ARRIS-C3-NTP-MIB

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Organization: Arris International

Last Updated: 2004-03-30

Category: DOCSIS and Cable, Vendor: ARRIS

Description: ARRIS C3 CMTS NTP time synchronization server configuration and status management.

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What Is ARRIS-C3-NTP-MIB?

ARRIS-C3-NTP-MIB is a vendor-specific MIB from ARRIS for managing the Network Time Protocol (NTP) software running on the Arris C3 CMTS (Cable Modem Termination System) platform. It is expected to expose NTP server configuration (addresses, polling interval) and synchronization status objects, since its stated purpose is management of the NTP subsystem on this cable-broadband device. Its monitoring relevance is software/service status: NTP sync state and offset are used to confirm the CMTS clock remains accurate, which matters because time-stamping of DOCSIS events, logs, and billing records on a CMTS depends on correct system time. It is a supporting/utility MIB used alongside the broader Arris C3 CMTS MIB family that manages DOCSIS cable-plant functions. It is deployed on ARRIS C3 CMTS headend equipment in cable/broadband operator networks, making ARRIS-C3-NTP-MIB SNMP monitoring a standard part of confirming CMTS clock accuracy for DOCSIS event and billing timestamps.

IPNetwork Monitor allows you to monitor SNMP objects defined in ARRIS-C3-NTP-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

ARRIS C3 CMTS (cable modem termination system)

Monitoring Examples

No sample objects were provided for this module, so specific object names cannot be grounded from the data available; however, based on its stated purpose an administrator would typically poll NTP server reachability and clock-offset/sync-status objects to confirm the C3 CMTS is properly time-synchronized. A sync failure or growing clock offset would be flagged as a risk to accurate event and performance-log timestamps across the CMTS. This module would be checked whenever DOCSIS event logs show implausible or inconsistent timestamps.

Imported Objects

From ARRIS-MIB

cmtsC3

OBJECT-IDENTITY

From SNMPv2-SMI

Counter32
Integer32
IpAddress
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

RowStatus

How to Use in IPNetwork Monitor

Example using dcxNTPServerSuccess OID:

Select an ARRIS (Cadant) C3 CMT (Cable Modem Termination System) (legacy) 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 dcxNTPServerSuccess 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. The number of times the NTP server has been successfully polled. 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
cmtsC3NTPMIB	1.3.6.1.4.1.4115.1.4.3.7			This MIB manages the NTP software on the Arris CMTS C3
dcxNTPObjects	1.3.6.1.4.1.4115.1.4.3.7.1
dcxNTPServerTable	1.3.6.1.4.1.4115.1.4.3.7.1.1		not-accessible	This table contains a list of the NTP servers that the CMTS is configured to use. If the table is empty, then no NTP servers are specified, and the time will be read from the on-board RTC (Real Time Clock). Each NTP server in this table will be queried, but only the master NTP server will be used to update the system time.
dcxNTPServerEntry	1.3.6.1.4.1.4115.1.4.3.7.1.1.1		not-accessible	An entry describing an NTP server. Entries are ordered by dcxNTPServerIndex.
IP dcxNTPServerIp	1.3.6.1.4.1.4115.1.4.3.7.1.1.1.1	IpAddress	not-accessible	The IP address to which this entry's addressing information pertains.
I32 dcxNTPServerInterval	1.3.6.1.4.1.4115.1.4.3.7.1.1.1.2	Integer32	read-create	The interval for which the CMTS will wait before trying to connect to the NTP server (in seconds).
C32 dcxNTPServerSuccessEx	1.3.6.1.4.1.4115.1.4.3.7.1.1.1.3	Counter32	read-only	The number of times the NTP server has been successfully polled.
C32 dcxNTPServerAttempts	1.3.6.1.4.1.4115.1.4.3.7.1.1.1.4	Counter32	read-only	The number of times the NTP server has been polled.
I32 dcxNTPServerOffset	1.3.6.1.4.1.4115.1.4.3.7.1.1.1.5	Integer32	read-only	The offset (in seconds) from which the NTP server differs from the CMTS.
ROW dcxNTPServerStatus	1.3.6.1.4.1.4115.1.4.3.7.1.1.1.6	RowStatus	read-create	Controls and reflects the status of rows in this table. Rows in this table may be created by either the create-and-go or create-and-wait paradigms. There is no restriction on changing values in a row of this table while the row is active.
IP dcxNTPMasterServer	1.3.6.1.4.1.4115.1.4.3.7.1.2	IpAddress	read-write	This value contains the IP of the current master NTP server as specified in dcxNTPServerTable. An IP address of 0.0.0.0 will be displayed if the NTP master server is not in the list, or not configured.

RFC description

Vendor-private MIB for Arris C3 (CMS) cable systems NTP (Network Time Protocol) configuration; manages time synchronization settings.

Start monitoring ARRIS (Cadant) C3 CMTS (Cable Modem Termination System) (legacy) 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 ARRIS-C3-NTP-MIB

What Is ARRIS-C3-NTP-MIB?

Supported Devices

Monitoring Examples

This MIB depends on

Related MIBs

How to Use in IPNetwork Monitor

RFC description