From: Pavel Bykov (slidersv@gmail.com)
Date: Sun Nov 23 2008 - 17:00:28 ARST
I think in this case, person writing DOC CD didn't quite understand the
technology.
Happens all the time. For example, in the ASR 9000 data sheet, AutoRP
is "Automatic
route processing". Seems that person writing it was using google and not
"Acronym Finder".
Or just thinking logically - it's a protocol that automatically selects
Rendezvous Point.... nor automatically process routes.
http://www.cisco.com/en/US/prod/collateral/routers/ps9853/data_sheet_c78-501767.html
On Sat, Nov 22, 2008 at 2:00 PM, Huan Pham <pnhuan@yahoo.com> wrote:
> Hi,
>
> I posted a similar question few months ago, and I got a very good answer
> from Narbik. I also believe his answer is right.
>
> http://www.groupstudy.com/archives/ccielab/200806/msg01899.html
>
> However, today, I came accross an example in DOC CD, which left me
> wondering, whether DOC CD example is wrong or not. I did come accross few
> wrong example in the Doc CD before, and I believe this one is another one.
>
> Really need your opinion on this, to clear things up.
>
> Here's the link to the DOC CD:
>
>
> http://www.cisco.com/en/US/docs/ios/qos/command/reference/qos_s1.html#wp1014690
>
> shape
>
> To specify average or peak rate traffic shaping, use the shape command in
> class-map configuration mode. To remove traffic shaping, use the no form of
> this command.
>
> shape {average | peak} cir [bc] [be]
>
> =================================================================
>
> The following example uses peak rate shaping to ensure a bandwidth of 300
> kbps but allow throughput up to 512 kbps if enough bandwidth is available on
> the interface:
>
> bandwidth 300
> shape peak 512000
>
> =================================================================
>
>
> In my opinion, this configuration will give a peak rate of 1024K, instead
> of 512K.
>
> here's the config, and what the show policy interface output:
>
>
> Rack1R1#
> class-map match-all WWW
> match protocol http
>
> policy-map SHAPE
> class WWW
> bandwidth 300
> shape peak 512000
>
> interface Serial0/0
> service-policy output SHAPE
>
> Rack1R1#sh policy-map interface
> Serial0/0
> Service-policy output: SHAPE
> Class-map: WWW (match-all)
> 0 packets, 0 bytes
> 5 minute offered rate 0 bps, drop rate 0 bps
> Match: protocol http
> Queueing
> Output Queue: Conversation 265
> Bandwidth 300 (kbps)Max Threshold 64 (packets)
> (pkts matched/bytes matched) 0/0
> (depth/total drops/no-buffer drops) 0/0/0
> Traffic Shaping
> Target/Average Byte Sustain Excess Interval Increment
> Rate Limit bits/int bits/int (ms) (bytes)
> 1024000/512000 3200 12800 12800 25 3200
> Adapt Queue Packets Bytes Packets Bytes Shaping
> Active Depth Delayed Delayed Active
> - 0 0 0 0 0 no
> Class-map: class-default (match-any)
> 1 packets, 13 bytes
> 5 minute offered rate 0 bps, drop rate 0 bps
> Match: any
>
>
> I think the solution should be, following. Any opinion please?
>
> bandwidth 300
> shape peak 300000 37500 26500
>
> Rack1R1#show policy-map interface
> Serial0/0
> Service-policy output: SHAPE
> Class-map: WWW (match-all)
> 0 packets, 0 bytes
> 5 minute offered rate 0 bps, drop rate 0 bps
> Match: protocol http
> Queueing
> Output Queue: Conversation 265
> Bandwidth 300 (kbps)Max Threshold 64 (packets)
> (pkts matched/bytes matched) 0/0
> (depth/total drops/no-buffer drops) 0/0/0
> Traffic Shaping
> Target/Average Byte Sustain Excess Interval Increment
> Rate Limit bits/int bits/int (ms) (bytes)
> 512000/300000 8000 37500 26500 125 8000
> Adapt Queue Packets Bytes Packets Bytes Shaping
> Active Depth Delayed Delayed Active
> - 0 0 0 0 0 no
> Class-map: class-default (match-any)
> 293 packets, 64409 bytes
> 5 minute offered rate 0 bps, drop rate 0 bps
> Match: any
>
>
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-- Pavel Bykov ---------------- Don't forget to help stopping the braindumps, use of which reduces value of your certifications. Sign the petition at http://www.stopbraindumps.com/Blogs and organic groups at http://www.ccie.net
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