From: john matijevic (matijevi@bellsouth.net)
Date: Sun Aug 29 2004 - 14:51:41 GMT-3
Hello Richard,
I tried to open up your link and I couldn't so I pasted the
documentation for others to view.
Reading from the DocCD, I believe it should be ubr+ as well. Based on
the following:
ubr
To configure unspecified bit rate (UBR) quality of service (QoS) and
specify the output peak cell rate (PCR) for an ATM permanent virtual
circuit (PVC), PVC range, switched virtual circuit (SVC), virtual
circuit (VC) class, or VC bundle member, use the ubr command in the
appropriate command mode. To remove the UBR parameter, use the no form
of this command.
ubr output-pcr [input-pcr]
no ubr output-pcr [input-pcr]
Syntax Description
output-pcr
The output PCR in kbps.
input-pcr
(Optional for SVCs only) The input peak cell rate (PCR) in kilobits per
second. If this value is omitted, the input-pcr will equal the
output-pcr.
ubr+
To configure unspecified bit rate (UBR) quality of service (QoS) and
specify the output peak cell rate and output minimum guaranteed cell
rate for an ATM permanent virtual circuit (PVC), PVC range, switched
virtual circuit (SVC), virtual circuit (VC) class, or VC bundle member,
use the ubr+ command in the appropriate command mode. To remove the UBR+
parameters, use the no form of this command.
ubr+ output-pcr output-mcr [input-pcr] [input-mcr]
no ubr+ output-pcr output-mcr [input-pcr] [input-mcr]
I tend to agree with you Richard, although I haven't personally tested
to verify that ubr cant be used with pvc, from the documentation. As far
as support I do have a support forum on my website. And I will do my
best to answer all the questions about the book on this board as well.
Sincerely,
John Matijevic, CCIE #13254, MCSE, CNE, CCEA
CEO
IgorTek Inc.
151 Crandon Blvd. #402
Key Biscayne, FL 33149
Hablo Espanol
305-321-6232
http://home.bellsouth.net/p/PWP-CCIE
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Richard Dumoulin
Sent: Sunday, August 29, 2004 12:55 PM
To: alsontra@hotmail.com; ccielab@groupstudy.com
Subject: RE : ATM ubr or ubr+
It's on the command ref
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/
wan_
r/wan_t1g.htm#wp1031941
--Richard
-----Message d'origine-----
De : alsontra@hotmail.com [mailto:alsontra@hotmail.com]
Envoyi : Sunday, August 29, 2004 8:46 PM
@ : Richard Dumoulin; ccielab@groupstudy.com
Objet : Re: ATM ubr or ubr+
RE : ATM ubr or ubr+Yes. I agree the solution should be "ubr+ 155000
512".
I think the author made a simple typo, as what's in the book is not a
valid
command.
Do you have a link for the following statement?
>"However, when you put "512" this is only needed in an SVC scenario as
per
the doc-cd."
ATM shaping is by far my weakest QOS area. Any additional information
would
be appreciated.
Thanks,
Alsontra
----- Original Message -----
From: Richard Dumoulin
To: alsontra@hotmail.com ; ccielab@groupstudy.com
Sent: Sunday, August 29, 2004 8:52 AM
Subject: RE : ATM ubr or ubr+
Alsontra, what I meant is that the author did configure the following:
ubr 155000 512
However, when you put "512" this is only needed in an SVC scenario as
per
the doc-cd.
So my question is: Should not "ubr+ 155000 512" be the solution ?
As here, a minimum of 512Kbps is guaranteed,
--Richard
note: now we see a diff between this book and the well known vendors. We
have no support ...
-----Message d'origine-----
De : alsontra@hotmail.com [mailto:alsontra@hotmail.com]
Envoyi : Sunday, August 29, 2004 7:32 PM
@ : ccielab@groupstudy.com; Richard Dumoulin
Objet : Re: ATM ubr or ubr+
Hi Richard,
I think you can applied a VC class to either a PVC or SVC.
<snip>
"A VC class is a set of reconfigured VC parameters that you configure
and
apply to a particular VC or ATM interface. You may apply a VC class to
an
ATM main interface, subinterface, PVC, or SVC. " -
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/
fwan
_c/wcfatm.htm#35055
</snip>
However, I am confused as to how the author configures both a PCR and
MCR
using only UBR. As the below excerpt shows, UBR has on a PCR parameter
and
UBR + has a PCR and MCR. As I understand the question, I think only UBR
shaping is required.
<snip>
Router(config-if-atm-vc)# abr output-pcr output-mcr Configures the
Available
Bit Rate (ABR). (ATM-CES port adapter and Multiport T1/E1 ATM Network
Module
only.)
Router(config-if-atm-vc)# ubr output-pcr Configures the Unspecified Bit
Rate
(UBR).
Router(config-if-atm-vc)# ubr+ output-pcr output-mcr Configures the UBR
and
a minimum guaranteed rate.
Router(config-if-atm-vc)# vbr-nrt output-pcr output-scr output-mbs
Configures the Variable Bit Rate-Non Real Time (VBR-NRT) QOS.
Router(config-if-atm-vc)# vbr-rt peak-rate average-rate burst Configures
the
real-time Variable Bit Rate (VBR). (Cisco MC3810 and Multiport T1/E1 ATM
Network Module only.)
</snip>
<http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr
/fwa
n_c/wcfatm.htm#26940>
Although I can't be certain, I think this book may contain several
errors
per section. An feed back on the above would be appreciated.
Thanks,
Alsontra
----- Original Message -----
From: "Richard Dumoulin" <Richard.Dumoulin@vanco.fr>
To: <ccielab@groupstudy.com>
Sent: Sunday, August 29, 2004 5:12 AM
Subject: ATM ubr or ubr+
> If we need to guarantee 512Kbps on an atm pvc I thought "ubr+ 155000
512"
> was needed under the pvc config. But on page 375 of Duggan's
CiscoPress
book
> he configures "ubr 155000 512". 512 on the ubr command only applies to
SVC's
> only when in this scenario a PVC is used.
> Has anyone noticed it ?
> Could anyone confirm that it is an error on the book ?
> --Richard
>
>
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