GSWITCH-MIB

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Category: Technology: Switching/L2

Description: Generic switch MIB providing common Layer 2 switching management objects for port, VLAN, and STP configuration.

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What Is GSWITCH-MIB?

GSWITCH-MIB is a generic/proprietary Layer 2 switch MIB (organized under the "nbase"/"gswitch" branch) providing common switching management objects covering port counts, MAC address table entries, uplink configuration, and Spanning Tree operation. It exposes both inventory/versioning data (hardware and software version objects for the base unit, cards, and uplinks) and operational configuration such as port counts, MAC table size/aging behavior, and spanning tree/learning process state. This MIB is notably useful for monitoring both hardware and software status: version objects like nbsBaseHardVers, nbsCardHardVers, nbsUpLinkHardVers, and nbsSoftVers let an administrator confirm hardware revisions and firmware/software version in use, while nbsSpanningTree and nbsLearningProcess reflect whether core switching functions are enabled and operating, and nbsNMacRecords/nbsMacFirstGap reveal MAC table utilization and aging behavior. As a vendor-generic switch MIB it appears self-contained without strong dependency on other standard MIBs, though it overlaps conceptually with BRIDGE-MIB/dot1dBridge functionality. It is typically deployed on entry-to-mid-range managed Ethernet switches from a smaller vendor using this generic switching MIB framework, and administrators typically obtain a GSWITCH-MIB download to load the module into their SNMP management platform.

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

Nbase Communications (later Nbase-Xyplex) managed Ethernet switch — Enterprise OID 629 resolves to Nbase (Nbase Communications, later Nbase-Xyplex), the same vendor identified for FCTR-MIB in round 6; previously left as an unnamed 'smaller vendor'.

Monitoring Examples

An administrator would poll nbsSoftVers and nbsBaseHardVers to confirm the switch is running the expected firmware and hardware revision after a maintenance window, and check nbsNPorts and nbsUpLinkType to verify port count and uplink media type match the expected configuration. Monitoring nbsNMacRecords over time reveals MAC table growth that could indicate a MAC flooding condition or unusual network topology change, while nbsSpanningTree and nbsLearningProcess being disabled unexpectedly would explain a switch not properly participating in loop prevention or address learning.

What Can Be Monitored

hardware/software version
port count
MAC address table size
MAC table aging
spanning tree status
learning process status

