CTRMONXT-MIB

All MIBs › CTRMONXT-MIB

Category: Network Monitoring (RMON), Vendor: Cabletron/Enterasys

Description: Extends RMON with Cabletron-specific statistics, history groups, and extended alarm and event capabilities.

Start monitoring vendor-neutral, standards-based MIB, any SNMPv3-capable network device (SNMP engine identity/boot/clock status) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

What Is CTRMONXT-MIB?

CTRMONXT-MIB is a Cabletron Networks RMON extension MIB that augments the standard RFC 1757 RMON groups with vendor-specific statistics, history, alarm, and event capabilities, plus network-layer host/protocol discovery. Its exposed data spans automatic network-discovery configuration (ctDiscoveryControlTable) and discovered-node/protocol tables (ctDiscoveryMNTable) that classify hosts by protocol type such as IP or Novell NetWare (ctProtIP, ctProtNetware). While its core purpose is traffic/discovery statistics rather than device hardware health, it does let an operator monitor the health of the discovery/monitoring subsystem itself - control-table status, aging interval, and how many stations/protocols have been learned on the segment - which reflects whether the RMON probe/agent function is operating correctly. It explicitly extends and depends on the standard RMON MIB (RFC 1757), building its discovery and extended-alarm features on top of that base. It is deployed on Cabletron/Enterasys switches or RMON probes used for traffic analysis and automated network/host discovery. Engineers can download the CTRMONXT-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CTRMONXT-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

Cabletron/Enterasys switch or RMON probe

Monitoring Examples

An admin would poll ctDiscoveryControlTable/ctDiscoveryControlEntry (indexed by ctDiscoveryControlIndex) to check ctDiscoveryControlStatus and ctDiscoveryControlLastDeleteTime, confirming the discovery process is actively running and aging out stale entries per ctDiscoveryControlAgeInterval. Querying ctDiscoveryMNTable/ctDiscoveryMNEntry together with ctDiscoveryProtocol, ctProtIP, and ctProtNetware would reveal which network-layer protocols are active on a monitored segment, useful for spotting unexpected legacy protocol traffic on a link. ctDiscoveryControlTableSize bounds how many discovered entries the probe retains before aging them out.

What Can Be Monitored

discovery control status
discovery aging interval
discovered node/protocol table
active network-layer protocols (IP, NetWare)
discovery table size/utilization

