From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Sat Mar 13 2004 - 18:26:42 GMT-3
Alsontra,
Here is the verbatim conversion, see if you can spot why the config
is as it is:
queue-list 1 protocol ip 1 tcp telnet
queue-list 1 protocol ip 2 tcp 53
queue-list 1 protocol ip 3 dlsw
queue-list 1 protocol ip 4 tcp www
queue list 1 queue 1 byte count 2000
queue-list 2 queue 1 byte count 1000
queue-list 3 queue 1 byte count 4000
queue-list 4 queue 1 byte count 1000
CONVERTS TO:
class-map DNS
match protocol dns
class-map DLSW
match protocol dlsw
class-map HTTP
match protocol http
!
policy-map CQ_2_CBWFQ
class DNS
queue-limit 20
bandwidth percent 13
class DLSW
queue-limit 20
bandwidth percent 50
class HTTP
queue-limit 20
bandwidth percent 13
class class-default
queue-limit 20
bandwidth percent 24
!
interface Serial0/0
bandwidth 128
max-reserved-bandwidth 100
service-policy output CQ_2_CBWFQ
See if you can spot the issue ;)
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 x 705
Outside US: 775-826-4344 x 705
> -----Original Message-----
> From: alsontra@hotmail.com [mailto:alsontra@hotmail.com]
> Sent: Saturday, March 13, 2004 5:00 PM
> To: Brian McGahan
> Subject: Re: converting custom queue to cbwfq
>
> Brian,
>
> I understand that you need the bandwidth of the interface or PVC's min_cir
> to convert CQ to CBWFQ. Based on this equations:
>
> (queue byte count / total byte count of all queues) * ((bandwidth capacity
> of the interface * 75%) - RTP - LLQ - RSVP_BANDWIDTH)
>
> (Speaking specifically about IOS 12.2T and your recent rehash of the
> subject): Can I infer the following:
>
> (2000/8000) * ((128000 * 75%) - 0 - 0 -0) = 25% of bandwidth
> (1000/8000) * ((128000 * 75%) - 0 - 0 -0) = 12.5 of bandwidth
> (4000/8000) * ((128000 * 75%) - 0 - 0 -0) = 50 of bandwidth
> (1000/8000) * ((128000 * 75%) - 0 - 0 -0) = 12.5 of bandwidth
>
> ________
>
> policy-map converttocbwfq
> class-map telnet
> bandwidth percent 25%
> class map tcpdns
> bandwidth percent 12.5%
> class map dlsw
> bandwidth percent 50%
> class map www
> bandwidth percent 12.5
>
> I do not understand the significance of the default queue and queue depth
> in
> this equation. What have I missed??
>
> Thanks for your time,
> Al
>
>
>
>
>
> ----- Original Message -----
> From: "Brian McGahan" <bmcgahan@internetworkexpert.com>
> To: "'Tom Wojahn'" <enthusiastictom@writeme.com>; "'ccie r&r oup'"
> <ccielab@groupstudy.com>
> Sent: Saturday, March 13, 2004 11:54 AM
> Subject: RE: converting custom queue to cbwfq
>
>
> > > In this case the bandwidth of 128 not valuable information
> >
> > Yes it is. The available bandwidth used as a reference by the MQC is
> based
> > on the configured bandwidth value of the interface.
> >
> > > I have a total of 8000 bytes on the custom queue
> >
> > Where is your default queue?
> >
> > What is your queue depth?
> >
> > What version are you configuring this on? There is a discrepancy of
> > absolute vs. relative reservations on a per version basis that was
> rehashed
> > just recently.
> >
> >
> >
> > Brian McGahan, CCIE #8593
> > bmcgahan@internetworkexpert.com
> >
> > Internetwork Expert, Inc.
> > http://www.InternetworkExpert.com
> > Toll Free: 877-224-8987 x 705
> > Outside US: 775-826-4344 x 705
> >
> >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of
> > > Tom Wojahn> > policy-map converttocbwfq
> > > class-map telnet
> > > bandwidth percent 2000/8000 or 25% to get to 75% 25/100 =
> > > x/75 19%
> > > class map tcpdns
> > > bandwidth percent 1000/8000 or 12.5% to get to 75 %
> 12.5/100
> > > = x/75 9.375% 9%
> > > class map dlsw
> > > bandwidth percent 4000/8000 or 50 % to get to 75%
> > > 50/100=x/75 38%
> > >
> > > class map www
> > > bandwidth percent 1000/8000 pr 12.5 % to get to 75% 12.5
> > > /13=x/75 9.375 9%
> > >
> > >
> > > total percent 19+9+38+9 = 75%
>
> > > Sent: Saturday, March 13, 2004 9:17 AM
> > > To: ccie r&r oup
> > > Subject: converting custom queue to cbwfq
> > >
> > > I have a scenario where you are given
> > > the reason I am asking is my answers did not match the answers given
> > >
> > > 128kb serial line
> > >
> > > A custom queue
> > >
> > > queue-list 1 protocol ip 1 tcp telnet
> > > queue-list 1 protocol ip 2 tcp 53
> > > queue-list 1 protocol ip 3 dlsw
> > > queue-list 1 protocol ip 4 tcp www
> > >
> > > queue list 1 queue 1 byte count 2000
> > > queue-list 2 queue 1 byte count 1000
> > > queue-list 3 queue 1 byte count 4000
> > > queue-list 4 queue 1 byte count 1000
> > >
> > > build a CBWFQ using percent not kb
> > >
> > > My theory and work
> > >
> > > In this case the bandwidth of 128 not valuable information
> > >
> > > I have a total of 8000 bytes on the custom queue
> > >
> > >
> > >
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