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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-MGMD-STD-MIB

16 objects

The Management MIB for Internet Group Management Protocol (IGMP) and Multicast Listener Discover (MLD)

Imported Objects

HH3C-OID-MIB	hh3cCommon
IF-MIB	InterfaceIndex
INET-ADDRESS-MIB	InetAddress InetAddressType
SNMPv2-SMI	MODULE-IDENTITY NOTIFICATION-TYPE OBJECT-TYPE Unsigned32
SNMPv2-TC	DisplayString

OID	Name	Access	Status	Description
1.3.6.1.4.1.25506.2.223	Identityhh3cMgmdStd			The Management MIB for Internet Group Management Protocol (IGMP) and Multicast Listener Discover (MLD)
1.3.6.1.4.1.25506.2.223.0	Nodehh3cMgmdStdNotifications
1.3.6.1.4.1.25506.2.223.0.1	Notificationhh3cMgmdStdGmpJoin		current	An hh3cMgmdStdGmpJoin notification signifies the IGMP or MLD join message was received.
1.3.6.1.4.1.25506.2.223.0.2	Notificationhh3cMgmdStdGmpLeave		current	An hh3cMgmdStdGmpLeave notification signifies the IGMP or MLD group leaved.
1.3.6.1.4.1.25506.2.223.1	Nodehh3cMgmdStdTrapBindObjects
1.3.6.1.4.1.25506.2.223.1.1	Scalarhh3cMgmdStdInterfaceName	accessible-for-notify	current	The interface name of the interface for which IGMP or MLD is enabled.
1.3.6.1.4.1.25506.2.223.1.2	Scalarhh3cMgmdStdInterfaceIfIndex	accessible-for-notify	current	The ifIndex value of the interface for which IGMP or MLD is enabled. The table is indexed by the ifIndex value and the InetAddressType to allow for interfaces …
1.3.6.1.4.1.25506.2.223.1.3	Scalarhh3cMgmdStdGmpJoinVersion	accessible-for-notify	current	The version of MGMD which is running on this interface. Value 1 applies to IGMPv1 and MLDv1 version. Value 2 applies to IGMPv2 and MLDv2 version, and value 3 a…
1.3.6.1.4.1.25506.2.223.1.4	Scalarhh3cMgmdStdAddressType	accessible-for-notify	current	The address type of this IGMP or MLD message.
1.3.6.1.4.1.25506.2.223.1.5	Scalarhh3cMgmdStdGmpJoinSrcAddr	accessible-for-notify	current	The IGMP or MLD source address to join.
1.3.6.1.4.1.25506.2.223.1.6	Scalarhh3cMgmdStdGmpJoinGrpAddr	accessible-for-notify	current	The IGMP or MLD group address to join.
1.3.6.1.4.1.25506.2.223.1.7	Scalarhh3cMgmdStdGmpJoinSenderIp	accessible-for-notify	current	The host IP address for sending membership report.
1.3.6.1.4.1.25506.2.223.1.8	Scalarhh3cMgmdStdInstanceName	accessible-for-notify	current	The Name of the Protocol Independent Multicast (PIM) instance.
1.3.6.1.4.1.25506.2.223.2	Nodehh3cMgmdStdObjects
1.3.6.1.4.1.25506.2.223.2.1	Scalarhh3cMgmdStdGmpJoinNotifPeriod	read-write	current	The minimum time that must elapse between hh3cMgmdStdGmpJoin notifications originated by this router. The maximum value 65535 represents an 'infinite' time, in…
1.3.6.1.4.1.25506.2.223.2.2	Scalarhh3cMgmdStdGmpLeaveNotifPeriod	read-write	current	The minimum time that must elapse between hh3cMgmdStdGmpLeave notifications originated by this router. The maximum value 65535 represents an 'infinite' time, i…