A3COM-HUAWEI-DLDP2-MIB

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Organization: Hangzhou H3C Technologies. Co., Ltd.

Last Updated: 2011-12-26

Category: Network Interfaces, Vendor: H3C/HH3C

Description: Provides enhanced Device Link Detection Protocol (DLDP v2) configuration and link-state objects on H3C devices.

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What Is A3COM-HUAWEI-DLDP2-MIB?

A3COM-HUAWEI-DLDP2-MIB defines the second version of H3C/3Com's Device Link Detection Protocol, a private Layer 2 protocol used to detect and automatically shut down unidirectional fiber or copper links before they cause loops or blackholes. It exposes global and per-port DLDP configuration (enable state, detection interval, authentication mode/password, unidirectional-shutdown behavior) alongside per-port operational and link status tables. Its core monitoring value is software/link-health status: an operator can see whether DLDP is enabled and functioning per port, and whether a port has been placed into a shutdown state due to a detected unidirectional condition. It is a vendor-private Layer 2 protocol MIB with no direct standards dependency, though it works alongside standard interface (IF-MIB) status objects for full port-state context. It is deployed on H3C/3Com switches interconnected by fiber trunks or long copper runs where single-fiber failures are a known risk. Engineers can download the A3COM-HUAWEI-DLDP2-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in A3COM-HUAWEI-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/3Com Layer 2 switches

Monitoring Examples

An operator walks h3cDldp2PortStatusTable/h3cDldp2PortStatusEntry to read h3cDldp2PortOperStatus and h3cDldp2PortLinkStatus, revealing a port that DLDP has forced down because it detected a unidirectional link, even though the physical link light is still up. Comparing this against h3cDldp2PortConfigTable's h3cDldp2PortEnable confirms detection was actually active on that port. Global settings like h3cDldp2Interval and h3cDldp2AuthMode/h3cDldp2AuthPassword are checked to ensure detection timing and authenticated DLDPDU exchange are configured consistently across a fiber-linked switch pair.

What Can Be Monitored

DLDP global enable state
per-port DLDP enable state
unidirectional link detection status
port operational status
port link (shutdown) status
detection interval and authentication settings

Imported Objects

From A3COM-HUAWEI-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	1.3.6.1.4.1.43.45.1.10.2.117			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	1.3.6.1.4.1.43.45.1.10.2.117.1
T/F h3cDldp2GlobalEnable	1.3.6.1.4.1.43.45.1.10.2.117.1.1	TruthValue	read-write	Enable(true) or disable(false) DLDP on the device.
I32 h3cDldp2Interval	1.3.6.1.4.1.43.45.1.10.2.117.1.2	Integer32	read-write	Indicates the advertisement packet sending interval.
INT h3cDldp2AuthMode	1.3.6.1.4.1.43.45.1.10.2.117.1.3	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	1.3.6.1.4.1.43.45.1.10.2.117.1.4	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	1.3.6.1.4.1.43.45.1.10.2.117.1.5	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	1.3.6.1.4.1.43.45.1.10.2.117.2
h3cDldp2PortConfigTable	1.3.6.1.4.1.43.45.1.10.2.117.2.1		not-accessible	This table contains all ports that support DLDP.
h3cDldp2PortConfigEntry	1.3.6.1.4.1.43.45.1.10.2.117.2.1.1		not-accessible	This entry describes a port that supports DLDP.
T/F h3cDldp2PortEnable	1.3.6.1.4.1.43.45.1.10.2.117.2.1.1.1	TruthValue	read-write	Enable(true) or disable(false) DLDP on a port.
h3cDldp2PortStatusTable	1.3.6.1.4.1.43.45.1.10.2.117.2.2		not-accessible	This table contains all ports enabled with DLDP.
h3cDldp2PortStatusEntry	1.3.6.1.4.1.43.45.1.10.2.117.2.2.1		not-accessible	This entry describes a port enabled with DLDP.
INT h3cDldp2PortOperStatus	1.3.6.1.4.1.43.45.1.10.2.117.2.2.1.1	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	1.3.6.1.4.1.43.45.1.10.2.117.2.2.1.2	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	1.3.6.1.4.1.43.45.1.10.2.117.2.3		not-accessible	This table contains all port's neighbors.
h3cDldp2NeighborEntry	1.3.6.1.4.1.43.45.1.10.2.117.2.3.1		not-accessible	This entry describes a port's neighbors.
MAC h3cDldp2NeighborBridgeMac	1.3.6.1.4.1.43.45.1.10.2.117.2.3.1.1	MacAddress	not-accessible	Indicates the bridge MAC address of a neighbor.
I32 h3cDldp2NeighborPortIndex	1.3.6.1.4.1.43.45.1.10.2.117.2.3.1.2	Integer32	not-accessible	Indicates the port index of a neighbor.
INT h3cDldp2NeighborStatus	1.3.6.1.4.1.43.45.1.10.2.117.2.3.1.3	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	1.3.6.1.4.1.43.45.1.10.2.117.2.3.1.4	Integer32	read-only	Indicates the aging time of a neighbor. If the neighbor status is not 'confirmed', it always returns 0.
h3cDldp2TrapBindObjects	1.3.6.1.4.1.43.45.1.10.2.117.3
h3cDldp2Trap	1.3.6.1.4.1.43.45.1.10.2.117.4
h3cDldp2TrapPrefix	1.3.6.1.4.1.43.45.1.10.2.117.4.0
NTF h3cDldp2TrapUniLink	1.3.6.1.4.1.43.45.1.10.2.117.4.0.1			This trap is generated when DLDP detects a unidirectional link, ifIndex and ifDescr identify the port.
NTF h3cDldp2TrapBidLink	1.3.6.1.4.1.43.45.1.10.2.117.4.0.2			This trap is generated when DLDP detects a bidirectional link, ifIndex and ifDescr identify the port.

RFC description

Device Link Detection Protocol (DLDP) MIB for detecting and shutting down unidirectional fiber/copper links.

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Download A3COM-HUAWEI-DLDP2-MIB

What Is A3COM-HUAWEI-DLDP2-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description