H3C-DLDP2-MIB

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Organization: Hangzhou H3C Technologies. Co., Ltd.

Last Updated: 2011-12-26

Category: Technology: Switching/L2, Vendor: H3C/HH3C

Description: H3C MIB version 2 for Device Link Detection Protocol (DLDP) with enhanced unidirectional link fault detection.

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What Is H3C-DLDP2-MIB?

H3C-DLDP2-MIB is an H3C proprietary MIB implementing version 2 of the Device Link Detection Protocol (DLDP), a Layer 2 protocol used to detect and automatically shut down unidirectional fiber or copper links before they cause network loops or blackholes. It exposes global DLDP configuration such as enable state, detection interval, authentication mode/password, and unidirectional-shutdown behavior, plus per-port configuration and per-port operational and link status. It supports monitoring both configuration/software state, like whether DLDP is globally enabled, and hardware/link-layer fault detection, since h3cDldp2PortOperStatus and h3cDldp2PortLinkStatus reveal whether a port has been automatically disabled due to a detected unidirectional link fault. It is an H3C-proprietary successor to the vendor's original DLDP MIB with no dependency on IETF standard MIBs, though it complements standard interface (IF-MIB) status objects. It is deployed on H3C switches and routers with fiber or copper uplinks where unidirectional link failures must be detected and isolated automatically. Engineers can download the H3C-DLDP2-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in H3C-DLDP2-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

H3C switch
H3C router

Monitoring Examples

An administrator would poll h3cDldp2PortStatusTable/h3cDldp2PortStatusEntry to see h3cDldp2PortOperStatus and h3cDldp2PortLinkStatus for a given port, catching a port that DLDP has forced down due to a suspected unidirectional fiber fault even though the physical link light is still on. Checking h3cDldp2GlobalEnable and h3cDldp2Interval confirms DLDP is active network-wide and how frequently probe packets are sent before such a fault is detected.

What Can Be Monitored

global DLDP enable state
detection interval
per-port DLDP enable state
per-port operational status
per-port link status
authentication mode configuration

