From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Thu Feb 26 2004 - 22:05:21 GMT-3
Karim,
Assuming you mean a Frame Relay PVC, it depends if you are applying
the service-policy through Frame Relay Traffic Shaping. If you are applying
the service-policy to the interface itself, you should set the "bandwidth"
of the interface to 512. If you are running FRTS you should set the mincir
to 512000. When running FRTS the interface bandwidth value does not apply
to the MQC.
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: Karim [mailto:karim_ccie@hotmail.com]
> Sent: Thursday, February 26, 2004 5:46 PM
> To: Brian McGahan; 'Packet Man'; deivi78@hotmail.com; antonio.sanchez-
> monge@hp.com; msnyder@revolutioncomputer.com; ccielab@groupstudy.com
> Cc: alsontra@hotmail.com
> Subject: Re: MQC for bandwidth reservation (max-reserved-bandwidth 100)
>
> Hi Brian,
>
> Suppose that we have the following:
> - A customer pvc of 512K.
> - Port speed (interface bandwidth) of 2M.
> - And 64K is reserved for RTP.
> - 64K for LLQ.
>
> What will be the bandwidth value to be configured using the interface "
> bandwidth" command ??
> Would it be bandwidth 512, or bandwidth 512* 0.75, or something else
> (confused how RTP value will be involved).
>
> Regards,
> Karim.
>
>
>
> ----- Original Message -----
> From: "Brian McGahan" <bmcgahan@internetworkexpert.com>
> To: "'Packet Man'" <ccie2b@hotmail.com>; <deivi78@hotmail.com>;
> <antonio.sanchez-monge@hp.com>; <msnyder@revolutioncomputer.com>;
> <ccielab@groupstudy.com>
> Cc: <alsontra@hotmail.com>
> Sent: Friday, February 27, 2004 1:14 AM
> Subject: RE: MQC for bandwidth reservation (max-reserved-bandwidth 100)
>
>
> > The interface "bandwidth" command is what the available bandwidth
> > value is based off of.
> >
> > Available bandwidth = (interface_bandwidth * max-reserved-bandwidth/100)
> -
> > RTP - LLQ - RSVP
> >
> > The reason you would need to specify the bandwidth value is when the
> > provisioned rate of the interface does not match the interface bandwidth
> > command. For example, suppose you have a 1Mbps circuit you are leasing
> that
> > is dropped off as FastEthernet. Although the interface bandwidth is
> > 100Mbps, it would not make sense to calculate a QoS policy on 100Mbps,
> as
> > the upstream provider is policing at 1Mbps. Therefore the "bandwidth"
> value
> > should be adjusted to 1Mbps.
> >
> >
> > 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: Packet Man [mailto:ccie2b@hotmail.com]
> > > Sent: Thursday, February 26, 2004 2:31 PM
> > > To: deivi78@hotmail.com; bmcgahan@internetworkexpert.com;
> antonio.sanchez-
> > > monge@hp.com; msnyder@revolutioncomputer.com; ccielab@groupstudy.com
> > > Cc: alsontra@hotmail.com
> > > Subject: RE: MQC for bandwidth reservation (max-reserved-bandwidth
> 100)
> > >
> > > Hi,
> > >
> > > I'm not positive about this but my guess and what I've heard is that
> the
> > > bandwidth interface command's function is to let the routing protocol
> how
> > > much bandwidth is avaiable on a link which in turn some portocols use
> to
> > > compute cost or metric (OSPF or Eigrp).
> > >
> > > I don't know what bandwidth QoS uses or where it gets the bandwidth
> amount
> > > when it needs to compute a percentage. But, I do know that with some
> QoS
> > > features, various parameters should be based on the actual bandwidth
> > > rather
> > > than the policed or shaped bandwidth. I don't remember all the
> details,
> > > but
> > > I came across this info in the DQoS book.
> > >
> > > HTH
> > >
> > >
> > >
> > > >From: "David Hurtado" <deivi78@hotmail.com>
> > > >Reply-To: "David Hurtado" <deivi78@hotmail.com>
> > > >To: bmcgahan@internetworkexpert.com, antonio.sanchez-monge@hp.com,
> > > >msnyder@revolutioncomputer.com, ccielab@groupstudy.com
> > > >CC: alsontra@hotmail.com
> > > >Subject: RE: MQC for bandwidth reservation (max-reserved-bandwidth
> 100)
> > > >Date: Thu, 26 Feb 2004 19:52:55 +0000
> > > >
> > > >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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