BAS-SONET-MIB

All MIBs › BAS-SONET-MIB

Organization: Broadband Access Systems

Last Updated: 1998-10-07

Category: ATM, Network Interfaces

Description: Monitors SONET/SDH physical layer interface status and performance counters on BAS broadband platforms.

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What Is BAS-SONET-MIB?

BAS-SONET-MIB is a vendor MIB for Broadband Access System (BAS) platforms, defining configuration and status objects for SONET/SDH physical-layer interfaces used as transport uplinks on broadband access equipment. It exposes physical-layer path and line-level data including error counters, alarm/defect indicators, and received overhead byte values. Its core purpose is hardware status monitoring of the SONET transport interface: it reports path-level defects such as loss of pointer (PLOP), path alarm indication signal (PAIS) and remote defect indication (PRDI), plus B3 and G1 error counts that reveal transmission-quality degradation on the physical link. It builds on standard SONET/SDH terminology (path/line layer concepts akin to the IETF SONET-MIB) though implemented as a vendor-specific table structure. It is typically deployed on broadband access aggregation platforms carrying SONET/SDH uplinks to a metro or core transport network. Engineers can download the BAS-SONET-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in BAS-SONET-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

Broadband Access System (BAS) platform with SONET/SDH interfaces

Monitoring Examples

An operator polling basSonetPathTable/basSonetPathEntry would watch basSonetPathB3Err against basSonetPathB3Threshold to detect rising bit-error-rate conditions on a SONET path before service-affecting errors accumulate. A non-zero basSonetPathPlop or basSonetPathPrdi indicates loss of signal/pointer or a remote-detected defect requiring physical-layer troubleshooting. basSonetPathRxJ1, basSonetPathRxC2, and basSonetPathRxG1 can be read to confirm the received trace identifier, signal label, and path status byte match expected provisioning, while basSonetLineTable provides analogous line-layer alarm and error data.

What Can Be Monitored

path B3 error count
path alarm/defect indicators (PAIS, PRDI, PLOP)
received J1/C2/G1 overhead bytes
B3 error threshold
line-layer SONET status

Imported Objects

From BAS-MIB

basSonet

OBJECT-IDENTITY

From IF-MIB

ifIndex

OBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

TEXTUAL-CONVENTION
TimeStamp

How to Use in IPNetwork Monitor

Example using basSonetPathB3Err OID:

