RE: Custom Queuing

Anantha,

I think you're understanding is correct:

Rack1R1(config)#queue-list ?
  <1-16> Queue list number

Rack1R1(config)#queue-list 0 ?
% Unrecognized command

http://www.cisco.com/en/US/partner/docs/ios/qos/configuration/guide/congstion_mgmt_oview.html#wp1003648

Queue number 0 is a system queue; it is emptied before any of the queues numbered 1 through 16 are processed. The system queues high priority packets, such as keepalive packets and signalling packets, to this queue. Other traffic cannot be configured to use this queue.

The phrase 'high priority packets, such as' is ambiguous, so I'm not really sure about routing updates.

Clearly RIP qualifies as a high priority packet though :)

-ryan

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of Anantha Subramanian Natarajan
Sent: Monday, August 24, 2009 4:16 PM
To: Narbik Kocharians; Cisco certification
Subject: Re: Custom Queuing

Hi Narbik,

   Thank you for the response.Is queue 0 is user configurable .I may be
totally wrong but for somereason I read that it cannot be set by user.But
will take your understanding until I get more clarity on that.

Thanks Narbik

Regards
Anantha Subramanian Natarajan

On Mon, Aug 24, 2009 at 3:10 PM, Narbik Kocharians <narbikk_at_gmail.com>wrote:

> From what i recall, the system queue (Queue 0), is the priority Queue and
> it handles Layer 2 keepalives ONLY (By default) and NOT routing updates,
> however, you can assign them to Queue 0 if you need to.
>
> On Mon, Aug 24, 2009 at 12:56 PM, Scott Morris <smorris_at_ine.com> wrote:
>
>> My teeth don't feel longer. But yes, indeed... the queue 0 is used for
>> many layer2 keepalives as well as routing protocol hellos/updates.
>>
>> Specifically IS-IS, EIGRP and OSPF use it for sure. I haven't found
>> anything telling me whether BGP did or not, and I don't recall ever
>> caring to do debugs on it to be sure, so I wouldn't count on that one.
>>
>> Perhaps someone whose teeth FEEL longer may remember something more on
>> that (grin). RIP does not make that list, by the way. *shrug*
>>
>>
>>
>>
>> *Scott Morris*, CCIE/x4/ (R&S/ISP-Dial/Security/Service Provider) #4713,
>>
>>
>> JNCIE-M #153, JNCIS-ER, CISSP, et al.
>>
>> JNCI-M, JNCI-ER
>>
>> evil_at_ine.com
>>
>>
>> Internetwork Expert, Inc.
>>
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>>
>> Toll Free: 877-224-8987
>>
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>>
>> Knowledge is power.
>>
>> Power corrupts.
>>
>> Study hard and be Eeeeviiiil......
>>
>>
>>
>>
>>
>>
>> Anthony Sequeira wrote:
>> > I seem to recall this system queue DOES NOT include routing protocol
>> > traffic.
>> >
>> > Perhaps someone "longer in the tooth" can elaborate more for us.
>> >
>> > :-)
>> >
>> > Warmest Regards,
>> >
>> > Anthony J. Sequeira, CCIE #15626
>> > http://www.INE.com <http://www.ine.com/>
>> >
>> > Test your Core Knowledge today!
>> > Q: What OSPF feature allows LSA updates to be refreshed in groups, as
>> > opposed to on-demand?
>> > A: LSA Pacing
>> > More Info:
>> > http://www.cisco.com/en/US/docs/ios/11_3/feature/guide/ospfpace.html
>> >
>> >
>> > On Aug 24, 2009, at 1:15 PM, Anantha Subramanian Natarajan wrote:
>> >
>> >> Hi All,
>> >>
>> >> I have a basic question on Custom Queuing.When we enable custom
>> >> queuing on
>> >> an interface on cisco routers,we will have 17 queues right.where
>> >> queue 1 to
>> >> 16 is user configurable and queue 0 is system queue(non-user
>> >> configurable).I
>> >> am understanding that system queue will take care keepalives and
>> >> sigalling
>> >> traffic.Is it includes Routing protocol traffic and also traffic
>> >> destined to
>> >> routers or sourced from routers.
>> >>
>> >> Thanks for the help
>> >>
>> >> Regards
>> >> Anantha Subramanian Natarajan
>> >>
>> >>
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>
>
> --
> Narbik Kocharians
> CCSI#30832, CCIE# 12410 (R&S, SP, Security)
> www.MicronicsTraining.com <http://www.micronicstraining.com/>
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Received on Mon Aug 24 2009 - 16:35:39 ART