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A MIB (Management Information Base) is a structured document that defines the data a device exposes over SNMP — things like interface counters, system uptime, or CPU load. Each module declares a set of named objects, organized into a tree.

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SNMP (Simple Network Management Protocol) is how network devices — routers, switches, servers — report status and statistics to monitoring tools. It's the protocol; MIBs are the vocabulary it uses to describe what's being asked for.

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An OID (Object Identifier) is the numeric address of one piece of data in a MIB — a dotted sequence like 1.3.6.1.2.1.1.1, read from the root of a global tree down to one specific object. Names are easier to read; OIDs are what's actually sent over the wire.

Try it: sysDescr (1.3.6.1.2.1.1.1) →

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iso/org/dod/internet/private/enterprises/.28350/.4/.1/.3/mc2200-FEMCTable/mc2200-FEMCEntry

mc2200-FEMCEntry

OBJECT-TYPE

1.3.6.1.4.1.28350.4.1.3.20.1

Access

not-accessible

Status

current

Source

OnAccess2200-MIB

Sub-identifiers

Description

One table entry per slot in the media converter chassis. If physical slot 'n' contains a powered FEMC media converter, then entry 'n' in this table exists and describes the state of the converter's lamps If slot 'n' is empty, does not exist, or contains a different type of device, then table entry 'n' does not exist.

Syntax

MC2200-FEMCEntry

Children (65)

.1mc2200-FEMCCardIndex .2mc2200-FEMCLocalLANSFPInfo .3mc2200-FEMCLocalLANLink .4mc2200-FEMCLocalWANSFPInfo .5mc2200-FEMCLocalWANLink .6mc2200-FEMCLocalLANDownStreamBW .7mc2200-FEMCLocalLANUpStreamBW .8mc2200-FEMCLocalLANMode .9mc2200-FEMCRxGoodOctets .11mc2200-FEMCRxBadOctets .12mc2200-FEMCTxFCSErr .13mc2200-FEMCRxUnicast .14mc2200-FEMCTxDeferred .15mc2200-FEMCRxBroadcasts .16mc2200-FEMCRxMulticasts .17mc2200-FEMCRx64Octets .18mc2200-FEMCRx65to127Octets .19mc2200-FEMCRx128to255Octets .20mc2200-FEMCRx256to511Octets .21mc2200-FEMCRx512to1023Octets .22mc2200-FEMCRx1024toMaxOctets .23mc2200-FEMCTxOctets .25mc2200-FEMCTxUnicast .26mc2200-FEMCTxExcessive .27mc2200-FEMCTxMulticasts .28mc2200-FEMCTxBroadcasts .29mc2200-FEMCTxSingle .30mc2200-FEMCTxPause .31mc2200-FEMCRxPause .32mc2200-FEMCTxMultiple .33mc2200-FEMCRxUndersize .34mc2200-FEMCRxFragments .35mc2200-FEMCRxOversize .36mc2200-FEMCRxJabber .37mc2200-FEMCRxErr .38mc2200-FEMCRxFCSErr .39mc2200-FEMCTxCollisions .40mc2200-FEMCTxLate .41mc2200-FEMCRemoteLANSFPInfo .42mc2200-FEMCRemoteLANLink .43mc2200-FEMCRemoteWANSFPInfo .44mc2200-FEMCRemoteWANLink .45mc2200-FEMCRemoteLANMode .46mc2200-FEMCRemoteIPAddress .47mc2200-FEMCRemoteSubnetMask .48mc2200-FEMCRemoteGateWay .49mc2200-FEMCRemoteVLANEnable .50mc2200-FEMCRemoteVID .51mc2200-FEMCRemoteAlarm .52mc2200-FEMCRFD .53mc2200-FEMCDefault .54mc2200-FEMCReboot .55mc2200-FEMCLocalLANSpeed .56mc2200-FEMCRemoteLANSpeed .57mc2200-FEMCLocalportuser .58mc2200-FEMCRemoteportuser .59mc2200-FEMCWANOpticalPowerCheck .60mc2200-FEMCWANThreshold .61mc2200-FEMCTrapFilterLocalLAN .62mc2200-FEMCTrapFilterLocalWAN .63mc2200-FEMCTrapFilterRemotePower .64mc2200-FEMCTrapFilterRemoteLAN .65mc2200-FEMCTrapFilterRemoteWAN .66mc2200-FEMCLoopback .67mc2200-FEMCCardType