Subject: [ipcdn] Re: draft-ietf-ipcdn-docs-rfmibv2-04.txt

From: Minnie Lu <[email-masked]>
Date: Thu, 26 Sep 2002 17:35:37 -0700

Hi,

       docsIfCmtsChannelUtilization OBJECT-TYPE
 >              SYNTAX      Integer32 (0..100)
 >              UNITS       "percent"
 >              MAX-ACCESS  read-only
 >              STATUS      current
 >              DESCRIPTION
 >                  "The average utilization of the upstream channel expressed
 >                   as a percentage of minislots for which the CMTS received
 >                   an upstream burst from any CM, regardless of burst type
                   and measured in the docsIfCmtsChannelUtilizationInterval
                   time period."
 >              ::= { docsIfCmtsChannelUtilizationEntry 3 }
 >

This sounds like only for upstream.  If this object is also for downstream, 
I hope there will be some modification to this object's description.

Thanks!
Minnie

At 04:46 PM 09/26/2002 -0600, Greg White wrote:
> > Dave, Aviv,
> >
> > draft-ietf-ipcdn-docs-rfmibv2-04.txt expires in October and last I 
> heard, you were anticipating a draft-05.  I would encourage you (and the 
> community) to consider the following useful additions that have been 
> suggested by operators and CableLabs.  They are sketched out below.
> >
>-Greg
>
> > docsIfUpChannelPreEqEnable - This functionality is supported by all 1.1 
> CMTSs yet there is no MIB to control it.  This would be a useful control 
> for channels that must support DOCSIS 1.0 CMs.
> >
> >      docsIfUpChannelPreEqEnable OBJECT-TYPE
> >              SYNTAX      TruthValue
> >              MAX-ACCESS  read-create
> >              STATUS      current
> >              DESCRIPTION
> >                  "Used to enable or disable Pre-Equalization on the 
> upstream channel."
> >              REFERENCE
> >                  "Document [25] from References, Section 6.2.15.
> >              ::= { docsIfUpstreamChannelEntry 19 }
> >
> >
> > docsIfCmStatusEqualizationData - This object *should* be easily 
> reportable by the CM, and much more reliable than what is reported by the CMTS.
> >
> >      docsIfCmStatusEqualizationData OBJECT-TYPE
> >              SYNTAX      OCTET STRING
> >              MAX-ACCESS  read-only
> >              STATUS      current
> >              DESCRIPTION
> >                  "Pre-equalization data for this CM, formatted as 
> defined in the REFERENCE below."
> >              REFERENCE
> >                  "Document [25] from References, Figure 8-23."
> >              ::= { docsIfCmStatusEntry 17 }
> >
> >
> >
> > docsIfCmtsChannelUtilization - For capacity planning and incident 
> analysis, operators need a mechanism to evaluate the load on an upstream 
> channel. This is particularly true for provisioning of telephony and 
> other high-value QoS services. For physical channels that support mixed 
> operation (1.x / 2.0) there is no single channel capacity value that can 
> be weighed against the average data throughput to estimate load, 
> furthermore, for channels that are limited to 1.x-only or 2.0-only 
> operation, although an estimate can be made, it only includes MAC-layer 
> PDU data carried on the channel and ignores physical layer overhead as 
> well as MAC messaging overheads.  Unfortunately, since this object needs 
> to be defined per physical channel (ifType=129) rather than per logical 
> channel (ifType=205), it can't be added to the 
> docsIfUpstreamChannelTable, so a new table is needed.  Additionally, 
> statistics for downstream channels can easily be added to the new table.
> >
>              docsIfCmtsChannelUtilizationInterval OBJECT-TYPE
>
>                      SYNTAX      Integer32 (0..86400)
>                      UNITS       "seconds"
>                      MAX-ACCESS  read-write
>                      STATUS      current
>                      DESCRIPTION
>                         "The time interval over which channel utilization 
> is averaged.
>                         Setting the value to zero disables reporting of 
> utilization."
>                      DEFVAL { 300 }
>                      ::= {  docsIfCmtsObjects 8 }
>
>
> >      docsIfCmtsChannelUtilizationTable OBJECT-TYPE
> >              SYNTAX      SEQUENCE OF DocsIfCmtsChannelUtilizationEntry
> >              MAX-ACCESS  not-accessible
> >              STATUS      current
> >              DESCRIPTION
> >                  "This table reports statistics for attached upstream and
> >                   downstream channels."
> >              ::= { docsIfCmtsObjects 9 }
> >
> >      docsIfCmtsChannelUtilizationEntry OBJECT-TYPE
> >              SYNTAX      DocsIfCmtsChannelUtilizationEntry
> >              MAX-ACCESS  not-accessible
> >              STATUS      current
> >              DESCRIPTION
> >                  "Statistics for a single upstream channel. An entry
> >                   in this table exists for each ifEntry with an ifType of
> >                   docsCableDownstreamInterface (128) or
>                   docsCableUpstreamInterface (129)."
> >              INDEX { ifIndex }
> >              ::= { docsIfCmtsChannelUtilizationTable 1 }
> >
> >      DocsIfCmtsChannelUtilizationEntry ::= SEQUENCE {
>                  docsIfCmtsChannelId                     Integer32,
> >                  docsIfCmtsChannelIfType                    INTEGER -- 
> OR IANAifType,
> >                  docsIfCmtsChannelUtilization              Integer32
> >              }
> >
> >      docsIfCmtsChannelId OBJECT-TYPE
> >              SYNTAX      Integer32 (0..255)
> >              MAX-ACCESS  read-only
> >              STATUS      current
> >              DESCRIPTION
> >                 "The CMTS identification of the channel."
> >              ::= { docsIfCmtsChannelUtilizationEntry 1 }
> >
>      docsIfCmtsChannelIfType OBJECT-TYPE
>              SYNTAX      INTEGER  {
>                         docsCableDownstream(128),
>                         docsCableUpstream(129)
>                                }
>                         -- OR IANAifType
>              MAX-ACCESS  read-only
>              STATUS      current
>              DESCRIPTION
>                 "The CMTS interface type associated to the channel.
>               -- OR Add : Only values docsCableDownstream(128) and 
> docsCableUpstream(129) are valid
>                   "
>              ::= { docsIfCmtsChannelUtilizationEntry 2 }
> >
> >      docsIfCmtsChannelUtilization OBJECT-TYPE
> >              SYNTAX      Integer32 (0..100)
> >              UNITS       "percent"
> >              MAX-ACCESS  read-only
> >              STATUS      current
> >              DESCRIPTION
> >                  "The average utilization of the upstream channel expressed
> >                   as a percentage of minislots for which the CMTS received
> >                   an upstream burst from any CM, regardless of burst type
>                   and measured in the docsIfCmtsChannelUtilizationInterval
>                   time period."
> >              ::= { docsIfCmtsChannelUtilizationEntry 3 }
> >
> >

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