A3COM-HUAWEI-MPLSOAM-PS-MIB

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Organization: Huawei 3Com Technologies Co., Ltd.

Last Updated: 2007-03-31

Category: MPLS and Traffic Engineering, Vendor: H3C/HH3C

Description: Extends MPLS OAM management with protection switching capabilities on H3C/3Com devices, enabling monitored failover between primary and backup LSPs.

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What Is A3COM-HUAWEI-MPLSOAM-PS-MIB?

A3COM-HUAWEI-MPLSOAM-PS-MIB is a joint H3C/3Com (post-merger Huawei-3Com) enterprise MIB extending MPLS OAM management with protection-switching (PS) capability for MPLS LSPs on their routing platforms. It exposes configuration and status data for protection groups pairing a working LSP with a backup LSP, including revertive-mode settings, wait-to-restore (WTR) and hold-off timers, and the detected working-LSP failure condition and switch trigger. This directly supports monitoring the software-level fault/failover status of MPLS traffic-protection groups, letting an admin see whether a group has switched to its protection LSP and why, functioning as a fault/traps MIB for MPLS resiliency rather than raw hardware health. It builds on and depends on the underlying MPLS-related MIBs (e.g. MPLS-LSR/TE MIBs) for LSP identity, and defines its own scalar trap-enable object and notifications for switchover events. It is deployed on H3C/3Com/Huawei MPLS-capable routers and switches that use 1:1 LSP protection switching for carrier-grade resiliency, with the A3COM-HUAWEI-MPLSOAM-PS-MIB MIB providing the SNMP interface into that protection-switching state.

IPNetwork Monitor allows you to monitor SNMP objects defined in A3COM-HUAWEI-MPLSOAM-PS-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/Huawei MPLS-capable routers and switches

Monitoring Examples

An admin would poll h3cMplsPsTable/h3cMplsPsEntry indexed by h3cMplsPsIndex to check h3cMplsPsWorkLspName and h3cMplsPsProtectLspName status, along with h3cMplsPsWorkLspDetectState and h3cMplsPsSwitchCondition. If h3cMplsPsWorkLspDetectState shows a fault on the working LSP and h3cMplsOamPsTrapOpen notifications fire, that reveals an automatic failover to the protect LSP within the h3cMplsPsGroupID group, with h3cMplsPsWTR/h3cMplsPsHoldOff governing how quickly it reverts back.

What Can Be Monitored

working LSP name
protect LSP name
protection group revertive mode
wait-to-restore timer
hold-off timer
LSP failure/switch condition

