RDN-CABLE-TRAFFIC-MANAGEMENT-MIB

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Organization: Motorola

Last Updated: 2008-09-16

Category: DOCSIS and Cable

Description: Manages cable traffic policy enforcement, subscriber bandwidth control, and service flow management on Motorola BSR CMTS.

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What Is RDN-CABLE-TRAFFIC-MANAGEMENT-MIB?

RDN-CABLE-TRAFFIC-MANAGEMENT-MIB is a Motorola enterprise MIB for Cable Modem Termination System (CMTS) platforms (BSR series) that manages cable traffic policy enforcement, including subscriber bandwidth control and service flow traffic shaping. It exposes summary and enforced-policy statistics tables along with global scalar settings governing how traffic policies are applied across the cable plant. This supports monitoring of software-driven service enforcement rather than raw hardware sensors: operators can see how many subscribers or flows are currently subject to traffic policy enforcement and whether policy enforcement counts spike unexpectedly, indicating congestion or a misbehaving policy rule. It is a Motorola-specific MIB built for DOCSIS cable access networks, complementing rather than replacing standard DOCSIS/cable MIBs for CMTS management. It is deployed on Motorola BSR CMTS platforms used by cable operators to enforce bandwidth policies on residential/business broadband subscribers. Network engineers evaluating or troubleshooting this functionality can download the RDN-CABLE-TRAFFIC-MANAGEMENT-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in RDN-CABLE-TRAFFIC-MANAGEMENT-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

Motorola BSR CMTS (Cable Modem Termination System)

Monitoring Examples

An operator polls rdnCtmSummaryTable to get an aggregate view of traffic-policy enforcement activity across the CMTS, and checks rdnCtmEnforcedTable to identify which specific subscriber flows currently have an enforced (throttled) policy applied. A sudden rise in enforced-policy entries alongside rdnCtmScalar settings can indicate a traffic congestion event or a bandwidth policy that is too aggressive for current subscriber demand.

What Can Be Monitored

traffic policy enforcement summary
enforced (throttled) subscriber flows
cable traffic policy scalar settings

Imported Objects

From IF-MIB

InterfaceIndex

From RDN-MIB

riverdelta

MODULE-IDENTITY

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE

From SNMPv2-TC

DateAndTime
DisplayString
MacAddress
TruthValue

How to Use in IPNetwork Monitor

Example using rdnCtmEnforcedMonitoredCount OID:

