CISCO-WAN-RPM-CONN-EXT-MIB

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Organization: Cisco Systems, Inc.

Last Updated: 2002-05-21

Category: Vendor: Cisco Devices

Description: Extends Cisco WAN RPM (Route Processor Module) connection management with additional attributes.

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What Is CISCO-WAN-RPM-CONN-EXT-MIB?

CISCO-WAN-RPM-CONN-EXT-MIB extends Cisco's WAN ATM connection MIB with additional attributes for provisioning PVC endpoints and Soft PVCs (SPVCs) on the MGX Route Processor Module (RPM). It exposes an extension table adding subinterface, VCD (virtual circuit descriptor), AAL encapsulation type, virtual-template, and OAM (Operation, Administration, and Maintenance) loopback/retry configuration to each RPM connection. Its monitoring role is chiefly in verifying the software/configuration-level health of RPM-hosted ATM connections: OAM-related retry-up and retry-down counters and the loopback transmit interval reveal whether OAM loopback checks are detecting connection failures or flapping. As stated in the module description, it works together with CISCO-WAN-ATM-CONN-MIB, which provides the base connection objects this MIB extends. It is deployed on Cisco MGX platforms using RPM cards for ATM PVC/SPVC provisioning with virtual-template-based subinterfaces, and network engineers typically consult the CISCO-WAN-RPM-CONN-EXT-MIB MIB directly when provisioning or troubleshooting these connections.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-WAN-RPM-CONN-EXT-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 MGX Route Processor Module (RPM)

Monitoring Examples

An engineer would poll cwRpmChanExtTable/cwRpmChanExtEntry to check cwrChanOamRetryDownCount against cwrChanOamRetryUpCount for a given connection, where a high down-retry count relative to up-retries indicates an unstable or failing SPVC path being caught by OAM loopback monitoring. cwrChanVirtualTemplate and cwrChanSubInterface would be checked to confirm the correct subinterface template is applied to a connection. cwrChanOamManage indicates whether OAM management is enabled at all for that channel, which must be true for the retry counters to be meaningful.

What Can Be Monitored

OAM loopback retry up/down counts
OAM loopback transmit interval
subinterface and VCD assignment
AAL encapsulation type
virtual template configuration

