Sent from iJay
On May 30, 2012, at 4:30 AM, George Leslie <[email protected]> wrote:
>
>
>
>
> Hi all,Very simple question! On the troubleshooting section of the real exam,
> are you barred from using "show runn" or "show start"? Reason I ask is that
> lots of verification you see in the lab books and the videos tend to shy away
> from using show runn etc. I just wondered if this was to try and build good
> habits, or out of necessity due to show runn being not allowed? Regards,
> George.
> _______________________________________________
> For more information regarding industry leading CCIE Lab training, please
> visit www.ipexpert.com
>
> Are you a CCNP or CCIE and looking for a job? Check out
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>
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_______________________________________________
For more information regarding industry leading CCIE Lab training, please visit
www.ipexpert.com
Are you a CCNP or CCIE and looking for a job? Check out
www.PlatinumPlacement.com
http://onlinestudylist.com/mailman/listinfo/ccie_rs
--
Marc AbelCCIE #35470(Routing and Switching)
_______________________________________________
For more information regarding industry leading CCIE Lab training, please visit
www.ipexpert.com
Are you a CCNP or CCIE and looking for a job? Check out
www.PlatinumPlacement.com
http://onlinestudylist.com/mailman/listinfo/ccie_rs