Imported Objects

From A3COM-HUAWEI-OID-MIB

h3cCommon

OBJECT-IDENTITY

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

RowStatus
TruthValue

OIDs

OID symbolic	OID numeric	Type	Access	Description
h3cMplsOamPs	1.3.6.1.4.1.43.45.1.10.2.80			This MIB contains objects to configure mpls protect-switch module.
h3cMplsOamPsScalarGroup	1.3.6.1.4.1.43.45.1.10.2.80.1
T/F h3cMplsOamPsTrapOpen	1.3.6.1.4.1.43.45.1.10.2.80.1.1	TruthValue	read-write	Whether mpls protect-switch trap is globally enabled. false: disable; true: enable
h3cMplsOamPsTable	1.3.6.1.4.1.43.45.1.10.2.80.2
h3cMplsPsTable	1.3.6.1.4.1.43.45.1.10.2.80.2.1		not-accessible	This table specifies per-protection-group MPLS PS capability and associated information.
h3cMplsPsEntry	1.3.6.1.4.1.43.45.1.10.2.80.2.1.1		not-accessible	An entry in this table is created by an LSR for every protection group capable of supporting mpls ps.
I32 h3cMplsPsIndex	1.3.6.1.4.1.43.45.1.10.2.80.2.1.1.1	Integer32	not-accessible	This is a unique index for an entry in the mplspsEntry.
I32 h3cMplsPsGroupID	1.3.6.1.4.1.43.45.1.10.2.80.2.1.1.2	Integer32	read-create	This is a unique group id for an entry in the mplspsEntry. One protect-switch group is composed of one working static-lsp and one protection static-lsp.
OCT h3cMplsPsWorkLspName	1.3.6.1.4.1.43.45.1.10.2.80.2.1.1.3	OCTET STRING	read-create	The name of the working static-lsp.
OCT h3cMplsPsProtectLspName	1.3.6.1.4.1.43.45.1.10.2.80.2.1.1.4	OCTET STRING	read-create	The name of the protection static-lsp.
I32 h3cMplsPsRevertiveMode	1.3.6.1.4.1.43.45.1.10.2.80.2.1.1.5	Integer32	read-create	Revertive mode is a protection switching mode where revertive action (switch back to the working LSP) is taken after the working LSP is repaired. And switching does not occur in a non-revertive mode. 1: revertive; 2: non-revertive;
I32 h3cMplsPsWTR	1.3.6.1.4.1.43.45.1.10.2.80.2.1.1.6	Integer32	read-create	Wait to Restore timer is only applicable for the revertive mode and applies to a working LSP, it prevents reversion back to select the working LSP until the Wait to Restore timer has expired. The default value is 12 minutes. step is 30s.
I32 h3cMplsPsHoldOff	1.3.6.1.4.1.43.45.1.10.2.80.2.1.1.7	Integer32	read-create	The time between declaration of signal degrade or signal fail, and the initialization of the protection switching algorithm. Step is 100ms, maximum is 10s.
I32 h3cMplsPsSwitchCondition	1.3.6.1.4.1.43.45.1.10.2.80.2.1.1.8	Integer32	read-create	The current switch condition of the protection group. 1: clear, this command clears all of the externally initiated switch commands listed below; 2: lockout of protection, fix the selector position on the working LSP, Prevents the selector from switching to the protection LSP when it is selecting the working LSP. Switches the selector from the protection to the working LSP when it is selecting the protection LSP; 3: forced protection, switches the selector from the working LSP to the protection LSP (unless a higher priority switch request (i.e., LoP) is in effect); 4: signal fail, for 1:1, Signal Fail (SF) is declared when the source of the protection domain enters the Defect State by receiving a BDI packet (from the return LSP or out of band). 5: manual switch for working-lsp, switches the selector from the working LSP to the protection LSP (unless an equal or higher priority switch request (i.e., LoP, FS, SF or MS) is in effect); 6: manual switch for protection-lsp, switches the selector from the protection LSP to the working LSP (unless an equal or higher priority switch request (i.e., LoP, FS, SF or MS) is in effect). 7: WTR-timer, a configurable timer which is used to delay before reversion; 8: HoldOff-timer, the time between declaration of signal degrade or signal fail, and the initialization of the protection switching algorithm; 9: Others; The pripority of the commands are: clear > lockout of protection > force switch > manual switch for working lsp = manual switch for protection lsp
I32 h3cMplsPsWorkLspDetectState	1.3.6.1.4.1.43.45.1.10.2.80.2.1.1.9	Integer32	read-only	The state of working static-lsp state in one protection group, whether it is in defect: 1: it is out of defect; 2: it enters defect.
I32 h3cMplsPsWorkLspUpDownState	1.3.6.1.4.1.43.45.1.10.2.80.2.1.1.10	Integer32	read-only	The state of working static-lsp state in one protection group, whether it is up or down: 1: it is in up state; 2: it is in down state.
I32 h3cMplsPsProtLspDetectState	1.3.6.1.4.1.43.45.1.10.2.80.2.1.1.11	Integer32	read-only	The state of protection static-lsp state in one protection group, whether it is in detection: 1: it is out of defect; 2: it enters defect.
I32 h3cMplsPsProtLspUpDownState	1.3.6.1.4.1.43.45.1.10.2.80.2.1.1.12	Integer32	read-only	The state of protection static-lsp state in one protection group, whether it is up or down: 1: it is in up state; 2: it is in down state.
I32 h3cMplsPsSwitchResult	1.3.6.1.4.1.43.45.1.10.2.80.2.1.1.13	Integer32	read-only	Which tunnel is used to transfer the data stream. 1: working static-lsp; 2: protection static-lsp.
ROW h3cMplsPsRowStatus	1.3.6.1.4.1.43.45.1.10.2.80.2.1.1.14	RowStatus	read-create	This object is responsible for managing the creation, deletion and modification of rows, which support active status and CreatAndGo, destroy operation. To create a new row, h3cMplsPsGroupID, h3cMplsPsWorkLspName, h3cMplsPsProtectLspName, h3cMplsPsRevertiveMode, h3cMplsPsWTR and h3cMplsPsHoldOff must be specified.
h3cMplsOamPsNotifications	1.3.6.1.4.1.43.45.1.10.2.80.3
NTF h3cMplsPsSwitchPtoW	1.3.6.1.4.1.43.45.1.10.2.80.3.1			This notification is generated when switching from protection-lsp to working-lsp occured.
NTF h3cMplsPsSwitchWtoP	1.3.6.1.4.1.43.45.1.10.2.80.3.2			This notification is generated when switching from woking-lsp to protection-lsp occured.

RFC description

Manages MPLS protection switching (PS) configuration and monitoring for H3C systems.

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Download A3COM-HUAWEI-MPLSOAM-PS-MIB

What Is A3COM-HUAWEI-MPLSOAM-PS-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description