Select a Motorola BSR CMT (subscriber bandwidth/traffic policy enforcement) as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type rdnCtmEnforcedMonitoredCount into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. It reports the for 'continuous' monitored policies, represents the excess traffic beyond the enforce rate for this service flow. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
rdnCableTrafficManagementMib	1.3.6.1.4.1.4981.10			MIB module for Motorola Cable Traffic Policy. Copyright (C) 2008 by Motorola, Inc. All rights reserved.
rdnCtmScalar	1.3.6.1.4.1.4981.10.1
INT rdnCtmEnforcedClear	1.3.6.1.4.1.4981.10.1.1	INTEGER	read-write	Clears all monitored traffic counts thereby ending any enforcement in effect.
DAT rdnCtmEnforcedSince	1.3.6.1.4.1.4981.10.1.2	DateAndTime	read-only	Time at which cable traffic enforcement history was last cleared via CLI command, 'clear cable traffic history' or by writing a '1' to the object rdnCtmClearHistory.
INT rdnCtmClearHistory	1.3.6.1.4.1.4981.10.1.3	INTEGER	read-write	This object is always read as the value noAction(1). Writing the value clear(2) clears the history of last enforcement for each monitored service flow as reported in the object rdnCtmEnforcedLast and the 'LastEnforced' column of the output of the CLI command 'show cable subscriber-usage'.
rdnCtmSummaryTable	1.3.6.1.4.1.4981.10.2		not-accessible	Summarizes the operation of the cable traffic management feature. Each entry summarizes the operation of a single cable traffic policy on a single cable interface.
rdnCtmSummaryTableEntry	1.3.6.1.4.1.4981.10.2.1		not-accessible	The entry indexes are ifindex, direction, and cable traffic policy name. The direction is included as an index in order to sort the entries by direction.
NUM rdnCtmSummaryIfIndex	1.3.6.1.4.1.4981.10.2.1.1	InterfaceIndex	not-accessible	MAC Domain ifIndex.
INT rdnCtmSummaryDirection	1.3.6.1.4.1.4981.10.2.1.2	INTEGER	not-accessible	Traffic direction.
STR rdnCtmSummaryTrafficPolicy	1.3.6.1.4.1.4981.10.2.1.3	DisplayString	not-accessible	Name of the cable traffic policy.
I32 rdnCtmSummaryMonitoredCount	1.3.6.1.4.1.4981.10.2.1.4	Integer32	read-only	The sum of the monitored counts for all flows controlled by the cable traffic policy on the interface of this entry.
I32 rdnCtmSummaryTotalFlows	1.3.6.1.4.1.4981.10.2.1.5	Integer32	read-only	Total number of service flows controlled by the cable traffic policy on a cable interface (i.e. MAC domain).
I32 rdnCtmSummaryEnforcedFlows	1.3.6.1.4.1.4981.10.2.1.6	Integer32	read-only	Number of service flows currently exceeding their credit limit while controlled by the cable traffic policy on a cable interface (i.e. MAC domain).
rdnCtmEnforcedTable	1.3.6.1.4.1.4981.10.3		not-accessible	Table of service flows which have exceeded their credit limit and been enforced since the last clearing of cable traffic history. Cable traffic history is cleared with the CLI command 'clear cable traffic history' or by writing clear(1) to the object rdnCtmClearHistory. This table does not include entries for service flows with rate limits reduced due to bidirectional enforcement.
rdnCtmEnforcedTableEntry	1.3.6.1.4.1.4981.10.3.1		not-accessible	Each entry corresponds to a single service flow which started enforcement due to exceeding its credit limit since the last clearing of cable traffic history.
NUM rdnCtmEnforcedIfIndex	1.3.6.1.4.1.4981.10.3.1.1	InterfaceIndex	not-accessible	The mac domain interface index that the service flow is admitted to.
INT rdnCtmEnforcedDirection	1.3.6.1.4.1.4981.10.3.1.2	INTEGER	not-accessible	Direction of service flow.
I32 rdnCtmEnforcedServiceFlowId	1.3.6.1.4.1.4981.10.3.1.3	Integer32	not-accessible	The service flow ID.
MAC rdnCtmEnforcedCmMacAddr	1.3.6.1.4.1.4981.10.3.1.4	MacAddress	read-only	The mac Address of modem to which service flow belongs.
STR rdnCtmEnforcedTrafficPolicy	1.3.6.1.4.1.4981.10.3.1.5	DisplayString	read-only	The cable traffic policy which service flow is controlled by.
C32 rdnCtmEnforcedMonitoredCountEx	1.3.6.1.4.1.4981.10.3.1.6	Counter32	read-only	For 'continuous' monitored policies, represents the excess traffic beyond the enforce rate for this service flow. For 'peak-interval' monitoring, represents the total traffic transferred in the curent or last completed peak-time interval. Units are kilobytes, with 1024 bytes per kilobyte.
OCT rdnCtmEnforcedLast	1.3.6.1.4.1.4981.10.3.1.7	OCTET STRING	read-only	The amount of time since the service flow was last enforced. This field will be empty if it has not been enforced since the last time cable traffic history was cleared or since system start.
OCT rdnCtmEnforcedRemain	1.3.6.1.4.1.4981.10.3.1.8	OCTET STRING	read-only	The minimum amount of time a service flow is to remain under enforcement.
INT rdnCtmEnforcedLimitRate	1.3.6.1.4.1.4981.10.3.1.9	INTEGER	read-only	The current scheduler limit rate for the service flow in kbps. This is either the configured maximum rate or the policy's enforce rate if flow is currently under enforcement. Units are kilobits per second, with 1000 bits per kilobit.
INT rdnCtmEnforcedReason	1.3.6.1.4.1.4981.10.3.1.10	INTEGER	read-only	Indicates if the service flow's rate limit is currently reduced due to the cable traffic management feature. The value of configured(1) indicates the service flow is not reduced by the feature, i.e. it is limited to its configured maximum rate. The value of bidirectional(2) is reserved for future use. The rdnCtmEnforcedTable does not include flows reduced due to bidirectional enforcement. The value of enforced(3) indicates a service flow is currently enforced, i.e. it has over-consumed its monitored traffic credit limit.
T/F rdnCtmEnforcedMonitored	1.3.6.1.4.1.4981.10.3.1.11	TruthValue	read-only	Indiacates if the service flow is currently being monitored, either true(1) or false(2).

RFC description

Cable Traffic Management policies for Motorola BSR CMTS service flow enforcement.

Start monitoring Motorola BSR CMTS (subscriber bandwidth/traffic policy enforcement) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download RDN-CABLE-TRAFFIC-MANAGEMENT-MIB