From: Richard Dumoulin (Richard.Dumoulin@vanco.fr)
Date: Sun Aug 29 2004 - 12:52:34 GMT-3
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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