Imported Objects

From HUAWEI-3COM-OID-MIB

h3cCommon

OBJECT-IDENTITY

From IF-MIB

ifDescr	OBJECT-TYPE
ifIndex	OBJECT-TYPE

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE

From SNMPv2-TC

MacAddress
TruthValue

OIDs

OID symbolic	OID numeric	Type	Access	Description
h3cDldp2	1.3.6.1.4.1.2011.10.2.117			Device Link Detection Protocol (DLDP) MIB. Device Link Detection Protocol is a private Layer 2 protocol, which can be used to detect and shut down unidirectional links (fiber or copper links) to avoid network problems.
h3cDldp2ScalarGroup	1.3.6.1.4.1.2011.10.2.117.1
T/F h3cDldp2GlobalEnable	1.3.6.1.4.1.2011.10.2.117.1.1	TruthValue	read-write	Enable(true) or disable(false) DLDP on the device.
I32 h3cDldp2Interval	1.3.6.1.4.1.2011.10.2.117.1.2	Integer32	read-write	Indicates the advertisement packet sending interval.
INT h3cDldp2AuthMode	1.3.6.1.4.1.2011.10.2.117.1.3	INTEGER	read-write	Indicates the authentication mode. unknown: cannot be determined for some reason. none: not authenticated. simple: authenticated by a clear text password. md5: authenticated by MD5 digest.
OCT h3cDldp2AuthPassword	1.3.6.1.4.1.2011.10.2.117.1.4	OCTET STRING	read-write	Indicates the authentication password. Setting the password to a zero-length octet string means deleting the password. When read, it always returns a zero-length octet string.
INT h3cDldp2UniShutdown	1.3.6.1.4.1.2011.10.2.117.1.5	INTEGER	read-write	Indicates the shutdown mode when a unidirectional link has been detected. unknown: cannot be determined for some reason. auto: the port will be shutdown automatically. manual: the port must be shut down manually.
h3cDldp2TableGroup	1.3.6.1.4.1.2011.10.2.117.2
h3cDldp2PortConfigTable	1.3.6.1.4.1.2011.10.2.117.2.1		not-accessible	This table contains all ports that support DLDP.
h3cDldp2PortConfigEntry	1.3.6.1.4.1.2011.10.2.117.2.1.1		not-accessible	This entry describes a port that supports DLDP.
T/F h3cDldp2PortEnable	1.3.6.1.4.1.2011.10.2.117.2.1.1.1	TruthValue	read-write	Enable(true) or disable(false) DLDP on a port.
h3cDldp2PortStatusTable	1.3.6.1.4.1.2011.10.2.117.2.2		not-accessible	This table contains all ports enabled with DLDP.
h3cDldp2PortStatusEntry	1.3.6.1.4.1.2011.10.2.117.2.2.1		not-accessible	This entry describes a port enabled with DLDP.
INT h3cDldp2PortOperStatus	1.3.6.1.4.1.2011.10.2.117.2.2.1.1	INTEGER	read-only	Indicates the DLDP operating status on the port. unknown: cannot be determined for some reason. initial: DLDP is not globally enabled. inactive: physical status of the port is down. unidirectional: all neighbors of the port are in 'unconfirmed' status. bidirectional: more than one neighbor of the port is in 'confirmed' status.
INT h3cDldp2PortLinkStatus	1.3.6.1.4.1.2011.10.2.117.2.2.1.2	INTEGER	read-only	Indicates the DLDP link status of the port. unknown: cannot be determined for some reason. down: the DLDP link status of the port is down. up: the DLDP link status of the port is up. If the port operating status is not 'inactive', 'unidirectional', or 'bidirectional', it always returns 'unknown'.
h3cDldp2NeighborTable	1.3.6.1.4.1.2011.10.2.117.2.3		not-accessible	This table contains all port's neighbors.
h3cDldp2NeighborEntry	1.3.6.1.4.1.2011.10.2.117.2.3.1		not-accessible	This entry describes a port's neighbors.
MAC h3cDldp2NeighborBridgeMac	1.3.6.1.4.1.2011.10.2.117.2.3.1.1	MacAddress	not-accessible	Indicates the bridge MAC address of a neighbor.
I32 h3cDldp2NeighborPortIndex	1.3.6.1.4.1.2011.10.2.117.2.3.1.2	Integer32	not-accessible	Indicates the port index of a neighbor.
INT h3cDldp2NeighborStatus	1.3.6.1.4.1.2011.10.2.117.2.3.1.3	INTEGER	read-only	Indicates the status of a neighbor. unknown: cannot be determined for some reason. unconfirmed: unidirectional communication between the port and its neighbor. confirmed: bidirectional communication between the port and its neighbor.
I32 h3cDldp2NeighborAgingTime	1.3.6.1.4.1.2011.10.2.117.2.3.1.4	Integer32	read-only	Indicates the aging time of a neighbor. If the neighbor status is not 'confirmed', it always returns 0.
h3cDldp2TrapBindObjects	1.3.6.1.4.1.2011.10.2.117.3
h3cDldp2Trap	1.3.6.1.4.1.2011.10.2.117.4
h3cDldp2TrapPrefix	1.3.6.1.4.1.2011.10.2.117.4.0
NTF h3cDldp2TrapUniLink	1.3.6.1.4.1.2011.10.2.117.4.0.1			This trap is generated when DLDP detects a unidirectional link, ifIndex and ifDescr identify the port.
NTF h3cDldp2TrapBidLink	1.3.6.1.4.1.2011.10.2.117.4.0.2			This trap is generated when DLDP detects a bidirectional link, ifIndex and ifDescr identify the port.

RFC description

Device Link Detection Protocol for detecting and disabling unidirectional fiber or copper links.

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Download H3C-DLDP2-MIB

What Is H3C-DLDP2-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description