Re: Custom Queuing

Thank you scott for the explanation.

Regards
Anantha Subramanian Natarajan

On Mon, Aug 24, 2009 at 6:12 PM, Scott Morris <smorris_at_ine.com> wrote:

> And by that logic, RIP would be included. What you're referring to
> (assumed, whether intended or not!) is the PAK Priority concept that a
> router does to important traffic. :) That's true of any of the QoS
> functions.
>
> I just figured it was a slight against RIP to not specifically list it in
> Custom queueing's Queue 0, but it may have been an oversight (grin)
Bummer
> on that.
>
>
>
>
> *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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>
> Ryan West wrote:
>
> 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
<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>
<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>
<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.
> http://www.InternetworkExpert.com <http://www.internetworkexpert.com/>
<http://www.internetworkexpert.com/> <http://www.internetworkexpert.com/>
>
> Toll Free: 877-224-8987
>
> Outside US: 775-826-4344
>
>
> 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 #15626http://www.INE.com <http://www.ine.com/>
<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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> --
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Received on Mon Aug 24 2009 - 18:54:10 ART