LINKSWITCH-MIB

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Category: Switch Management

Description: Manages LinkSwitch network switching device configuration and port statistics.

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What Is LINKSWITCH-MIB?

LINKSWITCH-MIB is a vendor-specific enterprise MIB for the LinkSwitch line of Ethernet/source-routing switching devices, covering switch-wide configuration and diagnostic status. It exposes categories of data including traffic filtering controls (source-route, segment, and multicast filters), address table aging, loop-detection behavior, and device self-test/status-indicator objects. It is explicitly useful for monitoring hardware and software status: lsProdVerSW and lsProdVerHW report the running software and hardware revision, lsLEDstate reflects the switch's front-panel status indicator, and lsTestResult exposes the outcome of the device's self-test diagnostics. It is a standalone enterprise MIB with no evident dependency on another vendor's MIB beyond standard SNMPv2/Ethernet conventions. It would have been deployed in legacy enterprise LAN environments using LinkSwitch bridging/switching hardware for segment interconnection, and administrators researching this legacy platform today can still download the LINKSWITCH-MIB file to load it into a MIB browser for reference.

IPNetwork Monitor allows you to monitor SNMP objects defined in LINKSWITCH-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

LinkSwitch enterprise Ethernet/bridging switch

Monitoring Examples

An admin polls lsProdVerSW and lsProdVerHW to confirm firmware/hardware revision during an inventory audit, and checks lsTestResult alongside lsLEDstate to see whether the switch passed its power-on self-test and what its status LED currently shows. lsLoopDetectAction and lsAddressAgingTimer reveal how the switch reacts to a detected network loop and how quickly it ages out stale MAC address table entries, so a stuck loop-detect action combined with an unusually low aging timer could explain intermittent connectivity flaps on the segment.

What Can Be Monitored

software/hardware version
self-test result
status LED state
loop detection action
address aging timer
multicast/segment/source-route filter status