Imported Objects

From RFC-1212

OBJECT-TYPE

From RFC-1215

TRAP-TYPE

From RFC1155-SMI

Counter
enterprises

From RFC1213-MIB

DisplayString

OIDs

OID symbolic	OID numeric	Type	Access	Description
gswitch	1.3.6.1.4.1.629.2
nbase	1.3.6.1.4.1.629
nbsAddressTable	1.3.6.1.4.1.629.2.8
INT nbsAddrForwardTo	1.3.6.1.4.1.629.2.8.1.1.6	INTEGER	read-write	This indicates whether to forward frames destined to this MAC address to all ports or only to the destination port
INT nbsAddrIndex	1.3.6.1.4.1.629.2.8.1.1.1	INTEGER	read-only	An index from 1 to 8K. * (number of devices+1)
INT nbsAddrPort	1.3.6.1.4.1.629.2.8.1.1.4	INTEGER	read-write	The source port in this device
INT nbsAddrStatic	1.3.6.1.4.1.629.2.8.1.1.5	INTEGER	read-write	Static indecation bit in the MAC Address entry
INT nbsBackOffMode	1.3.6.1.4.1.629.2.3.16	INTEGER	read-write	The CSMA/CD normal Back of mode multiples the back-off time frame after each each collision. In aggressive mode it stops to multiply after the second time. This way it will have an advantage of any other NIC who uses normal back-off mode.
INT nbsBaseHardVers	1.3.6.1.4.1.629.2.2.3	INTEGER	read-only	Hardware version of base card
INT nbsBufferThreshold	1.3.6.1.4.1.629.2.3.10	INTEGER	read-write	Buffer Threshold Enable. Meaningful only when RMONEn bit (internal) is set. 1 - The buffers allocated to the ports are limited to the number which is written in the Rx Buffers Threshold Register. 2 - There is no limitation on the buffers allocation
INT nbsCardHardVers	1.3.6.1.4.1.629.2.2.4	INTEGER	read-only	Hardware version of the agent card
INT nbsCardIndex	1.3.6.1.4.1.629.2.9.1.1.1	INTEGER	read-only	The slot#. An index from 1 to The number of slots.
nbsCardsEntry	1.3.6.1.4.1.629.2.9.1.1		not-accessible	The entries (records)
nbsCardsTable	1.3.6.1.4.1.629.2.9.1		not-accessible	define the Cards' Types (for NH5500 and other GSWITCH HUBS..).
INT nbsCardType	1.3.6.1.4.1.629.2.9.1.1.2	INTEGER	read-only	The Card's type: copper20Ethernet10or100Base (2) - Slot including 20 fast copper 10/100 MBps Ports; copper40Ethernet10Base (3) - Slot including 40 normal copper 10 MBps Ports; fibre10Ethernet100Base (6) - Slot including 10 fast fibre optic 100 MBps Ports; universal (9) - Slot including Uplink Modules of the different types;
STR nbsCreatinDate	1.3.6.1.4.1.629.2.2.10	DisplayString	read-only	Agent software creation date and time
nbsDeviceControl	1.3.6.1.4.1.629.2.3
nbsDevIdentify	1.3.6.1.4.1.629.2.2
INT nbsForwardMulticast	1.3.6.1.4.1.629.2.3.12	INTEGER	read-write	Forward Multicast. Enable - multicast packets are Forwarded only to the CPU. Disable - multicast packets are being forward to all ports
INT nbsForwardUnkPkts	1.3.6.1.4.1.629.2.3.15	INTEGER	read-write	Forward Unknown Packets. If defines whether the Switch-G will forward Unknown packets to the Agent CPU or not. 1 - Forwared, 2 - Do not forwared
INT nbsLearningProcess	1.3.6.1.4.1.629.2.3.7	INTEGER	read-write	Disable Learning Process. 1 - Learning Process is disabled. The Switch-G will not learn any new addresses from the wire. 2 - Learning Process is enabled
INT nbsLinkTest	1.3.6.1.4.1.629.2.6.1.1.4	INTEGER	read-only	Ports Link Test Fail. Indicates the ports Link Test status 1 - Link Test Pass 2 - Link Test Fail
nbsMACAddrEntry	1.3.6.1.4.1.629.2.8.1.1		not-accessible	The entries (records)
OCT nbsMACAddress	1.3.6.1.4.1.629.2.8.1.1.3	OCTET STRING	read-write	The MAC Address where the packet came from
nbsMACAddrTable	1.3.6.1.4.1.629.2.8.1		not-accessible	The DRAM address table contains all the MAC addresses up to 8K records.
