CISCO-IETF-VPLS-LDP-MIB

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Organization: Cisco Systems, Inc.

Last Updated: 2007-11-22

Category: Cisco Devices, MPLS and Traffic Engineering, VPN and Security

Description: Implements the IETF VPLS LDP MIB for managing LDP-signaled Virtual Private LAN Service instances.

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What Is CISCO-IETF-VPLS-LDP-MIB?

CISCO-IETF-VPLS-LDP-MIB covers LDP-signaled Virtual Private LAN Service (VPLS), part of Cisco's L2VPN/MPLS product area, based on the IETF L2VPN-VPLS-LDP draft. It exposes a per-instance configuration table (cvplsLdpConfigTable) for LDP-signaled VPLS settings and a pseudo-wire binding table (cvplsLdpPwBindTable) linking each VPLS instance to its underlying pseudowires. Rather than physical hardware health, this MIB monitors the software/service status of the VPLS forwarding plane -- MAC address withdrawal activity and MAC-address-limit enforcement per pseudowire binding -- which reveal whether the L2VPN service is converging and forwarding correctly. It is built on the underlying MPLS pseudowire mechanisms and LDP signaling that must already be provisioned on the router. It is typically deployed on carrier-edge (PE) routers providing Ethernet multipoint service over an MPLS core. Engineers can download the CISCO-IETF-VPLS-LDP-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-IETF-VPLS-LDP-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

Cisco MPLS provider-edge (PE) routers/switches (e.g. ASR 9000, 7600 series) running LDP-signaled VPLS/L2VPN

Monitoring Examples

cvplsLdpConfigTable/cvplsLdpConfigEntry holds per-VPLS-instance LDP settings such as cvplsLdpConfigMacAddrWithdraw, while cvplsLdpPwBindTable/cvplsLdpPwBindEntry binds each instance to its pseudowires and enforces cvplsLdpPwBindMacAddressLimit. An operator polling cvplsLdpPwBindTable can confirm each pseudowire underlying a VPLS instance is bound and active, and watching learned MAC counts against cvplsLdpPwBindMacAddressLimit reveals when a customer site is approaching the configured limit. If cvplsLdpConfigMacAddrWithdraw is disabled, slow MAC re-convergence after a link flap on a remote PE would be an expected symptom to investigate.

What Can Be Monitored

VPLS instance LDP configuration
pseudowire binding state per VPLS instance
MAC address withdrawal activity
MAC address learning limit per binding

Imported Objects

From CISCO-IETF-VPLS-GENERIC-MIB

cvplsConfigIndex	OBJECT-TYPE
cvplsPwBindIndex	OBJECT-TYPE

From CISCO-SMI

ciscoExperiment

OBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

TruthValue

From VPN-TC-STD-MIB

VPNId

OIDs

OID symbolic	OID numeric	Type	Access	Description
cvplsLdpMIB	1.3.6.1.4.1.9.10.141			This MIB module contains managed object definitions for LDP signalled Virtual Private LAN Services as in [L2VPN-VPLS-LDP] This MIB module enables the use of any underlying Pseudo Wire network. This MIB is based on the following IETF document. http://www1.tools.ietf.org/html/draft-nadeau-l2vpn-vpls-mib-03
cvplsLdpObjects	1.3.6.1.4.1.9.10.141.1
cvplsLdpConfigTable	1.3.6.1.4.1.9.10.141.1.1		not-accessible	This table specifies information for configuring and monitoring LDP specific parameters for Virtual Private Lan Services(VPLS).
cvplsLdpConfigEntry	1.3.6.1.4.1.9.10.141.1.1.1		not-accessible	A row in this table represents LDP specific information for Virtual Private Lan Service(VPLS) in a packet network. It is indexed by cvplsConfigIndex, which uniquely identifies a single VPLS. A row is automatically created when a VPLS service is configured using LDP signalling. None of the read-create objects values can be changed when cvplsRowStatus is in the active(1) state. Changes are allowed when the cvplsRowStatus is in notInService(2) or notReady(3) states only. If the operator need to change one of the values for an active row the cvplsConfigRowStatus should be first changed to notInService(2), the objects may be changed now, and later to active(1) in order to re-initiate the signaling process with the new values in effect.
T/F cvplsLdpConfigMacAddrWithdraw	1.3.6.1.4.1.9.10.141.1.1.1.1	TruthValue	read-create	This object specifies if MAC address withdrawl is enabled in this service. If this object is true then Mac address withdrawl Learning is enabled. If false, then Mac Learning is disabled.
cvplsLdpPwBindTable	1.3.6.1.4.1.9.10.141.1.2		not-accessible	This table provides LDP specific information for an association between a VPLS service and the corresponding Pseudo Wires. A service can have more than one Pseudo Wire association. Pseudo Wires are defined in the cpwTable.
cvplsLdpPwBindEntry	1.3.6.1.4.1.9.10.141.1.2.1		not-accessible	Each row represents an association between a VPLS instance and one or more Pseudo Wires defined in the cpwTable. Each index is unique in describing an entry in this table. However both indexes are required to define the one to many association of service to pseudowire. An entry in this table is instantiated only when LDP signalling is used to configure VPLS service. Each entry in this table provides LDP specific information for the VPlS represented by cvplsConfigIndex.
U32 cvplsLdpPwBindMacAddressLimit	1.3.6.1.4.1.9.10.141.1.2.1.1	Unsigned32	read-create	The value of this object specifies the maximum number of learned and static entries allowed in the Forwarding database for this PW Binding. The value 0 means there is no limit for this PW Binding.
cvplsLdpConformance	1.3.6.1.4.1.9.10.141.2
cvplsLdpCompliances	1.3.6.1.4.1.9.10.141.2.1
cvplsLdpModuleFullCompliance	1.3.6.1.4.1.9.10.141.2.1.1			Compliance requirement for implementations that provide full support for CISCO-IETF-VPLS-LDP-MIB. Such devices can then be monitored and configured using this MIB module.
cvplsLdpModuleReadOnlyCompliance	1.3.6.1.4.1.9.10.141.2.1.2			Compliance requirement for implementations that only provide read-only support for CISCO-IETF-VPLS-LDP-MIB. Such devices can then be monitored but cannot be configured using this MIB modules.
cvplsLdpGroups	1.3.6.1.4.1.9.10.141.2.2
cvplsLdpGroup	1.3.6.1.4.1.9.10.141.2.2.1			The group of objects supporting management of L2VPN VPLS services using LDP.

RFC description

Cisco VPLS Virtual Private LAN Services LDP label distribution protocol configuration.

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Download CISCO-IETF-VPLS-LDP-MIB

What Is CISCO-IETF-VPLS-LDP-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description