Fore-E3-MIB

All MIBs › Fore-E3-MIB

Organization: FORE

Last Updated: 1999-11-05

Category: ATM, Domain: WAN/TDM, Vendor: Fore Systems (ATM)

Description: Fore Systems E3 (34 Mbit/s) interface MIB providing performance monitoring and configuration for E3 trunk modules in ForeRunner ATM switches.

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What Is Fore-E3-MIB?

Fore-E3-MIB is a vendor-specific MIB from Fore Systems that provides configuration and performance monitoring for E3 (34 Mbit/s) trunk interface modules in ForeRunner ATM switches. Its e3ConfTable configures each port's e3LineType, e3LineCoding, e3SendCode/ReceiveCode, e3LoopbackConfig, e3TxClockSource, and Rx/Tx scrambling, with e3LineStatus and e3IdleUnassignedCells reflecting current line condition. Performance data is split across an e3FramingTable of physical-layer error counters (e3FramingLOSs, LCVs, FERRs, OOFs, FERFs, AISs, BIP8s, FEBEs), an e3PlcpTable of PLCP-sublayer counters (FERRs, LOFs, BIP8s, FEBEs, Yellows), and an e3AtmTable of ATM-cell-layer counters (e3AtmHCSs, RxCells, TxCells, LCDs). This layered structure lets an operator isolate whether a problem on an E3 trunk originates at the physical/line layer, the PLCP framing layer, or the ATM cell layer itself. The Fore-E3-MIB MIB is deployed on FORE Systems ATM switches carrying E3 trunk connections in carrier and enterprise ATM backbones.

IPNetwork Monitor allows you to monitor SNMP objects defined in Fore-E3-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

FORE Systems ForeRunner ATM switches with E3 trunk modules

Monitoring Examples

An operator polls e3FramingLOSs and e3LineStatus for a given e3ConfBoard/Module/Port trunk; a nonzero and climbing e3FramingLOSs count alongside e3LineStatus reporting a loss-of-signal condition would confirm a physical-layer fault on that E3 trunk rather than an ATM-layer cell-loss issue.

What Can Be Monitored

E3 line configuration (coding, clocking, loopback, scrambling)
physical-layer framing error counters (LOS/LCV/FERR/OOF/AIS/BIP8/FEBE)
PLCP sublayer error counters
ATM cell-layer counters (HCS errors, Rx/Tx cells, cell delineation loss)

Imported Objects

From Fore-Common-MIB

asx	OBJECT-IDENTITY

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
OBJECT-TYPE

How to Use in IPNetwork Monitor

Example using e3FramingLOSs OID:

