RE: Remaining Percent??

From: stephen skinner (stephenski@gmail.com)
Date: Wed Aug 20 2008 - 05:50:16 ART

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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