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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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HH3C-MCDR-MIB

20 objects

The initial version of this MIB file.

Imported Objects

HH3C-OID-MIB	hh3cCommon
IF-MIB	ifIndex
INET-ADDRESS-MIB	InetAddress InetAddressType
Q-BRIDGE-MIB	VlanId
SNMPv2-SMI	MODULE-IDENTITY OBJECT-TYPE Unsigned32
SNMPv2-TC	DateAndTime TEXTUAL-CONVENTION

OID	Name	Access	Status	Description
1.3.6.1.4.1.25506.2.86	Identityhh3cMultCDR			The initial version of this MIB file.
1.3.6.1.4.1.25506.2.86.1	Nodehh3cMultCDRCfgObject
1.3.6.1.4.1.25506.2.86.1.1	Scalarhh3cMultCDRStatus	read-write	current	Configure to enable or disable multicast CDR function.
1.3.6.1.4.1.25506.2.86.1.2	Scalarhh3cMultCDRReportInterval	read-write	current	Configure the multicast CDR report-interval. Unit: second.
1.3.6.1.4.1.25506.2.86.1.3	Scalarhh3cMultCDRCacheLimit	read-write	current	Configure the multicast CDR cache-limit.
1.3.6.1.4.1.25506.2.86.1.4	Scalarhh3cMultCDRRecordDelay	read-write	current	Configure the multicast CDR record-delay. Unit: second
1.3.6.1.4.1.25506.2.86.1.5	Scalarhh3cMultCDRRecordSend	read-write	current	Send record at once.
1.3.6.1.4.1.25506.2.86.2	Tablehh3cMultUserOnlineInfoTable	not-accessible	current	Multicast user online information table.
1.3.6.1.4.1.25506.2.86.2.1	Rowhh3cMultUserOnlineInfoEntry	not-accessible	current	The entry of multicast user online information table.
1.3.6.1.4.1.25506.2.86.2.1.1	Columnhh3cMultUserRecordID	not-accessible	current	The index of online record.
1.3.6.1.4.1.25506.2.86.2.1.2	Columnhh3cMultUserSubIfIndex	read-only	current	The index of sub-interface which is active. If the value is zero, hh3cMultUserSubIfIndex should be ignored.
1.3.6.1.4.1.25506.2.86.2.1.3	Columnhh3cMultUserVlanID	read-only	current	The ID of VLAN in which the user joined the multicast group.
1.3.6.1.4.1.25506.2.86.2.1.4	Columnhh3cMultUserJoinGAddrType	read-only	current	Type of the multicast group IP address.
1.3.6.1.4.1.25506.2.86.2.1.5	Columnhh3cMultUserJoinGAddr	read-only	current	The multicast group address which the user joined.
1.3.6.1.4.1.25506.2.86.2.1.6	Columnhh3cMultUserJoinSAddrType	read-only	current	Type of the multicast source IP address.
1.3.6.1.4.1.25506.2.86.2.1.7	Columnhh3cMultUserJoinSAddr	read-only	current	The multicast source address which the user joined. If the value is '0.0.0.0'(IPv4) or '::'(IPv6), hh3cMultUserJoinSAddr should be ignored.
1.3.6.1.4.1.25506.2.86.2.1.8	Columnhh3cMultUserStatus	read-only	current	The current status of user. permit - user in permit status. preview - user in preview status.
1.3.6.1.4.1.25506.2.86.2.1.9	Columnhh3cMultUserJoinTime	read-only	current	The time when the user joined the multicast group.
1.3.6.1.4.1.25506.2.86.2.1.10	Columnhh3cMultUserPreviewTimes	read-only	current	The times of multicast preview which the user joined. If hh3cMultUserStatus is not preview, hh3cMultUserPreviewTimes should be ignored.
1.3.6.1.4.1.25506.2.86.2.1.11	Columnhh3cMultUserPreviewRemain	read-only	current	The remanent time slice of multicast preview which the user joined. If hh3cMultUserStatus is not preview, hh3cMultUserPreviewRemain should be ignored.