Select an FORE Systems ATM switch 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 e3FramingLOSs 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 seconds in which Loss Of Signal (LOS) errors were detected by the E3 Receive Framer block. 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
foreE3	1.3.6.1.4.1.326.2.2.1.1.5			write something interesting here
e3ConfGroup	1.3.6.1.4.1.326.2.2.1.1.5.1
e3ConfTable	1.3.6.1.4.1.326.2.2.1.1.5.1.1		not-accessible	A table of E3 switch port configuration information.
e3ConfEntry	1.3.6.1.4.1.326.2.2.1.1.5.1.1.1		not-accessible	A table entry containing E3 configuration information for each port. Not all RFC1407 configuration table variables are included, and some are modified.
I32 e3ConfBoard	1.3.6.1.4.1.326.2.2.1.1.5.1.1.1.1	Integer32	read-only	The index of this port's switch board.
I32 e3ConfModule	1.3.6.1.4.1.326.2.2.1.1.5.1.1.1.2	Integer32	read-only	The network module of this port.
I32 e3ConfPort	1.3.6.1.4.1.326.2.2.1.1.5.1.1.1.3	Integer32	read-only	The number of this port.
INT e3LineType	1.3.6.1.4.1.326.2.2.1.1.5.1.1.1.4	INTEGER	read-write	This variable indicates the type of cell delineation being used. The e3Plcp(3) value indicates cell delineation according to CCITT G.751 using PLCP (Physical Layer Converhence Protocol) framing, while e3Framed(2) indicates HCS (Header Check Sequence) based framing. This variable is defined in the rfc1407 configuration table as dsx3LineType. According to RFC1407, the different values are: e3Framed(2) specification: CCITT G.751 e3Plcp(3) specification: ETSI T/NA(91)18.
INT e3LineCoding	1.3.6.1.4.1.326.2.2.1.1.5.1.1.1.5	INTEGER	read-only	This variable describes the variety of Zero Code suppression used on this interface, which in turn affects a number of its characteristics. e3HDB3 (1) refers to the use of specified pattern of normal bits and bipolar violations which are used to replaced sequences of zero bits of specified length. This variable is defined in the rfc1407 configuration table as dsx3LineCoding.
INT e3SendCode	1.3.6.1.4.1.326.2.2.1.1.5.1.1.1.6	INTEGER	read-only	This variable indicates what type of code is being sent across the E3/E3 interface by the device. The values mean: e3SendNoCode sending looped or normal data e3SendLineCode sending request for a line loopback e3SendPayloadCode sending a request for a payload loopback (i.e. all DS1/E1 in a E3/E3 frame) e3SendResetCode sending a loopback deactivation request e3SendDS1LoopCode requesting to loopback a particular DS1/E1 within a E3/E3 frame e3SendTestPattern sending a test pattern.
INT e3ReceiveCode	1.3.6.1.4.1.326.2.2.1.1.5.1.1.1.7	INTEGER	read-only	This variable indicates the type of code that was received across the E3/E3 interface. The values mean: e3ReceiveNoCode receiving looped or normal data e3ReceiveLineCode receiving request for a line loopback e3ReceivePayloadCode receiving a request for a payload loopback (i.e. all DS1/E1 in a E3/E3 frame) e3ReceiveResetCode receiving a loopback deactivation request e3ReceiveDS1LoopCode receiving a request to loopback a particular DS1/E1 within a E3/E3 frame e3ReceiveTestPattern receiving a test pattern.
INT e3LoopbackConfig	1.3.6.1.4.1.326.2.2.1.1.5.1.1.1.8	INTEGER	read-write	This variable represents the loopback configuration of the E3 interface. This variable is defined in the rfc1407 configuration table as dsx3LoopbackConfig, with slightly different values. e3NoLoop (1) means that the interface is not in a loopback state. e3CellLoop (2) means that cells that are processed by the receiving component are not written into the receive FIFO, but into the transmit FIFO for retransmission. e3PayloadLoop (3) means that the receive signal is looped back for retransmission after it has passed through the port's reframing function. e3DiagLoop (4) means that the transmit data stream is looped back to the receiver. e3LineLoop (5) means that the received data stream is reflected back to the sender. e3OtherLoop (6) means that the interface is in a loopback that is not defined here.
