CTIF-EXT-MIB

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Category: Network Interfaces, Vendor: Cabletron/Enterasys

Description: Extends standard IF-MIB with Cabletron-specific interface attributes including duplex mode and flow control status.

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What Is CTIF-EXT-MIB?

CTIF-EXT-MIB is a Cabletron Systems (predecessor to Enterasys) proprietary MIB that extends the standard IETF IF-MIB with additional per-port interface attributes for Cabletron network switches and hubs. It exposes interface configuration and capability data - duplex mode, locally administered address, port capability flags, and redundancy status - along with device-level clock and board-map information. It supports monitoring hardware/software status indirectly: ctIfDuplex reveals negotiated link duplex state (useful for spotting duplex mismatches), ctIfRedundancy shows redundant-link health, and comDeviceBoardMap exposes the chassis's board/module inventory. It explicitly depends on and extends the standard IETF IF-MIB, reusing its interface indexing. It is typically deployed on legacy Cabletron/Enterasys switches and hubs, where CTIF-EXT-MIB SNMP monitoring provides finer per-port diagnostics than IF-MIB alone.

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

Cabletron Systems switches and hubs
Enterasys network switches (legacy Cabletron-derived)

Monitoring Examples

ctIfTable/ctIfEntry extend ifTable with fields such as ctIfDuplex, ctIfLAA, and ctIfCapability; an admin polling ctIfDuplex across ports can catch a duplex mismatch that is causing excessive collisions on a link. ctIfRedundancy flags whether a port belongs to a redundant pair, useful for confirming failover readiness before a planned link test. comDeviceBoardMap and comDeviceTime/comDeviceDate expose the chassis board layout and onboard clock, which an operator would check to confirm module inventory and time sync during troubleshooting, while ctIfPortCnt/ctIfNumber report total port counts on the device.

What Can Be Monitored

per-port duplex mode
port capability flags
redundant link pairing status
device board/module inventory
device clock/date
total port/interface count

