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What's a MIB?

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.

What's SNMP?

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.

What's an OID?

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/.6527/.3/.1/.2/.49/.1/tmnxPppoePlcyTable/tmnxPppoePlcyEntry/tmnxPppoePlcyUniqueSessIdsPerSap

tmnxPppoePlcyUniqueSessIdsPerSap

OBJECT-TYPE

1.3.6.1.4.1.6527.3.1.2.49.1.2.1.23

Access

read-create

Status

current

Source

TIMETRA-PPPOE-MIB

Sub-identifiers

Description

The value tmnxPppoePlcyUniqueSessIdsPerSap specifies whether each PPPoE session on the same SAP gets a unique session-id. The value 'disabled' specifies that sessions belonging to the same SAP do not get a unique session-id. The session-id gets allocated the default way, meaning that the combination MAC address plus session-id is unique. The value 'perCaptureSap' specifies that sessions created via a specific capture SAP get a unique session-id. This limits the total number sessions that can get created via a specific capture SAP to 1023. The value 'perMsap' specifies that sessions belonging to the same MSAP get a unique session-id. The session-ids are not unique over the corresponding capture SAP. For plain statically configured SAPs the values 'perCaptureSap' and 'perMsap' result in the same. Sessions belonging to that SAP get a unique session-id.

Syntax

INTEGER { perCaptureSap (1), disabled (2), perMsap (3) }