Select a Broadband Access Systems (BAS) CMT (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 basSonetPathB3Err 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 packets received on this link with B3 bit errors. 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 between polls, since a rising count of errors, failures, or discards often points to a real underlying problem. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
basSonetMib	1.3.6.1.4.1.3493.2.20.1			This MIB module defines the configuration and status MIB objects for a Broadband Access System SONET interface.
basSonetObjects	1.3.6.1.4.1.3493.2.20.1.1
basSonetPathTable	1.3.6.1.4.1.3493.2.20.1.1.1		not-accessible	A table containing SONET Path specific variables for this POS implementation.
basSonetPathEntry	1.3.6.1.4.1.3493.2.20.1.1.1.1		not-accessible	Management information about a particular POS Link.
C32 basSonetPathB3ErrEx	1.3.6.1.4.1.3493.2.20.1.1.1.1.1	Counter32	read-only	The number of packets received on this link with B3 bit errors. Bit Interleaved Parity 8 is calculated over all bits in the SPE of each frame.
C32 basSonetPathG1Err	1.3.6.1.4.1.3493.2.20.1.1.1.1.2	Counter32	read-only	The number of B3 errors that were detected by the remote terminal in its received signal.
C32 basSonetPathPais	1.3.6.1.4.1.3493.2.20.1.1.1.1.3	Counter32	read-only	The number of times a Path Alarm Indication Signal has been detected. A PAIS occurs if all the H1/H2 pointer bytes in the received SONET frame are 01.
C32 basSonetPathPrdi	1.3.6.1.4.1.3493.2.20.1.1.1.1.4	Counter32	read-only	The number of times a Path Remote Defect Indication has been detected. A PRDI occurs if bits 5,6 and 7 of the G1 byte received with the same value for 5 onsecutive frames.
C32 basSonetPathPlop	1.3.6.1.4.1.3493.2.20.1.1.1.1.5	Counter32	read-only	The number of times a Path Loss of Pointer has been detected. A PLOP occurs if all the H1/H2 pointer bytes in the received SONET frame are not all 01 indicating PRDI or the first pair equals 00 and all other pairs equaling 11 indicating normal operation.
I32 basSonetPathB3Threshold	1.3.6.1.4.1.3493.2.20.1.1.1.1.6	Integer32	read-write	The number of packets received with B3 errors hits this threshold issue an alarm.
I32 basSonetPathRxJ1	1.3.6.1.4.1.3493.2.20.1.1.1.1.7	Integer32	read-only	The first J1 byte received in last packet.
I32 basSonetPathRxC2	1.3.6.1.4.1.3493.2.20.1.1.1.1.8	Integer32	read-only	C2 byte received in last packet.
I32 basSonetPathRxG1	1.3.6.1.4.1.3493.2.20.1.1.1.1.9	Integer32	read-only	G1 byte received in last packet.
basSonetLineTable	1.3.6.1.4.1.3493.2.20.1.1.2		not-accessible	A table containing SONET Line specific variables for this POS implementation.
basSonetLineEntry	1.3.6.1.4.1.3493.2.20.1.1.2.1		not-accessible	Management information about a particular POS Link.
C32 basSonetLineTxErr	1.3.6.1.4.1.3493.2.20.1.1.2.1.1	Counter32	read-only	The sum of all transmit errors that caused the packet to not be transmitted. These errors consist of tx fifo error, link layer errors, minimum packet size violations, maximum packet size violations and tx parity errors.
C32 basSonetLineB1Err	1.3.6.1.4.1.3493.2.20.1.1.2.1.2	Counter32	read-only	The number of packets received on this link with B1 bit errors. Bit Interleaved Parity 8 is calculated over all bytes of each frame.
C32 basSonetLineB2Err	1.3.6.1.4.1.3493.2.20.1.1.2.1.3	Counter32	read-only	The number of packets received on this link with B2 bit errors. Bit Interleaved Parity 8 is calculated over all bytes of each frame except for the first three rows of the TOH
C32 basSonetLineM1Err	1.3.6.1.4.1.3493.2.20.1.1.2.1.4	Counter32	read-only	The number of B2 errors that were detected by the remote terminal in its received signal.
C32 basSonetLineRxFifoOverflow	1.3.6.1.4.1.3493.2.20.1.1.2.1.5	Counter32	read-only	The number of packets received on this link with an error detected in the receive fifo.
C32 basSonetLineRxAbort	1.3.6.1.4.1.3493.2.20.1.1.2.1.6	Counter32	read-only	The number of packets received on this link in which the abort sequence is detected.
C32 basSonetLineRxRunts	1.3.6.1.4.1.3493.2.20.1.1.2.1.7	Counter32	read-only	The number of packets received on this link which are smaller than the minimum packet size.
C32 basSonetLineLoc	1.3.6.1.4.1.3493.2.20.1.1.2.1.8	Counter32	read-only	The number of times a loss of clock has been detected. LOC occurs if no transitions are detected on the receive SONET clock for 16 periods of the transmit clock..
C32 basSonetLineLof	1.3.6.1.4.1.3493.2.20.1.1.2.1.9	Counter32	read-only	The number of times a loss of frame has been detected. LOF occurs if RX_OOF (out-of-frame) is active continuously for 24 consecutive frames (3 ms).
C32 basSonetLineLos	1.3.6.1.4.1.3493.2.20.1.1.2.1.10	Counter32	read-only	The number of times a loss of signal has been detected. A LOS indicates to the framer that there is no signal present from the optical receiver.
C32 basSonetLineLais	1.3.6.1.4.1.3493.2.20.1.1.2.1.11	Counter32	read-only	The number of times a Line Alarm Indication Signal has been detected. A LAIS occurs if the 3 LSBs of K2 are received as '111' for 5 consecutive frames
C32 basSonetLineLrdi	1.3.6.1.4.1.3493.2.20.1.1.2.1.12	Counter32	read-only	The number of times a Line Remote Defect Indication has been detected. A LRDI occurs if the 3 LSBs of K2 are not received as '110' for 5 consecutive frames.
I32 basSonetLineB1Threshold	1.3.6.1.4.1.3493.2.20.1.1.2.1.13	Integer32	read-write	The number of packets received with B1 errors hits this threshold issue an alarm.
I32 basSonetLineB2Threshold	1.3.6.1.4.1.3493.2.20.1.1.2.1.14	Integer32	read-write	The number of packets received with B2 errors hits this threshold issue an alarm.
I32 basSonetLineSFThreshold	1.3.6.1.4.1.3493.2.20.1.1.2.1.15	Integer32	read-write	The number of packets received with B2 errors hits this threshold issue a signal fail alarm.
I32 basSonetLineSDThreshold	1.3.6.1.4.1.3493.2.20.1.1.2.1.16	Integer32	read-write	The number of packets received with B2 errors hits this threshold issue a signal degrade alarm.
TIM basSonetLineLastCleared	1.3.6.1.4.1.3493.2.20.1.1.2.1.17	TimeStamp	read-only	The value of sysUpTime when these Counter32s were last cleared.
I32 basSonetLineRxK1	1.3.6.1.4.1.3493.2.20.1.1.2.1.18	Integer32	read-only	K1 byte received in last packet.
I32 basSonetLineRxK2	1.3.6.1.4.1.3493.2.20.1.1.2.1.19	Integer32	read-only	K2 byte received in last packet.
C32 basSonetLineRxGiants	1.3.6.1.4.1.3493.2.20.1.1.2.1.20	Counter32	read-only	The number of packets received on this link which are larger than the maximum packet size.

RFC description

Broadband Access Systems SONET interface MIB for monitoring SONET path errors, signals, and POS interface statistics.

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Download BAS-SONET-MIB