Imported Objects

From CTRON-MIB-NAMES

ctronMib2

OBJECT-IDENTITY

From IF-MIB

ifIndex

OBJECT-TYPE

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

Counter

From RFC1213-MIB

DisplayString

OIDs

OID symbolic	OID numeric	Type	Access	Description
commonDev	1.3.6.1.4.1.52.4.3.3.1
STR comDeviceTime	1.3.6.1.4.1.52.4.3.3.1.1	DisplayString	read-write	The current time of day, in 24 hour format, as measured by the device. The representation shall use the standard HHMMSS format.
STR comDeviceDate	1.3.6.1.4.1.52.4.3.3.1.2	DisplayString	read-write	The current date, as measured by the device. The representation shall use the standard MMDDYYYY format.
INT comDeviceBoardMap	1.3.6.1.4.1.52.4.3.3.1.3	INTEGER	read-only	Contains a bit encoded representation of slots that contain MIM boards. If a bit is one then that slot is occupied by a board.
ctIf	1.3.6.1.4.1.52.4.3.3.2
ctIfTable	1.3.6.1.4.1.52.4.3.3.2.1		not-accessible	This table defines an extension to the interface table.
ctIfEntry	1.3.6.1.4.1.52.4.3.3.2.1.1		not-accessible	This defines each conceptual row within the ctIfTable
INT ctIfNumber	1.3.6.1.4.1.52.4.3.3.2.1.1.1	INTEGER	read-only	This defines the interface that is being described. This is the same as ifIndex.
INT ctIfPortCnt	1.3.6.1.4.1.52.4.3.3.2.1.1.2	INTEGER	read-only	This defines the number of ports on the interface that is being described.
OID ctIfConnectionType	1.3.6.1.4.1.52.4.3.3.2.1.1.3	OBJECT IDENTIFIER	read-only	Defines the specific type of the interface connection (BRIM, etc). This is defined within ctron-oids. This differs from the nature of the interface as defined by ifType as found in MIB-II.
OCT ctIfLAA	1.3.6.1.4.1.52.4.3.3.2.1.1.4	OCTET STRING	read-write	This object is used by a device (with a Token Ring interface) to set a Locally Administered Address (LAA) for it's MAC hardware address. When set, this LAA will override the default Universally Administered Address or burned in address of the interface. For devices that do not support LAA: - a read will return all zeros. - any write attempt will return BADVALUE. For devices that support LAA: - valid values are 4000 0000 0000 to 4000 7fff ffff, and 0000 0000 0000 (a value of all zeros, causes interface to use the burned in address). - a set (write) with an invalid value, returns BADVALUE. - after a write, new values will only become active after the Token Ring interface has been closed and then opened again. - a read of ctIfLAA will always return same value as ifPhysAddress, except in the case where; o ctIfLAA has been set, but interface has not yet been closed and reopened, in this case the last set value is returned. Note that a read of ifPhysAddress will always return the physical address currently being used by the interface.
INT ctIfDuplex	1.3.6.1.4.1.52.4.3.3.2.1.1.5	INTEGER	read-write	Defines the duplex mode that the interface is set to operate in. For devices that do not support this capability: - a read will return standard(2). - any write attempt will return BADVALUE. - fast ethernet devices will report other(1).
INT ctIfCapability	1.3.6.1.4.1.52.4.3.3.2.1.1.6	INTEGER	read-only	Defines the cabability of the underlying hardware in supporting full duplex. This object will have a value of fullDuplex(3) if all hardware is capable of supporting full duplex operation.
INT ctIfRedundancy	1.3.6.1.4.1.52.4.3.3.2.1.1.7	INTEGER	read-only	Defines whether or not an interface supports redundancy.
ctIfPort	1.3.6.1.4.1.52.4.3.3.3
ctIfPortTable	1.3.6.1.4.1.52.4.3.3.3.1		not-accessible	This table defines an extension to the interface table.
ctIfPortEntry	1.3.6.1.4.1.52.4.3.3.3.1.1		not-accessible	This defines each conceptual row within the ctIfPortTable
INT ctIfPortPortNumber	1.3.6.1.4.1.52.4.3.3.3.1.1.1	INTEGER	read-only	This defines the port that is being described.
INT ctIfPortIfNumber	1.3.6.1.4.1.52.4.3.3.3.1.1.2	INTEGER	read-only	This defines the interface that the port being described is on.
OID ctIfPortType	1.3.6.1.4.1.52.4.3.3.3.1.1.3	OBJECT IDENTIFIER	read-only	Defines the specific type of the port (EPIM, TPIM). This is defined within ctron-oids.
