From: Jason Madsen (madsen.jason@gmail.com)
Date: Mon Oct 27 2008 - 18:33:12 ARST
not sure I follow you unless you're saying it could be that the two
different statements do the same thing. I know that "show queueing"
lists them one on top of the other (as typed and not converted to one
or the other). Also, I saw them used in a CCBootcamp lab...lab 17 I
believe it is and the requirement for the "IP" statement was to
specify a priority for http "traffice", whereas the "http" statement
was to specify a priority for "http packets". Not sure if the writer
of that particular lab even knew the difference between the two syntax
usages or if there actually is one at all. The doc cd certainly
doesn't seem to differentiate between the two.
Jason
On 10/27/08, Scott M Vermillion <scott_ccie_list@it-ag.com> wrote:
> Can't say 100% for certain in the particular case, but a lot of times when
> you see a command that allows for variations that either include or exclude
> 'ip', it's because an 'ipv6' variation was introduced. So since there's a
> new 'ipv6' variation, they throw 'ip' into the syntax to explicitly chose
> IPv4. Likewise, Cisco from time to time tweaks the syntax of commands to
> add additional functionality or flexibility. Check out what IOS does with
> the command as listed below (the first one that's referencing TCP port 80):
>
> R1(config)#priority-list 1 protocol ip high tcp 80
> R1(config)#do sh run | inc priority
> priority-list 1 protocol ip high tcp www
>
>
> This is not the only case where there are options to specify 'http' or 'www'
> or 'tcp 80', depending on the syntax you chose (or are forced to chose,
> depending on the IOS version you happen to be standing in front of) and it's
> also not the only example of IOS placing the command in the config as it
> deems appropriate, regardless of what you may have typed.
>
> I haven't labbed this specific example (a little tight on time at the
> moment), so I again stress that this is more of a generic "response" than a
> specific "answer." It kind of adds up, though, when you consider that there
> would be no way to invoke IPv6 with the second syntax:
>
> R1(config)#priority-list 1 protocol http high ?
> gt Prioritize packets greater than a specified size
> lt Prioritize packets less than a specified size
> <cr>
>
> Whereas:
>
> R1(config)#priority-list 1 protocol ipv6 high ?
> gt Prioritize packets greater than a specified size
> lt Prioritize packets less than a specified size
> <cr>
>
> (and it would appear that your options (in terms of referencing an ACL, a L4
> transport/port number, or upper-layer protocol keyword) are considerably
> limited with IPv6 vs. IPv4, but at least there's *some* support for the
> protocol with that syntax - and that's often times the case with IPv6 in
> IOS)
>
> Cheers,
>
> Scott
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Jason Madsen
> Sent: Monday, October 27, 2008 12:53 PM
> To: Hobbs
> Cc: Cisco certification
> Subject: Re: Priority List Usage
>
> it worked fine for me on a couple of different platforms of which used
> fairly new IOS's. the commands were accepted as they both appeared in
> my "show queueing" output also.
>
> anyone able to distinguish between the two commands?
>
> Jason
>
> On 10/27/08, Hobbs <deadheadblues@gmail.com> wrote:
>> I don't think the second one is a command is it?
>>
>> priority-list 1 protocol http ?
>> % Unrecognized command
>>
>> On Sat, Oct 25, 2008 at 11:09 PM, Jason Madsen
>> <madsen.jason@gmail.com>wrote:
>>
>>> Hi Group,
>>>
>>> I was wondering if anyone knows the difference between the following
>>> priority list examples:
>>>
>>>
>>> priority-list 1 protocol ip high tcp 80
>>>
>>> and
>>>
>>> priority-list 1 protocol http high
>>>
>>> I'm a bit tired so I could be missing the obvious here, but the config'
>>> guide and command reference aren't of much help in this matter and the
> two
>>> statements pretty much seem the same to me.
>>>
>>> Thanks,
>>> Jason
>>>
>>>
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