From: David Hurtado (deivi78@hotmail.com)
Date: Thu Feb 26 2004 - 16:52:55 GMT-3
Hello everybody,
I stiil don't know why to use the "bandwidth" command in interface mode
when configuring CBWFQ if you are respecting the
maximum-reserve-bandwidth limitation:
For example:
class-map match-all ICMP
match access-group 101
policy-map ICMP_BW
class ICMP
bandwidth 128
interface fa1/0/0
bandwidth 1500 <-----------------------------When does this need to
be
specified?
service-policy output ICMP_BW
128 kbps is not over 75% of the FastEternet BW. Why do i have to
configure "bandwidth 1500"?
Could somebody explain it to me, please?
Thanks a lot
>From: "Brian McGahan" >Reply-To: "Brian McGahan" >To:
"'SANCHEZ-MONGE,ANTONIO (HP-France,ex2)'" , "'Michael Snyder'" ,
>CC: >Subject: RE: MQC for bandwidth reservation (max-reserved-bandwidth
100) >Date: Wed, 25 Feb 2004 14:24:08 -0600 > > As long as you take this
network traffic into account you are fine. >For example, on a GigE link,
it's a little ridiculous to say that 250Mbps of >traffic will be network
traffic. If you configure a class (i.e. not >class-default) which
matches your routing traffic and network traffic and >reserve the
appropriate bandwidth for it you are fine. > > Depending on the platform
the router may employ it's own queueing >strategy for essential network
control traffic. For more info see this cco >doc: >
>http://www.cisco.com/warp/public/105/rtgupdates.html > > >HTH, > >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 > > SANCHEZ-MONGE,ANTONIO (HP-France,ex2) > > Sent: Wednesday,
February 25, 2004 10:07 AM > > To: 'Michael Snyder';
ccielab@groupstudy.com > > Cc: alsontra@hotmail.com > > Subject: RE: MQC
for bandwidth reservation (max-reserved-bandwidth 100) > > > > Hi
Michael, > > > > -> Won't max-reserved-bandwidth 100 be a good default
command to use with > > MQC interfaces? > > > > Reserving 100% of the
total bandwidth may starve the router generated > > traffic and break
routing protocols and other essential management > > traffic. > > That's
why it is 75% by default and not 100%. > > > > Cheers, > > Ato. > > > >
-----Original Message----- > > From: Michael Snyder
[mailto:msnyder@revolutioncomputer.com] > > Sent: miircoles, 25 de
febrero de 2004 16:52 > > To: ccielab@groupstudy.com > > Cc:
alsontra@hotmail.com > > Subject: RE: MQC for bandwidth reservation
(max-reserved-bandwidth 100) > > > > > > Well, if you are using more that
75% of the bandwidth value (per the show > > int cmd) then you need to up
the upper limit. > > > > R8(config-if)#max-reserved-bandwidth 100 > > > >
Which brings up a question, > > > > Won't max-reserved-bandwidth 100 be a
good default command to use with MQC > > interfaces? > > > > > > > > > >
> > -----Original Message----- > > From: alsontra@hotmail.com
[mailto:alsontra@hotmail.com] > > Sent: Wednesday, February 25, 2004
11:08 AM > > To: SANCHEZ-MONGE,ANTONIO (HP-France,ex2);
ccielab@groupstudy.com > > Subject: Re: MQC for bandwidth reservation > >
> > Thank you Ato. > > > > My question was more in regards of whether or
not you have to specify the > > command when reserving bandwidth. I've
seen MQC configurations with and > > without the interface level
bandwidth command. I think your saying that I > > only need to specify
bandwidth if the reference bandwidth is different > > than > > the
interface bandwidth. > > > > > > Thanks > > Alsontra > > > > > > > > > >
----- Original Message ----- > > From: "SANCHEZ-MONGE,ANTONIO
(HP-France,ex2)" > > monge@hp.com> > > To: ; > > Sent: Wednesday,
February 25, 2004 2:29 AM > > Subject: RE: MQC for bandwidth reservation
> > > > > > Hi Alsontra, > > > > Both bandwidth commands have very
different meanings. > > > > Under the interface, it means the total
reference bandwidth. Used for QoS > > but also for routing protocols,
etc... Normally you need to change it in > > serial interfaces where the
real bandwidth is different from T1, etc... > > > > Under the class in a
policy map, it is the bandwidth you want to reserve > > for > > a
particular class. The total reserved bandwidth cannot exceed by default >
> 75% of the reference bandwidth. > > > > Cheers, > > Ato. > > > >
-----Original Message----- > > From: nobody@groupstudy.com
[mailto:nobody@groupstudy.com] On Behalf Of > > alsontra@hotmail.com > >
Sent: miircoles, 25 de febrero de 2004 11:01 > > To:
ccielab@groupstudy.com > > Subject: MQC for bandwidth reservation > > > >
> > When is the interface level bandwidth command used or needed with
MQC? > > > > For example: > > > > class-map match-all ICMP > > match
access-group 101 > > > > policy-map ICMP_BW > > class ICMP > >
bandwidth 128 > > > > interface fa1/0/0 >
> bandwidth 1500 <-----------------------------When does this need
to > > be > > specified? > > service-policy output ICMP_BW > > > > >
> > > If I don't specify this, what value dose the interface policy use?
The > > interface bandwidth rate? And if so why would I want to change
it? > > > > > > Alsontra > > > >
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