Imported Objects

From A3Com-products-MIB

a3Com

OBJECT-IDENTITY

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

Counter

From RFC1213-MIB

DisplayString
PhysAddress

OIDs

OID symbolic	OID numeric	Type	Access	Description
linkSwitch	1.3.6.1.4.1.43.17
INT lsAction	1.3.6.1.4.1.43.17.11	INTEGER	read-write	Value when read will be other. Writing a value to this object will result in the associated action taking place. Note that it is possible to disconnect the management station from the LinkSwitch by issuing the disconnect-FDDI or disconnect-Eth actions, depending of course where the management station is connected to the LinkSwitch. For those actions which are tests, the result is in lsTestResult. If the action is disconnect-FDDI, the FDDI ring will function internally for inter-segment frames.
CTR lsAddressAgingTimer	1.3.6.1.4.1.43.17.5	Counter	read-write	A count of the seconds that will elapse before the Address Filter contents are 'aged' to remove entries which are not active. Default is 1800, or 30 minutes. Write 0 to stop aging process from occuring. DURABLE.
OCT lsBusCts	1.3.6.1.4.1.43.17.16	OCTET STRING	read-only	A binary structure which contains the FtoE and EtoF counters for all ls ports. Actual layout available on request.
INT lsEportAction	1.3.6.1.4.1.43.17.13.1.14	INTEGER	read-write	Value when read will be other. Writing a value to this object will result in the associated action taking place. For those actions which are tests, the result is in lsEportTestResult.
INT lsEportActivate	1.3.6.1.4.1.43.17.13.1.3	INTEGER	read-write	When true, port is shutdown but not reset, so counters will maintain values at time of deactivation. Further functionality controlled by ifOperStatus. Default is true.
INT lsEportEnable	1.3.6.1.4.1.43.17.13.1.2	INTEGER	read-write	When false, port is in reset state, so no port (Ethernet) traffic will go through. When enabled, functionality is further controlled by lsEportActivate and ifOperStatus. Default is true. DURABLE.
lsEportEntry	1.3.6.1.4.1.43.17.13.1		not-accessible
CTR lsEportEtoFBusErrorCts	1.3.6.1.4.1.43.17.13.1.22	Counter	read-only	A count of frames that encountered a Parity or FIFO Error as they went from Ethernet to the FDDI.
CTR lsEportEtoFByteCts	1.3.6.1.4.1.43.17.13.1.16	Counter	read-only	A count of bytes that were forwarded from the Ethernet MAC to the Address Filter. The count per packet includes the byte count indicated by the Ethernet MAC (without FCS), plus a number of overhead bytes used internally.
CTR lsEportEtoFDropPktCts	1.3.6.1.4.1.43.17.13.1.20	Counter	read-only	A count of frames that were dropped before reaching the FDDI MAC. Include in this value are frames encountering resource constraints, as well as frames which did not need to be forwarded onto the FDDI (i.e., local intra-segment traffic).
CTR lsEportEtoFPacketCts	1.3.6.1.4.1.43.17.13.1.18	Counter	read-only	A count of frames that were forwarded trom the Ethernet MAC to the Address Filter. The count is the number of frames received without error by the Ethernet MAC. Packets may be not-forwarded by the Address Filter and some may encounter error conditions, so it is necessary to subtract the value of lslEportEtoFDropPktCts for the true number of frames.
CTR lsEportFtoEBusErrorCts	1.3.6.1.4.1.43.17.13.1.21	Counter	read-only	A count of frames that encountered a Parity or FIFO Error as they went from FDDI to the Ethernet.
CTR lsEportFtoEByteCts	1.3.6.1.4.1.43.17.13.1.15	Counter	read-only	A count of bytes that were forwarded from the FDDI MAC to the Ethernet through the Address Filter. The count per frame includes the packet's bytes as received by the FDDI MAC (FCS removed), plus a number of overhead bytes used internally.
CTR lsEportFtoEDropPktCts	1.3.6.1.4.1.43.17.13.1.19	Counter	read-only	A count of frames that were dropped as they went from the FDDI to the Ethernet through the Address Filter. Frames may be dropped due to resource constraints.
CTR lsEportFtoEPacketCts	1.3.6.1.4.1.43.17.13.1.17	Counter	read-only	A count of frames that were forwarded from the FDDI MAC to the Ethernet MAC through the Address Filter. The count is the number of frames that the Ethernet MAC was able to transmit.
INT lsEportIndex	1.3.6.1.4.1.43.17.13.1.1	INTEGER	read-only	The index of this table entry.
INT lsEportLinkState	1.3.6.1.4.1.43.17.13.1.4	INTEGER	read-only	Reports status of Link, as affected by lsEportEnable, lsEportActive, lsEportForwarding, and ifOperStatus.
INT lsEportLongPktsEnable	1.3.6.1.4.1.43.17.13.1.7	INTEGER	read-write	When true, frames with lengths longer than Ethernet maximum will be allowed to go from FDDI to Ethernet and Ethernet to FDDI. Default is false. DURABLE.
INT lsEportMCastBurstLimit	1.3.6.1.4.1.43.17.13.1.10	INTEGER	read-write	This specifies the maximum number of multicasts that can be forwarded from FDDI to Ethernet port in a 'burst' before the lsEportBCastRate limit causes frames to be discarded Must also set lsEportMCastBurstLimit to non-zero value. If this to zero, all multicasts are discarded. DURABLE.