INT nbsMacFirstGap	1.3.6.1.4.1.629.2.11	INTEGER	read-only	The index of the first gap (empty record) in the MAC table
INT nbsNMacRecords	1.3.6.1.4.1.629.2.10	INTEGER	read-only	The number of Records (addresses) in the MAC table
INT nbsNPorts	1.3.6.1.4.1.629.2.1	INTEGER	read-only	The number of ports in this device
INT nbsPALPortIndex	1.3.6.1.4.1.629.2.12.1.1.1	INTEGER	read-only	The number of the real existing PAL port. (the same as [ifIndex] in the MIB-II).
INT nbsPALPortOpticPower	1.3.6.1.4.1.629.2.12.1.1.2	INTEGER	read-only	PAL Port Optic Power status. (interval: 0 - 15)
nbsPALPorts	1.3.6.1.4.1.629.2.12
nbsPALPortsEntry	1.3.6.1.4.1.629.2.12.1.1		not-accessible	The PAL Optic Power Ports status.
nbsPALPortsTable	1.3.6.1.4.1.629.2.12.1		not-accessible	Table contain data only for the existing PAL modules ports.
INT nbsParitionEnable	1.3.6.1.4.1.629.2.3.8	INTEGER	read-write	Partition Mode Enable. When more then 32 collisions occur while transmitting, the Switch-G port enters to the Partition mode. It waits for the first good packet from the wire and then return to Normal mode of opration. In Partition mode transmitting fromthe port is enabled but receiving is disabled. 1 - Patrition mode, 2 - Normal mode
INT nbsPartition	1.3.6.1.4.1.629.2.6.1.1.3	INTEGER	read-only	Ports Partition. Indicates the ports Partition status. 1 - No Partition (Normal mode) 2 - Partition
CTR nbsPortBadByteRec	1.3.6.1.4.1.629.2.7.1.1.16	Counter	read-only	Bad Bytes Recived. Bytes with CRC errors and frame too long
CTR nbsPortBroadByteRec	1.3.6.1.4.1.629.2.7.1.1.4	Counter	read-only	Good Broadcast Bytes Recived
INT nbsPortBroadcast	1.3.6.1.4.1.629.2.5.1.1.7	INTEGER	read-write	Filter Broadcast. 1 - Broadcast packats are forwarded to all ports. 2 - The Switch-G discards Broadcast packats
CTR nbsPortBroadFramesRec	1.3.6.1.4.1.629.2.7.1.1.8	Counter	read-only	Broadcast Frames Recived
CTR nbsPortByteRec	1.3.6.1.4.1.629.2.7.1.1.2	Counter	read-only	Good Bytes Recived
CTR nbsPortByteSent	1.3.6.1.4.1.629.2.7.1.1.5	Counter	read-only	Good Bytes Sent
CTR nbsPortCollisions	1.3.6.1.4.1.629.2.7.1.1.10	Counter	read-only	Recive and Transmit Collision
CTR nbsPortCRCAligErr	1.3.6.1.4.1.629.2.7.1.1.12	Counter	read-only	Recive CRC or Alignment Error
INT nbsPortDuplex	1.3.6.1.4.1.629.2.5.1.1.3	INTEGER	read-write	Half/Full Duplex. 1 - Port works in Half-Duplex mode 2 - Port works in Full-Duplex mode
INT nbsPortEnable	1.3.6.1.4.1.629.2.5.1.1.2	INTEGER	read-write	Port Enable. 1 - Port is enabled 2 - Port is disabled
INT nbsPortForwardUnk	1.3.6.1.4.1.629.2.5.1.1.8	INTEGER	read-write	Forward Unknown. 1 - Unknown packats are forwarded. 2 - The Switch-G does not forward unknown packats to this port
CTR nbsPortFrameLong	1.3.6.1.4.1.629.2.7.1.1.14	Counter	read-only	Recive Frames > 1518 bytes with Good CRC
CTR nbsPortFramesRec	1.3.6.1.4.1.629.2.7.1.1.6	Counter	read-only	Good Frames Recived
CTR nbsPortFramesSent	1.3.6.1.4.1.629.2.7.1.1.9	Counter	read-only	Frames Sent
CTR nbsPortFramesShort	1.3.6.1.4.1.629.2.7.1.1.13	Counter	read-only	Recive Frames
INT nbsPortIndex	1.3.6.1.4.1.629.2.6.1.1.1	INTEGER	read-only	The port# from 1 to nbsNPorts1
INT nbsPortIndex1	1.3.6.1.4.1.629.2.5.1.1.1	INTEGER	read-only	The port# from 1 to nbsNPorts1
INT nbsPortIndex2	1.3.6.1.4.1.629.2.7.1.1.1	INTEGER	read-only	The port# from 1 to nbsNPorts1
CTR nbsPortJabber	1.3.6.1.4.1.629.2.7.1.1.15	Counter	read-only	Recive Frames > 1518 bytes with Bad CRC
CTR nbsPortLateColl	1.3.6.1.4.1.629.2.7.1.1.11	Counter	read-only	Recive and Transmit Late Collision
