From: Connary, Julie Ann (jconnary@xxxxxxxxx)
Date: Wed Dec 27 2000 - 10:35:06 GMT-3
Thanks, that makes sense. I guess the software just knows to skip the 3rd
parameter since 1000 is greater than 100.
Julie Ann
At 03:09 PM 12/26/2000 -0800, D. J. Jones wrote:
>Julie Ann,
>
>I think what the fair-queue 64 256 1000 statement is saying is that you will
>have 64 allowed messages in each queue, 256 dynamic queues to be used for
>best effort conversations and a maximum buffer size of 1000 bytes.
>
>The number of reserved queues which you may be thinking of only has a range
>from 0 to 100 and a default value of 2. If you were to use all of the
>optional parms, then your statement would read:
>
>fair-queue 64 16 2 600
>
>If someone else reads this differently, please let me know..dj
>
>Here is a reference URL
>
>http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/wan_
>r/wrdfrely.htm#37411
>
>----- Original Message -----
>From: "Connary, Julie Ann" <jconnary@cisco.com>
>To: <ccielab@groupstudy.com>
>Sent: Tuesday, December 26, 2000 1:40 PM
>Subject: frame relay traffic shaping and rsvp
>
>
> > Hi All,
> >
> > I am working on a lab that calls for frame-relay traffic shaping and rsvp.
> >
> > My question is that when fair queing is enabled, the solution says:
> >
> > fair-queue 64 256 1000
> >
> > Does this not set up 1000 rsvp queues ( fair-queue
> > [congestive-discard-threshold[dynamic-queues[reservable-queues]]]] and why
> > would I need that many? Or am I misenterpreting the 1000?
> >
> >
> > Also what experience do people have using frame-relay traffic shaping with
> > map-classes vs. using the
> > traffic-shape rate command directly under the interface ( (From the
>command
> > reference for 12.0)?
> >
> > ------------------------------------------------
> >
> > traffic-shape rate
> >
> > To enable traffic shaping for outbound traffic on an interface, use the
> > traffic-shape rate interface configuration command. To disable traffic
> > shaping on the interface,
> > use the no form of this command.
> >
> > traffic-shape rate bit-rate [burst-size [excess-burst-size]]
> > no traffic-shape rate
> >
> > Syntax Description
> >
> > bit-rate
> > Bit rate that traffic is shaped to in bits per second.
>This
> > is the access bit rate that you contract with your service provider, or
>the
> > service levels you intend to
> > maintain.
> > burst-size
> > (Optional) Sustained number of bits that can be
>transmitted
> > per interval. On Frame Relay interfaces, this is the committed burst size
> > contracted with your service
> > provider.
> > excess-burst-size
> > (Optional) Maximum number of bits that can exceed the
>burst
> > size in the first interval in a congestion event. On Frame Relay
> > interfaces, this is the excess burst size
> > contracted with your service provider. The default is
>equal
> > to the burst-size.
> >
> >
> >
> > Default
> >
> > Traffic shaping is disabled.
> >
> > Command Mode
> >
> > Interface configuration
> >
> > Usage Guidelines
> >
> > This command first appeared in Cisco IOS Release 11.2.
> >
> >
> > Note Traffic shaping is not supported with optimum, distributed, or flow
> > switching. If you enable this command, all interfaces will revert to fast
> > switching:
> >
> >
> > Traffic shaping uses queues to limit surges that can congest a network.
> > Data is buffered and then sent into the network in regulated amounts to
> > ensure that traffic will
> > fit within the promised traffic envelope for the particular connection.
> >
> > Use traffic shaping if you have a network with differing access rates or
>if
> > you are offering a subrate service. You can configure the values according
> > to your contract
> > with your service provider or the service levels you intend to maintain.
> >
> > An interval is calculated as follows:
> >
> > If the burst-size is not equal to zero, the interval is the
> > burst-size divided by the bit-rate.
> >
> > If the burst-size is zero, the interval is the excess-burst-size
> > divided by the bit-rate.
> >
> > Traffic shaping is supported on all media and encapsulation types on the
> > router. To perform traffic shaping on Frame Relay virtual circuits, you
>can
> > also use the
> > frame-relay traffic-shaping command. For more information on Frame Relay
> > traffic shaping, refer to the "Configuring Frame Relay" chapter in the
> > Wide-Area
> > Network Configuration Guide.
> >
> > ------------------------------------------------------------
> >
> >
> > Thanks,
> > Julie Ann
> > ------------------------------------------------------------------------
> > Julie Ann Connary
> > | | Network Consulting Engineer
> > ||| ||| Federal Support Program
> > .|||||. .|||||. 13635 Dulles Technology Drive,
> > Herndon VA 20171
> > .:|||||||||:.:|||||||||:. Pager: 1-888-642-0551
> > c i s c o S y s t e m s Email: jconnary@cisco.com
> >
> > ------------------------------------------------------------------------
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