From: Larry (cc13lab@gmail.com)
Date: Wed Aug 20 2008 - 10:58:32 ART
Thanks for all the information! Glad I am taking Narbiks' bootcamp next
month so I can hash things out like this before my final attempt :)
-larry
On 8/20/08, stephen skinner <stephenski@gmail.com> wrote:
>
> Thanks petr
>
>
>
> Thats great
>
>
>
> From: petrsoft@gmail.com [mailto:petrsoft@gmail.com] On Behalf Of Petr
> Lapukhov
> Sent: 20 August 2008 17:03
> To: stephen skinner
> Cc: Larry; Cisco certification
> Subject: Re: Remaining Percent??
>
>
>
> CBWFQ allocates static flow queues to user-defined classes and dynamic
> flows
> to unclassified traffic (unless class-default has manually assigned
> bandwidth weight).
>
>
>
> Firstly, when you issue "show policy map interface" you will see
> conversation number next to the class name (e.g. Conversation 41, or
> Coversation 264). This is the static flow number assigned to this class,
> and
> it will later re-apper under "show queueing interface" command output.
>
>
>
> Secondy, to see the active flows using "show queueining interface" you must
> heavily congest the interface. Only in this case the CBWFQ queue will fill
> up and you'll be able to see its contents. Therefore, you are not
> guaranteed
> to see all the flows at time with this commands - only the flows that have
> packets in their FIFO queues. The number of concurrent flows may be zeor or
> up to the maximum allowed by CBWFQ = number of user defined classes +
> number
> of dynamic flows.
>
>
>
> HTH
>
> --
> Petr Lapukhov, CCIE #16379 (R&S/Security/SP/Voice)
> petr@internetworkexpert.com
>
> Internetwork Expert, Inc.
> http://www.InternetworkExpert.com
> Toll Free: 877-224-8987
> Outside US: 775-826-4344
>
> 2008/8/20 stephen skinner <stephenski@gmail.com>
>
> Petr ,
>
> Can I ask a quick question regarding conversations in the "show queueing
> interface"
>
> Should I see one Conversation per policy-map instance
>
> Or should I see a Conversation per classification within a policy map ?
>
> i.e
>
> policy map 1 has three class statements in it
> policy-map 2 has 2 class statements in it
>
> when I do "show queueing interface" , should I see 5 or 2 Conversations
>
> Many thanks
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Petr
> Lapukhov
> Sent: 20 August 2008 15:56
> To: Larry
> Cc: Cisco certification
> Subject: Re: Remaining Percent??
>
> Larry,
> like it has been mentioned in this thread, we have recent post on our blog
> that explains CBWFQ mechanics in details. I've just updated it to add more
> comments on how various syntax applies to bandwidth computations. In your
> case, TFTP will actually have 100% "real" bandwidth in case of congestion,
> since there are no other classes configured with bandwidth settings ;) This
> follows directly from the fact that CBWFQ implements max-min sharing of the
> underlying resounce, and minimal guaranteed shares are relative to
> configured weights.
>
> --
> Petr Lapukhov, CCIE #16379 (R&S/Security/SP/Voice)
> petr@internetworkexpert.com
>
> Internetwork Expert, Inc.
> http://www.InternetworkExpert.com
> Toll Free: 877-224-8987
> Outside US: 775-826-4344
>
> 2008/8/20 Larry <cc13lab@gmail.com>
>
> > Hey GS,
> >
> > I have a task that reads something like this:
> >
> > prioritize 1000k of telnet. ensure tftp gets 25% of the remaing bandwidth
> ,
> > do not use bandwidth or bandwidth percent to accohmplish this and use the
> > default max-reserved-bandwidth value.
> >
> > My solution below with output (which I am having a hard time saying it is
> > 100% correct). Question is bandwidth remaining percent using the total
> > interface bandwidth to calculate its value or the available bandwidth as
> > shown in the show queueing output??? I have read and searched on this but
> > the words - total/absolute/availabe are all being used interchangable
> > leading me to doubts. Thank you for your help.
> >
> >
> >
> > !
> > class-map match-all TELNET
> > match protocol telnet
> > class-map match-all TFTP
> > match protocol tftp
> > !
> > !
> > policy-map TEST
> > class TFTP
> > bandwidth remaining percent 25
> > class TELNET
> > priority 1000
> >
> >
> > R3#show policy-map int e0/0
> > Ethernet0/0
> >
> > Service-policy output: TEST
> >
> > Class-map: TFTP (match-all)
> > 0 packets, 0 bytes
> > 5 minute offered rate 0 bps, drop rate 0 bps
> > Match: protocol tftp
> > Queueing
> > Output Queue: Conversation 265
> > Bandwidth remaining 25 (%) Max Threshold 64 (packets)
> > (pkts matched/bytes matched) 0/0
> > (depth/total drops/no-buffer drops) 0/0/0
> >
> > Class-map: TELNET (match-all)
> > 0 packets, 0 bytes
> > 5 minute offered rate 0 bps, drop rate 0 bps
> > Match: protocol telnet
> > Queueing
> > Strict Priority
> > Output Queue: Conversation 264
> > Bandwidth 1000 (kbps) Burst 25000 (Bytes)
> > (pkts matched/bytes matched) 0/0
> > (total drops/bytes drops) 0/0
> >
> > R3#show queueing interface e0/0
> > Interface Ethernet0/0 queueing strategy: fair
> > Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
> > Queueing strategy: Class-based queueing
> > Output queue: 0/1000/64/0 (size/max total/threshold/drops)
> > Conversations 0/1/256 (active/max active/max total)
> > Reserved Conversations 1/1 (allocated/max allocated)
> > Available Bandwidth 6500 kilobits/sec
> >
> >
> >
> >
> >
> >
> >
> > -larry
> >
> >
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> >
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