Imported Objects

From CISCO-WAN-ATM-CONN-MIB

cwAtmChanCnfgEntry

OBJECT-TYPE

From CISCOWAN-SMI

ciscoWan

OBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

TruthValue

OIDs

OID symbolic	OID numeric	Type	Access	Description
ciscoWanRpmConnExtMIB	1.3.6.1.4.1.351.150.9			This MIB together with the CISCO-WAN-ATM-CONN-MIB support provisioning of PVC endpoints and SPVCs on the MGX's Route Processor Module (RPM).
cwRpmConnExtMIBObjects	1.3.6.1.4.1.351.150.9.1
cwRpmConnExt	1.3.6.1.4.1.351.150.9.1.1
cwRpmChanExtTable	1.3.6.1.4.1.351.150.9.1.1.1		not-accessible	This table together with the 'cwAtmChanCnfgTable' support provisioning of PVC endpoints and SPVCs on an RPM. This table contains objects that are specific to RPM. This table is an augmentation to the 'cwAtmChanCnfgTable'.
cwRpmChanExtEntry	1.3.6.1.4.1.351.150.9.1.1.1.1		not-accessible	Each entry contains RPM specific parameters for a connection endpoint on an RPM.
U32 cwrChanSubInterface	1.3.6.1.4.1.351.150.9.1.1.1.1.1	Unsigned32	read-create	The RPM's backplane sub-interface for which this channel is configured. Sub-interface 0 means the switch port.
U32 cwrChanVcd	1.3.6.1.4.1.351.150.9.1.1.1.1.2	Unsigned32	read-only	Virtual Circuit Descriptor. A unique number which identifies a connection.
INT cwrChanAalEncapType	1.3.6.1.4.1.351.150.9.1.1.1.1.3	INTEGER	read-create	ATM adaptation layer (AAL) and Encapsulation type. aal5ciscoPPP - For Cisco PPP over ATM. 'cwrChanVirtualTemplate' is required to be set for this type. aal5muxAPOLLO - For a multiplex (MUX) - type virtual circuit using the Apollo protocol. aal5muxAPPLETALK - For a MUX-type virtual circuit using the AppleTalk protocol. aal5muxDECNET - For a MUX-type virtual circuit using the DECnet protocol. aal5muxIP - For a MUX-type virtual circuit using the IP protocol. aal5muxIPX - For a MUX-type virtual circuit using the IPX protocol. aal5muxPPP - For a MUX-type virtual circuit using the PPP protocol. 'cwrChanVirtualTemplate' is required to be set for this type. aal5muxVINES - For a MUX-type virtual circuit using the VINES protocol. aal5muxXNS - For a MUX-type virtual circuit using the XNS protocol. aal5nlpid - Allows ATM interfaces to interoperate with HSSI. aal5snap - The only encapsulation supported for Inverse ARP. Logical Link Control/ Subnetwork Access Protocol (LLC/SNAP) precedes the protocol datagram. ilmi - Used to set up communication with ILMI. qsaal - A signalling type PVC used for setting up or tearing down SVCs.
U32 cwrChanVirtualTemplate	1.3.6.1.4.1.351.150.9.1.1.1.1.4	Unsigned32	read-create	This object identifies the virtual template. The non-zero value need to be specified for Cisco PPP or MUX-type PPP encapsulation (i.e. cwrChanAalEncapType = aal5ciscoPPP or aal5muxPPP). The value 0 signifies that Virtual Template is not applicable.
U32 cwrChanInArpInterval	1.3.6.1.4.1.351.150.9.1.1.1.1.5	Unsigned32	read-create	This specifies how often Inverse ARP datagrams will be sent on this channel. 0 will disable the InArp for this channel. This object is only supported for aal5snap encapsulation (i.e. cwrChanAalEncapType = aal5snap).
U32 cwrChanOamLoopbkTxInterval	1.3.6.1.4.1.351.150.9.1.1.1.1.6	Unsigned32	read-create	This specifies how often to generate an OAM F5 loopback cell from this channel. 0 will disable generation of OAM F5 loopback cells.
T/F cwrChanOamManage	1.3.6.1.4.1.351.150.9.1.1.1.1.7	TruthValue	read-create	This enables/disables OAM management for this channel. If set to true(1), OAM management is enabled.
U32 cwrChanOamRetryUpCount	1.3.6.1.4.1.351.150.9.1.1.1.1.8	Unsigned32	read-create	Number of consecutive end-to-end F5 OAM loopback cell responses that must be received in order to change a PVC connection state to up. This object only applies if OAM management is enabled (i.e. cwrChanOAMManage = true).
U32 cwrChanOamRetryDownCount	1.3.6.1.4.1.351.150.9.1.1.1.1.9	Unsigned32	read-create	Number of consecutive end-to-end F5 OAM loopback cell responses that are not received in order to change a PVC connection state to down. This object only applies if OAM management is enabled (i.e. cwrChanOAMManage = true).
U32 cwrChanOamRetryInterval	1.3.6.1.4.1.351.150.9.1.1.1.1.10	Unsigned32	read-create	The frequency that end-to-end F5 OAM loopback cells are transmitted when a change in UP/DOWN state of a PVC is being verified. This object only applies if OAM management is enabled (i.e. cwrChanOAMManage = true).
ciscoWanRpmConnExtMIBConformance	1.3.6.1.4.1.351.150.9.2
ciscoWanRpmConnExtMIBCompliances	1.3.6.1.4.1.351.150.9.2.1
ciscoWanRpmConnExtMIBCompliance	1.3.6.1.4.1.351.150.9.2.1.1			The compliance statement for the Cisco MGX RPM connection management group.
ciscoWanRpmConnExtMIBGroups	1.3.6.1.4.1.351.150.9.2.2
ciscoWanRpmConnExtMIBGroup	1.3.6.1.4.1.351.150.9.2.2.1			Objects related to ATM connection in RPM module.

RFC description

Cisco MIB extension module for WAN RPM (Remote Port Module) connection management on Cisco WAN switching platforms like MGX and IGX series, defining objects for configuring and monitoring connection endpoints.

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Download CISCO-WAN-RPM-CONN-EXT-MIB

What Is CISCO-WAN-RPM-CONN-EXT-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description