INT e3TxClockSource	1.3.6.1.4.1.326.2.2.1.1.5.1.1.1.9	INTEGER	read-write	The source of the transmit clock.
INT e3RxScrambling	1.3.6.1.4.1.326.2.2.1.1.5.1.1.1.10	INTEGER	read-write	This variable indicates whether the information is being descrambled on receiving. It should be set the same as the transmitting side.
INT e3TxScrambling	1.3.6.1.4.1.326.2.2.1.1.5.1.1.1.11	INTEGER	read-write	This variable indicates whether the information (48 octet payload) is being scrambled before transmitting. It should be set the same as the receiving side.
INT e3LineStatus	1.3.6.1.4.1.326.2.2.1.1.5.1.1.1.12	INTEGER	read-only	This variable indicates the Line Status of the interface. A similar object is defined in the rfc1407 configuration table as dsx3LineStatus (the e3RxFERF bit is not defined in rfc1407) . The variable contains loopback state information and failure state information. It is a bit map represented as a sum. The e3NoAlarm should be set if and only if no other flag is set. The various bit positions are: 1 e3NoAlarm 2 e3RxAIS Receiving AIS failure state 4 e3TxAIS Transmitting AIS (Not used) 8 e3PLCPLOF Receiving PLCP LOF failure state 16 e3LOS Receiving LOS failure state 32 e3LoopbackState Looping the received signal 64 e3HcsLCD Loss of Cell Delineation (Not used) 128 e3RxFERF Receiving Far End Receive Failure 256 e3OtherFailure any line status not defined here. 512 e3RxPLCPYellow Receiving PLCP Yellow 1024 e3TxPLCPYellow Transmitting PLCP Yellow 2048 e3RxLOF Receving LOF alarm. 4096 e3TxFERF Transmitting FERF 32768 e3RxLCD Receiving LCD failure indication
INT e3IdleUnassignedCells	1.3.6.1.4.1.326.2.2.1.1.5.1.1.1.13	INTEGER	read-write	This variable indicates the types of cells that should be sent in case there is no real data to send. According to the ATM Forum, Unassigned cells should be sent (octet 1-3 are 0's, octet 4 is 0000xxx0, where x is 'don't care'). According to the CCITT specifications, Idle cells should be sent (everything is '0' except for the CLP bit which is '1'). By default, unassigned cells are transmitted is case there is no data to send.
e3StatsGroup	1.3.6.1.4.1.326.2.2.1.1.5.2
e3FramingTable	1.3.6.1.4.1.326.2.2.1.1.5.2.1		not-accessible	A table of E3 framing statistics information.
e3FramingEntry	1.3.6.1.4.1.326.2.2.1.1.5.2.1.1		not-accessible	A table entry containing E3 framing statistics information.
I32 e3FramingBoard	1.3.6.1.4.1.326.2.2.1.1.5.2.1.1.1	Integer32	read-only	The index of this port's switch board.
I32 e3FramingModule	1.3.6.1.4.1.326.2.2.1.1.5.2.1.1.2	Integer32	read-only	The network module of this port.
I32 e3FramingPort	1.3.6.1.4.1.326.2.2.1.1.5.2.1.1.3	Integer32	read-only	The number of this port.
C32 e3FramingLOSsEx	1.3.6.1.4.1.326.2.2.1.1.5.2.1.1.4	Counter32	read-only	The number of seconds in which Loss Of Signal (LOS) errors were detected by the E3 Receive Framer block.
C32 e3FramingLCVs	1.3.6.1.4.1.326.2.2.1.1.5.2.1.1.5	Counter32	read-only	The number of Line Code Violations (LCV) that were detected by the E3 Receive Framer block.
C32 e3FramingFERRs	1.3.6.1.4.1.326.2.2.1.1.5.2.1.1.6	Counter32	read-only	Number of E3 framing error (FERR) events.
C32 e3FramingOOFs	1.3.6.1.4.1.326.2.2.1.1.5.2.1.1.7	Counter32	read-only	Number of seconds when E3 Out Of Frame (OOF) error events.
C32 e3FramingFERFs	1.3.6.1.4.1.326.2.2.1.1.5.2.1.1.8	Counter32	read-only	In a G.832 (e3LineType == e3Framed) configured port, this variable relects the number of seconds when Far End Receive Failures were experienced. In G.751 (e3LineType == e3Plcp) it is the number of Remote Alarm Indications.
C32 e3FramingAISs	1.3.6.1.4.1.326.2.2.1.1.5.2.1.1.9	Counter32	read-only	The number of seconds in which Alarm Indication Signals (AIS) were detected by the E3 Receive Framer block. AIS indicates that an upstream failure has been detected by the far end.
C32 e3FramingBIP8s	1.3.6.1.4.1.326.2.2.1.1.5.2.1.1.10	Counter32	read-only	The number of E3 G.832 BIP-8 errors. This counter is only valid in G.832.