INT nbsPortMonitor	1.3.6.1.4.1.629.2.5.1.1.5	INTEGER	read-write	Monitoring Mode. 1 - Port works in normal mode 2 - Port is set as Sniffer port (monitor mode) were all recived and transmit packats from all ports are sent to the Sniffer port
CTR nbsPortMulByteRec	1.3.6.1.4.1.629.2.7.1.1.3	Counter	read-only	Good Multicast Bytes Recived
CTR nbsPortMulFramesRec	1.3.6.1.4.1.629.2.7.1.1.7	Counter	read-only	Good Multicast Frames Recived
INT nbsPortPolDetection	1.3.6.1.4.1.629.2.5.1.1.6	INTEGER	read-write	Auto-Polarity Disable. Enable/Disable Auto-Polarity detection function 1 - Disable 2 - Enable
nbsPortsContEntry	1.3.6.1.4.1.629.2.5.1.1		not-accessible	Contains the information necessary to configure/describe a port configuration. The number of rows/entries is fixed. A row/entry may not be created or deleted
nbsPortsControl	1.3.6.1.4.1.629.2.5
nbsPortsContTable	1.3.6.1.4.1.629.2.5.1		not-accessible	A list of the port counters entries
nbsPortsCountEntry	1.3.6.1.4.1.629.2.7.1.1		not-accessible	Contains the information necessary to configure/describe a port configuration. The number of rows/entries is fixed. A row/entry may not be created or deleted
nbsPortsCounters	1.3.6.1.4.1.629.2.7
nbsPortsCountTable	1.3.6.1.4.1.629.2.7.1		not-accessible	A list of the port counters entries
INT nbsPortSpaning	1.3.6.1.4.1.629.2.5.1.1.9	INTEGER	read-write	Spaning Tree Enable. Meaniningful only when Spaning Tree for the switch is set (nbsSpanningTree) is set. 1 - All packets are accepted. 2 - The Switch-G discards all incoming/outgoing packets except for BPDU packets
INT nbsPortSpeed	1.3.6.1.4.1.629.2.5.1.1.10	INTEGER	read-write	Ports Speed. Meaningfull only for ports that support both 10 and 100 MBps speeds. 1 - Only for Uplink Ports: Switch-G - Ports ## 27,28 Switch-G - Ports ## 17,18 2 - After reset the port will operate in 10 MBps 3 - After reset the port will operate in 100 Mbps 4 - The port will operate in 1000 Mbps 5 - The port will operate in 10000 MBps (for example, XFP).
nbsPortsStatEntry	1.3.6.1.4.1.629.2.6.1.1		not-accessible	The ports status information. port configuration. The number of rows/entries is fixed. A row/entry may not be created or deleted
nbsPortsStatTable	1.3.6.1.4.1.629.2.6.1		not-accessible	A list of all the port status objects
nbsPortsStatus	1.3.6.1.4.1.629.2.6
INT nbsPortType	1.3.6.1.4.1.629.2.6.1.1.2	INTEGER	read-only	Port Type
INT nbsRMONmode	1.3.6.1.4.1.629.2.3.9	INTEGER	read-write	RMON Enable. 1 - The Switch-G enters the RMON mode(Station-to-Station connectivity Matrix). 2 - RMON disabled
nbsSlotsTable	1.3.6.1.4.1.629.2.9
INT nbsSnifferPort	1.3.6.1.4.1.629.2.2.9	INTEGER	read-only	Sniffer Port Number. Specify the Sniffer Port Number chosen by the user
INT nbsSoftVers	1.3.6.1.4.1.629.2.2.6	INTEGER	read-only	Agent software version
INT nbsSpanningTree	1.3.6.1.4.1.629.2.3.6	INTEGER	read-write	Spanning Tree Enable. 1 - The BPDU(Bridge Protocol Data Unit) packets are treated as Multicast Packets, and therefore are forwarded to all ports. 2 - Forwards BPDU(Bridge Protocol Data Unit) packets to the CPU only.
INT nbsUpLinkHardVers	1.3.6.1.4.1.629.2.2.5	INTEGER	read-only	Up-Link hardware version
INT nbsUpLinkType	1.3.6.1.4.1.629.2.2.1	INTEGER	read-only	Up-Link Type of the device

RFC description

Manages NBase NH218/NH228 Ethernet switch ports, MAC table, and device identification.

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Download GSWITCH-MIB

What Is GSWITCH-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description