Imported Objects

From CTRON-MIB-NAMES

ctronRmon

OBJECT-IDENTITY

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

TimeTicks

From RMON-MIB

EntryStatus
OwnerString

OIDs

OID symbolic	OID numeric	Type	Access	Description
ctDiscovery	1.3.6.1.4.1.52.4.3.2.20
ctDiscoveryProtocol	1.3.6.1.4.1.52.4.3.2.20.1
ctProtIP	1.3.6.1.4.1.52.4.3.2.20.1.1
ctProtNetware	1.3.6.1.4.1.52.4.3.2.20.1.2
ctProtDecNet	1.3.6.1.4.1.52.4.3.2.20.1.3
ctDiscoveryControlTable	1.3.6.1.4.1.52.4.3.2.20.2		not-accessible	A list of Discovery Control Entries.
ctDiscoveryControlEntry	1.3.6.1.4.1.52.4.3.2.20.2.1		not-accessible	A list of parameters that set up the discovery of devices by mac address, network address, protocol mapping and the interface they appear on.
INT ctDiscoveryControlIndex	1.3.6.1.4.1.52.4.3.2.20.2.1.1	INTEGER	read-only	An index that uniquely identifies an entry in the ctDiscoveryControl table. Each entry identifies a function that will discover relationships between MAC and Network layer addresses on a particular interface and of a particular protocol. Information about these relationships will be placed in the ctDiscoveryMediaToNetTable and the ctDiscoveryNetToMedia table.
OID ctDiscoveryControlDataSource	1.3.6.1.4.1.52.4.3.2.20.2.1.2	OBJECT IDENTIFIER	read-write	This object identifies the source of the data from which this entry creates address relationships. This source can be any interface on this device. In order to identify a particular interface, this object shall identify the instance of the ifIndex object, defined in [4,6], for the desired interface. For example, if an entry were to receive data from interface #1, this object would be set to ifIndex.1. The statistics in this group reflect all packets on the local network segment attached to the identified interface. This object may not be modified if the associated ctDiscoveryControlStatus object is equal to valid(1).
OID ctDiscoveryControlProtocol	1.3.6.1.4.1.52.4.3.2.20.2.1.3	OBJECT IDENTIFIER	read-write	This object identifies the protocol suite, and hence the type of network addresses in the tables, for the table associated with this control index.. NOTE: In this table, this value applies only to the network layer of the packet.
INT ctDiscoveryControlTableSize	1.3.6.1.4.1.52.4.3.2.20.2.1.4	INTEGER	read-only	The number of ctDiscoveryMediaToNetEntries in the ctDiscoveryMediaToNetTable associated with this ctDiscoveryControlTable. This must also be the number of entries in the ctDiscoveryNetToMediaTable for this ctDiscoveryControlTable.
TIK ctDiscoveryControlLastDeleteTime	1.3.6.1.4.1.52.4.3.2.20.2.1.5	TimeTicks	read-only	The value of sysUpTime when the last entry was deleted from the ctDiscoveryMediaToNetTable associated with this ctDiscoveryControlEntry.
INT ctDiscoveryControlAgeInterval	1.3.6.1.4.1.52.4.3.2.20.2.1.6	INTEGER	read-write	The minimum amount of idle time that will be allowed for an entry before it may be deleted from the table by the agent. The aging routine is not required to run every second.
STR ctDiscoveryControlOwner	1.3.6.1.4.1.52.4.3.2.20.2.1.7	OwnerString	read-write	The entity that configured this entry and is therefore using the resources assigned to it.
ENT ctDiscoveryControlStatus	1.3.6.1.4.1.52.4.3.2.20.2.1.8	EntryStatus	read-write	The status of this ctDiscoveryControl Entry.
ctDiscoveryMNTable	1.3.6.1.4.1.52.4.3.2.20.3		not-accessible	A list of ctDiscoveryMNEntries.
ctDiscoveryMNEntry	1.3.6.1.4.1.52.4.3.2.20.3.1		not-accessible	A MAC/Network address assocaition.
OCT ctDiscoveryMNMACAddress	1.3.6.1.4.1.52.4.3.2.20.3.1.1	OCTET STRING	read-only	The MAC layer address of this MAC/Network association
OCT ctDiscoveryMNNetworkAddress	1.3.6.1.4.1.52.4.3.2.20.3.1.2	OCTET STRING	read-only	The network layer address of this MAC/Network association.
INT ctDiscoveryMNIndex	1.3.6.1.4.1.52.4.3.2.20.3.1.3	INTEGER	read-only	An index that defines the set of collected ctDiscoveryMNEntries of which this entry is part. The set of MAC/Network associations identified by a particular value of this index is associated with the ctDiscoveryControlEntry with the same index.
TIK ctDiscoveryMNCreationTime	1.3.6.1.4.1.52.4.3.2.20.3.1.4	TimeTicks	read-only	The value of SysUpTime when an error free frame with this source MAC/Network address association was detected, and an entry with a corresponding association was not present in the ctDiscoveryMNTable.
TIK ctDiscoveryMNLastTransmitTime	1.3.6.1.4.1.52.4.3.2.20.3.1.5	TimeTicks	read-only	The value of SysUpTime when this entry was last updated. This time correponds to the last time that a frame with the source MAC/Network association of this dicovery entry was detected. This object is useful in that the management station can compute idle time by the difference between this value and current sysUpTime.
INT ctDiscoveryMNBoard	1.3.6.1.4.1.52.4.3.2.20.3.1.6	INTEGER	read-only	The index of the board that this MAC/Network association was last seen on. A value of zero indicates that this information was not available.
INT ctDiscoveryMNPort	1.3.6.1.4.1.52.4.3.2.20.3.1.7	INTEGER	read-only	The index of the port that this MAC/Network association was last seen on. A value of zero indicates that this information was not available.
ctDiscoveryNMTable	1.3.6.1.4.1.52.4.3.2.20.4		not-accessible	A list of ctDiscoveryNMEntries.
ctDiscoveryNMEntry	1.3.6.1.4.1.52.4.3.2.20.4.1		not-accessible	A MAC/Network address assocaition.
OCT ctDiscoveryNMNetworkAddress	1.3.6.1.4.1.52.4.3.2.20.4.1.1	OCTET STRING	read-only	The Network layer address of this MAC/Network association
OCT ctDiscoveryNMMACAddress	1.3.6.1.4.1.52.4.3.2.20.4.1.2	OCTET STRING	read-only	The MAC layer address of this MAC/Network association
INT ctDiscoveryNMIndex	1.3.6.1.4.1.52.4.3.2.20.4.1.3	INTEGER	read-only	An index that defines the set of collected ctDiscoveryNMEntries of which this entry is part. The set of MAC/Network associations identified by a particular value of this index is associated with the ctDiscoveryControlEntry with the same index.
TIK ctDiscoveryNMCreationTime	1.3.6.1.4.1.52.4.3.2.20.4.1.4	TimeTicks	read-only	The value of SysUpTime when an error free frame with this source MAC/Network address association was detected, and an entry with a corresponding association was not present in the ctDiscoveryNMTable.
TIK ctDiscoveryNMLastTransmitTime	1.3.6.1.4.1.52.4.3.2.20.4.1.5	TimeTicks	read-only	The value of SysUpTime when this entry was last updated. This time correponds to the last time that a frame with the source MAC/Network association of this dicovery entry was detected. This object is useful in that the management station can compute idle time by the difference between this value and current sysUpTime.
INT ctDiscoveryNMBoard	1.3.6.1.4.1.52.4.3.2.20.4.1.6	INTEGER	read-only	The index of the board that this MAC/Network association was last seen on. A value of zero indicates that this information was not available.
INT ctDiscoveryNMPort	1.3.6.1.4.1.52.4.3.2.20.4.1.7	INTEGER	read-only	The index of the port that this MAC/Network association was last seen on. A value of zero indicates that this information was not available.

RFC description

Control monitoring extension MIB; vendor-private module for monitoring extended control system metrics.

Start monitoring Cabletron/Enterasys switch or RMON probe (extended RMON) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download CTRMONXT-MIB

What Is CTRMONXT-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description