INT lsEportMCastFilterEnable	1.3.6.1.4.1.43.17.13.1.8	INTEGER	read-write	When true, filtering will occur based on the values of lsEportMCastRate and lsEportMCastBurstLimit. If false, there is no port-level filtering performed on multicasts. Default is false. DURABLE.
INT lsEportMCastRate	1.3.6.1.4.1.43.17.13.1.9	INTEGER	read-write	The rate in frames/second that multicasts will not be allowed to exceed, when lsEportBcastFilterEnable is true. Must also set lsEportMCastBurstLimit to non-zero value. DURABLE.
STR lsEportName	1.3.6.1.4.1.43.17.13.1.5	DisplayString	read-write	Abstract name for port. DURABLE.
INT lsEportNumber	1.3.6.1.4.1.43.17.12	INTEGER	read-only	A count of the Ethernet Ports supported by this system.
CTR lsEportRAlignmentCts	1.3.6.1.4.1.43.17.13.1.36	Counter	read-only	A count of frames received on a particular interface that are not an integral number of octets in length and do not pass the FCS check. The count represented by an instance of this object is incremented when the 'alignment error' status is returned by the MAC service to the LLC (or other MAC user). Received frames for which multiple error conditions obtain are, according to the conventions of IEEE 802.3 Layer Management, counted exclusively according to the error status presented to the LLC.
CTR lsEportRBCastCts	1.3.6.1.4.1.43.17.13.1.34	Counter	read-only	A count of frames received with a broadcast address. Does not include frames received with a multicast address.
CTR lsEportRDirectedCts	1.3.6.1.4.1.43.17.13.1.35	Counter	read-only	A count of frames received that were not addressed to either the multicast or the broadcast address.
CTR lsEportRFCSErrorCts	1.3.6.1.4.1.43.17.13.1.38	Counter	read-only	A count of frames received on a particular interface that are an integral number of octets in length but do not pass the FCS check. The count represented by an instance of this object is incremented when the frameCheckError status is returned by the MAC service to the LLC (or other MAC user). Received frames for which multiple error conditions obtain are, according to the conventions of IEEE 802.3 Layer Management, counted exclusively according to the error status presented to the LLC.
CTR lsEportRMCastCts	1.3.6.1.4.1.43.17.13.1.33	Counter	read-only	A count of frames received with a multicast address. Does not include frames received with a broadcast address.
CTR lsEportROverrunCts	1.3.6.1.4.1.43.17.13.1.39	Counter	read-only	The number of frames which could not be stored by the Ethernet MAC due to internal resource constraints.
CTR lsEportRTooLongCts	1.3.6.1.4.1.43.17.13.1.37	Counter	read-only	A count of frames which were received and also exceeded the maximum frame size.
CTR lsEportSecsSinceLastClear	1.3.6.1.4.1.43.17.13.1.12	Counter	read-only	A count of seconds since last cleared counters for this port. Use lsEportAction to clear the counters.
INT lsEportSQETestEnable	1.3.6.1.4.1.43.17.13.1.6	INTEGER	read-write	When true, SQE test (heartbeat) will occur after each frame transmitted by Ethernet MAC. Need not be disabled for those ports which are connected to a repeater because Eth ports have a MAC. Default is true. DURABLE.
INT lsEportStationsNumber	1.3.6.1.4.1.43.17.13.1.11	INTEGER	read-only	A count of stations whose Physical Address has been detected in the Source Address field of a frame which was transmitted by a station connected to this port.
lsEportTable	1.3.6.1.4.1.43.17.13		not-accessible
INT lsEportTestResult	1.3.6.1.4.1.43.17.13.1.13	INTEGER	read-only	When a test is initiated via lsEportAction, the result of the test is stored in this variable when the test has completed or failed. The value varies by test, is set to one (other) at the start of the test.
CTR lsEportXBCastCts	1.3.6.1.4.1.43.17.13.1.24	Counter	read-only	A count of frames transmitted to a broadcast address. Does not include frames sent to the multicast address.
CTR lsEportXCollAbortCts	1.3.6.1.4.1.43.17.13.1.28	Counter	read-only	A count of frames for which transmission fails due to excessive collisions.
CTR lsEportXCSErrCts	1.3.6.1.4.1.43.17.13.1.29	Counter	read-only	A count of times that the carrier sense condition was lost or never asserted when attempting to transmit a frame.
CTR lsEportXDeferredCts	1.3.6.1.4.1.43.17.13.1.26	Counter	read-only	A count of frames for which the first transmission attempt is delayed because the medium is busy. The count does not include frames involved in collisions.
CTR lsEportXDirectedCts	1.3.6.1.4.1.43.17.13.1.25	Counter	read-only	A count of frames transmitted that were not addressed to either the multicast or the broadcast address.
CTR lsEportXExcessDeferCts	1.3.6.1.4.1.43.17.13.1.30	Counter	read-only	A count of times that the deferral time was excessive.
CTR lsEportXLateCollCts	1.3.6.1.4.1.43.17.13.1.27	Counter	read-only	A count of times that a collision is detected later 512 bit-times into the transmission of a packet. A late collision is also considered as a generic collision for purposes of other collision-related counters.
CTR lsEportXMCastCts	1.3.6.1.4.1.43.17.13.1.23	Counter	read-only	A count of frames transmitted to a multicast address. Does not include frames sent to the broadcast address.