C32 e3FramingFEBEs	1.3.6.1.4.1.326.2.2.1.1.5.2.1.1.11	Counter32	read-only	Number of E3 far end block error (FEBE) events.
e3PlcpTable	1.3.6.1.4.1.326.2.2.1.1.5.2.2		not-accessible	A table of E3 Physical Layer Convergence Protocol (PLCP) statistics information. These statistics are only valid when the G.751 (PLCP) based framing is being used by the E3. They are not meaningful when G.832 HCS-based framing is being used. Check e3LineType for the current framing option.
e3PlcpEntry	1.3.6.1.4.1.326.2.2.1.1.5.2.2.1		not-accessible	A table entry containing E3 PLCP statistics information.
I32 e3PlcpBoard	1.3.6.1.4.1.326.2.2.1.1.5.2.2.1.1	Integer32	read-only	The index of this port's switch board.
I32 e3PlcpModule	1.3.6.1.4.1.326.2.2.1.1.5.2.2.1.2	Integer32	read-only	The network module of this port.
I32 e3PlcpPort	1.3.6.1.4.1.326.2.2.1.1.5.2.2.1.3	Integer32	read-only	The number of this port.
C32 e3PlcpFERRs	1.3.6.1.4.1.326.2.2.1.1.5.2.2.1.4	Counter32	read-only	Number of Physical Layer Convergence Protocol (PLCP) octet error events.
C32 e3PlcpLOFs	1.3.6.1.4.1.326.2.2.1.1.5.2.2.1.5	Counter32	read-only	The number of seconds in which Loss Of Frame (LOF) errors were detected by the PLCP (Physical Layer Convergence Protocol) receiver. LOF is declared when an Out-Of-Frame state persists for more than 1ms. LOF is removed when in-frame state persists for more than 12ms.
C32 e3PlcpBIP8s	1.3.6.1.4.1.326.2.2.1.1.5.2.2.1.6	Counter32	read-only	Number of BIP-8 (Bit Interleaved Parity - 8) error events. The BIP-8 is calculated over the Path Overhead field and the associated ATM cell of the previous frame. A BIP-N is a method of error monitoring. An N bit code is generated by the transmitting equipment in such a manner that the first bit of the code provides even parity over the first bit of all N-bit sequences in the previous VT SPE, the second bit provides even parity over the second bits of all N-bit sequences within the specified portion, etc.
C32 e3PlcpFEBEs	1.3.6.1.4.1.326.2.2.1.1.5.2.2.1.7	Counter32	read-only	Number of ATM Far End Block Error (FEBE) events.
C32 e3PlcpYellows	1.3.6.1.4.1.326.2.2.1.1.5.2.2.1.8	Counter32	read-only	The number of seconds in which Yellow alarm errors were detected by the PLCP (Physical Layer Convergence Protocol) receiver. Yellow alarm is asserted when 10 consecutive yellow signal bits are set to logical 1. Yellow signals are used to alert upstream terminals of a downstream failure in order to initiate trunk conditioning on the failure circuit.
e3AtmTable	1.3.6.1.4.1.326.2.2.1.1.5.2.3		not-accessible	A table of E3 ATM statistics information.
e3AtmEntry	1.3.6.1.4.1.326.2.2.1.1.5.2.3.1		not-accessible	A table entry containing E3 ATM statistics information.
I32 e3AtmBoard	1.3.6.1.4.1.326.2.2.1.1.5.2.3.1.1	Integer32	read-only	The index of this port's switch board.
I32 e3AtmModule	1.3.6.1.4.1.326.2.2.1.1.5.2.3.1.2	Integer32	read-only	The network module of this port.
I32 e3AtmPort	1.3.6.1.4.1.326.2.2.1.1.5.2.3.1.3	Integer32	read-only	The number of this port.
C32 e3AtmHCSs	1.3.6.1.4.1.326.2.2.1.1.5.2.3.1.4	Counter32	read-only	Number of header check sequence (HCS) error events. The HCS is a CRC-8 calculation over the first 4 octets of the ATM cell header.
C32 e3AtmRxCells	1.3.6.1.4.1.326.2.2.1.1.5.2.3.1.5	Counter32	read-only	Number of ATM cells that were received.
C32 e3AtmTxCells	1.3.6.1.4.1.326.2.2.1.1.5.2.3.1.6	Counter32	read-only	Number of non-null ATM cells that were transmitted.
C32 e3AtmLCDs	1.3.6.1.4.1.326.2.2.1.1.5.2.3.1.7	Counter32	read-only	The number of seconds in which Loss of Cell Delineation (LCD) has occurred. An LCD defect is detected when an out of cell delination state has persisted for 4ms. An LCD defect is cleared when the sync state has been maintained for 4ms.

RFC description

Fore Systems E3 interface management MIB; manages E3 (34 Mbps) serial line interfaces and performance statistics on Fore ATM equipment.

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