Indeed, quite some practice labs tend to use the hidden commands.
Like the TS said the bgp bestpath as-path ignore is one of the most famous.

And they are 'hidden' commands so nowhere to be included in the reference.
They are mostly added by developers to ease debugging or test stuff (like
crashing) and others are added per feature request of big customers.


--

Regards,

Rick Mur
CCIE2 #21946 (R&S / Service Provider)
Sr. Support Engineer – IPexpert, Inc.
URL: http://www.IPexpert.com


On Sun, Oct 25, 2009 at 2:45 AM, Erik Fairbanks <[email protected]> wrote:

> There is an IPE lab that utilizes a hidden command for PPP (if I remember
> correctly).
>
> -Erik
>
>
> On Sun, Oct 25, 2009 at 10:10 AM, Steve Shaw <[email protected]> wrote:
>
>> Guys,
>>
>> Kinda off-topic, but does anyone have a list of hidden IOS commands
>> for 12.4/12.2? I can't imagine anything on the lab would utilize a
>> hidden command as a solution but as said before, anything is fair
>> game!
>>
>> Steve
>>
>> On 10/24/09, Matt Hill <[email protected]> wrote:
>> > Hi Christian,
>> >
>> > "Show run all" and similar derivatives on most platforms will show you
>> > the current config plus any defaults you might have.
>> >
>> > Cheers,
>> > Matt
>> >
>> > CCIE #22386
>> > CCSI #31207
>> >
>> > 2009/10/25 Christian Medina <[email protected]>:
>> >> Adrian,
>> >>
>> >> Interesting site, I support FWSM and I have added configuration lines
>> to
>> >> the config file. When I type command sh run I don’t see the lines of
>> >> configuration. Is there a way to see all the lines in the config file
>> >> across all Cisco platforms?
>> >>
>> >> Thanks,
>> >>
>> >>
>> >>
>> >>
>> >> Adrian Brayton wrote:
>> >>> Well I found a list of all the hidden commands... Here is a link!
>> >>>
>> >>> http://www.elemental.net/~lf/undoc/<http://www.elemental.net/%7Elf/undoc/>
>> >>>
>> >>> I just want to make those hidden commands appear when I hit "?" if it
>> is
>> >>> possible!
>> >>>
>> >>> Thanks
>> >>>
>> >>>
>> >>>
>> >>> On Oct 24, 2009, at 12:52 PM, Christian Medina wrote:
>> >>>
>> >>>> Adrian,
>> >>>>
>> >>>> What Platform are you using and what code are you running?
>> >>>> I have seen this on the Cisco firewall OS but not the
>> routers/switches.
>> >>>>
>> >>>> Adrian Brayton wrote:
>> >>>>> There are commands available to you that are hidden and don't show
>> up
>> >>>>> when you use the question mark... Crazy I know ;)
>> >>>>> Example:
>> >>>>> Router(config-router)#bgp bestpath ?
>> >>>>>  compare-routerid  Compare router-id for identical EBGP paths
>> >>>>>  cost-community    cost community
>> >>>>>  med               MED attribute
>> >>>>> Router(config-router)#bgp bestpath as-path ignore
>> >>>>> Router(config-router)#
>> >>>>> You can see when I hit the question mark "?" the command didnt show
>> >>>>> up that I used but its there if you know it exists...
>> >>>>> Router(config-router)#bgp bestpath as-path ignore
>> >>>>> Router(config-router)#
>> >>>>> Thats what I am talking about!!
>> >>>>> On Oct 24, 2009, at 12:19 PM, nicholas golden wrote:
>> >>>>>> Eh? Interesting, I don't have anything to add as I really don't
>> >>>>>> understand what you are asking :)
>> >>>>>> What you mean by "appear" exactly?
>> >>>>>>
>> >>>>>> :)
>> >>>>>>
>> >>>>>> --- On *Sat, 10/24/09, Adrian Brayton /<[email protected]
>> >>>>>> <mailto:[email protected]>>/* wrote:
>> >>>>>>
>> >>>>>>
>> >>>>>>    From: Adrian Brayton <[email protected]
>> >>>>>> <mailto:[email protected]>>
>> >>>>>>    Subject: [OSL | CCIE_RS] IOS Commands
>> >>>>>>    To: "OSL CCIE-RS" <[email protected]
>> >>>>>>    <mailto:[email protected]>>
>> >>>>>>    Date: Saturday, October 24, 2009, 9:17 AM
>> >>>>>>
>> >>>>>>    Is there anyway in the IOS to enable commands to appear with the
>> >>>>>> "?"     that are hidden?
>> >>>>>>
>> >>>>>>    I couldn't find anything when I googled it...
>> >>>>>>
>> >>>>>>    Just curious...
>> >>>>>>    _______________________________________________
>> >>>>>>    For more information regarding industry leading CCIE Lab
>> training,
>> >>>>>>    please visit www.ipexpert.com <http://www.ipexpert.com>
>> >>>>>>
>> >>>>>>
>> >>>>>
>> ------------------------------------------------------------------------
>> >>>>> _______________________________________________
>> >>>>> For more information regarding industry leading CCIE Lab training,
>> >>>>> please visit www.ipexpert.com
>> >>>>
>> >>>> --
>> >>>> Christian Medina
>> >>>> Network Engineer
>> >>>> Brandeis University
>> >>>> 781-736-4960
>> >>>> [email protected]
>> >>>>
>> >>>
>> >>
>> >> --
>> >> Christian Medina
>> >> Network Engineer
>> >> Brandeis University
>> >> 781-736-4960
>> >> [email protected]
>> >>
>> >> _______________________________________________
>> >> For more information regarding industry leading CCIE Lab training,
>> please
>> >> visit www.ipexpert.com
>> >>
>> > _______________________________________________
>> > For more information regarding industry leading CCIE Lab training,
>> please
>> > visit www.ipexpert.com
>> >
>>
>> --
>> Sent from my mobile device
>> _______________________________________________
>> For more information regarding industry leading CCIE Lab training, please
>> visit www.ipexpert.com
>>
>
>
> _______________________________________________
> For more information regarding industry leading CCIE Lab training, please
> visit www.ipexpert.com
>
>
_______________________________________________
For more information regarding industry leading CCIE Lab training, please visit 
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