CTR lsEportXSQETestFailCts	1.3.6.1.4.1.43.17.13.1.32	Counter	read-only	A count of times that the SQE TEST ERROR message is generated by the PLS sublayer for a particular interface. The SQE TEST ERROR message is defined in section 7.2.2.2.4 of ANSI/IEEE 802.3-1985 and its generation is described in section 7.2.4.6 of the same document.
CTR lsEportXUnderrunCts	1.3.6.1.4.1.43.17.13.1.31	Counter	read-only	A count of times that an underrun occured.
INT lsfddiPATHRingLatency	1.3.6.1.4.1.43.17.20	INTEGER	read-only	Reports the measurement (in 80 nanosecond ticks) of total accumulated latency of the ring associated with the current path.
INT lsFMSBackupPSSense	1.3.6.1.4.1.43.17.19	INTEGER	read-only	Reports the presence and status of the backup power supply on FMS LinkSwitch Only.
INT lsIPEchoAgingHelp	1.3.6.1.4.1.43.17.6	INTEGER	read-write	If true, an IP echo frame will be broadcast on the subnet, which will cause otherwise quiecient stations to become active. The rate is half of lsAddressAgingTimer. DURABLE.
OCT lsLEDstate	1.3.6.1.4.1.43.17.9	OCTET STRING	read-only	A binary structure which describes the current state of all of the LEDs of an LinkSwitch. Actual layout available on request.
INT lsLoopDetectAction	1.3.6.1.4.1.43.17.4	INTEGER	read-write	If a station appears to be on two ports, Address Filter thrashing will occur. Detection of this situation is possible, and this object controls the action to be taken when the situation is detected. Default is shutport. no-action means that no action will be taken, but this means Ethernet and FDDI networks will be flooded. NOTE: control of traps indicating the condition is not affected. DURABLE.
INT lsMcastFilterEnable	1.3.6.1.4.1.43.17.3	INTEGER	read-write	When false, all frames with a Multicast Destination Address that does not match any Address Filter entry are forwarded to all ports. Those with a match are forwarded to port. When true, only frames with a Multicast Destination Address with a match in the Address Filter are forwarded to port. Default is false. DURABLE.
INT lsPortAMediaPresent	1.3.6.1.4.1.43.17.17	INTEGER	read-only	Reports presence and type of FDDI Port A Media. For FMS LinkSwitch, only Fiber and UTP are supported.
INT lsPortBMediaPresent	1.3.6.1.4.1.43.17.18	INTEGER	read-only	Reports presence and type of FDDI Port B Media. For FMS LinkSwitch, only Fiber and UTP are supported.
STR lsProdVerHW	1.3.6.1.4.1.43.17.8	DisplayString	read-only	This describes the version of the hardware currently running. Returns a string in the form X.YZ, where X represents the major version, Y represents the minor version or revision, and Z represents the development level of the revision.
STR lsProdVerSW	1.3.6.1.4.1.43.17.7	DisplayString	read-only	This describes the version of the software currently running. Returns a string in the form X.YZ, where X represents the major version, Y represents the minor version or revision, and Z represents the development level of the revision.
INT lsSegmentFilterEnable	1.3.6.1.4.1.43.17.2	INTEGER	read-write	Controls action taken with Eth frames with source and destination stations on the same segment (i.e. port). When true, the Address Filter will not forward intra-segment frames. When false, all frames received are forwarded. Default is true. DURABLE.
INT lsSRFilterEnable	1.3.6.1.4.1.43.17.1	INTEGER	read-write	When false, the Address Filter forwards Source Routed frames, that is, frames with a 1 in the MSB of the Source Address. When true, the Address Filter does not forward Source Routed frames. Default value is false. DURABLE.
PHY lsStationsAddress	1.3.6.1.4.1.43.17.15.1.3	PhysAddress	read-only	A Physical Address which has been seen as a Source Address on this port since the last time the Address Filter was aged.
INT lsStationsAddrIndex	1.3.6.1.4.1.43.17.15.1.2	INTEGER	read-only	The index of this address within a row of the table lsStationsTable, where the row is selected by the value of lsStationsPortIndex.
lsStationsEntry	1.3.6.1.4.1.43.17.15.1		not-accessible
INT lsStationsNumber	1.3.6.1.4.1.43.17.14	INTEGER	read-only	A count of stations whose Physical Address has been detected in the Source Address field of a frame which was transmitted by a station connected to an Ethernet port. Equals the total of all of the per-port stations counts.
INT lsStationsPortIndex	1.3.6.1.4.1.43.17.15.1.1	INTEGER	read-only	The lsEportIndex of the port to which the addresses apply.
lsStationsTable	1.3.6.1.4.1.43.17.15		not-accessible
INT lsTestResult	1.3.6.1.4.1.43.17.10	INTEGER	read-only	When a test is initiated via lsAction, the result of the test is stored in this variable when the test has completed or failed. The value varies by test, is set to one (other) at the start of the test.

RFC description

Manages 3Com FMS and MSH LinkSwitch FDDI/Ethernet bridge filtering and loop detection.

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Download LINKSWITCH-MIB

What Is LINKSWITCH-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description