INT ctIfPortLinkStatus	1.3.6.1.4.1.52.4.3.3.3.1.1.4	INTEGER	read-only	Defines the status of the port connection.
INT ctIfPortTrapStatus	1.3.6.1.4.1.52.4.3.3.3.1.1.5	INTEGER	read-write	Defines the trap forwarding status of the port. A value of (1) indicates that a trap WILL NOT be sent if the port goes down and a value of (2) which is the default value, indicates that a trap WILL be sent if the port goes down.
ctIfCp	1.3.6.1.4.1.52.4.3.3.4
ctCpTable	1.3.6.1.4.1.52.4.3.3.4.1		not-accessible	This table defines a Com Port Table.
ctCpEntry	1.3.6.1.4.1.52.4.3.3.4.1.1		not-accessible	This defines each conceptual row within the ctCPTable
INT ctComPort	1.3.6.1.4.1.52.4.3.3.4.1.1.1	INTEGER	read-only	This is the index into the Com Port Table and defines the Com Port that is being described. com1 = 1, com2 = 2
INT ctCpFunction	1.3.6.1.4.1.52.4.3.3.4.1.1.2	INTEGER	read-write	Defines the Com Port Function supported by that Com Port.
INT ctIfNum	1.3.6.1.4.1.52.4.3.3.4.1.1.3	INTEGER	read-only	This defines the interface that is being described. This is the same as ifIndex. This is only valid if ctCpFunction is SLIP or PPP, otherwise, 0
INT ctCpAdminStatus	1.3.6.1.4.1.52.4.3.3.4.1.1.4	INTEGER	read-write	The administrative state of the Com Port.
ctSNMP	1.3.6.1.4.1.52.4.3.3.5
INT enableSNMPv1	1.3.6.1.4.1.52.4.3.3.5.1	INTEGER	read-write	This object allows control over the SNMPv1 protocol. If set to a value of disable(1) then the SNMPv1 protocol will not be accepted by the device.
INT enableSNMPv2	1.3.6.1.4.1.52.4.3.3.5.2	INTEGER	read-write	This object allows control over the SNMPv2 protocol. If set to a value of disable(1) then the SNMPv2 protocol will not be accepted by the device.
INT enableSNMPv1Counter64	1.3.6.1.4.1.52.4.3.3.5.3	INTEGER	read-write	This object allows control over the SNMPv1 protocol agent. If set to a value of enable(2) then the SNMPv1 agent will return Counter64 objects using SNMPv2 syntax. If set to a value of disable(1) then the SNMPv1 agent will return any Counter64 objects as Counter32.
ctSonet	1.3.6.1.4.1.52.4.3.3.6
ctSonetTable	1.3.6.1.4.1.52.4.3.3.6.1		not-accessible	This table defines the Sonet table.
ctSonetEntry	1.3.6.1.4.1.52.4.3.3.6.1.1		not-accessible	This defines each conceptual row within the ctSonetTable.
INT ctSonetIfIndex	1.3.6.1.4.1.52.4.3.3.6.1.1.1	INTEGER	read-only	This defines the interface being described. It is the same as IfIndex.
INT ctSonetMediumType	1.3.6.1.4.1.52.4.3.3.6.1.1.2	INTEGER	read-write	This variable identifies whether a SONET or a SDH signal is used across this interface.
ctVirtual	1.3.6.1.4.1.52.4.3.3.7
ctVirtualIfTable	1.3.6.1.4.1.52.4.3.3.7.1		not-accessible	This table defines a Virtual IF Table.
ctVirtualIfEntry	1.3.6.1.4.1.52.4.3.3.7.1.1		not-accessible	This defines each conceptual row within the ctVirtualIfTable
INT ctVirtualIfIndex	1.3.6.1.4.1.52.4.3.3.7.1.1.1	INTEGER	read-only	Returns the virtual If Index.
INT ctVirtualIfPhysicalInterface	1.3.6.1.4.1.52.4.3.3.7.1.1.2	INTEGER	read-only	This value displays the physical interface that owns the virtual interface. This is the IfIndex from MIB-II.
OID ctVirtualIfType	1.3.6.1.4.1.52.4.3.3.7.1.1.3	OBJECT IDENTIFIER	read-only	This value displays the physical interface type.
INT ctVirtualIfNumPorts	1.3.6.1.4.1.52.4.3.3.7.1.1.4	INTEGER	read-only	This value displays the number of virtual ports.
ctVirtualIfPortTable	1.3.6.1.4.1.52.4.3.3.7.2		not-accessible	This table defines the Virtual Port types.
ctVirtualIfPortEntry	1.3.6.1.4.1.52.4.3.3.7.2.1		not-accessible	This defines each conceptual row within the ctVirtualIfPortTable.
INT ctVirtualIfPortIfIndex	1.3.6.1.4.1.52.4.3.3.7.2.1.1	INTEGER	read-only	Returns the virtual If Index.
INT ctVirtualIfPortNumber	1.3.6.1.4.1.52.4.3.3.7.2.1.2	INTEGER	read-only	The application port number of the port being described.
INT ctVirtualIfPortType	1.3.6.1.4.1.52.4.3.3.7.2.1.3	INTEGER	read-only	This defines the port type from ctron-oids.
INT ctVirtualIfPortVPI	1.3.6.1.4.1.52.4.3.3.7.2.1.4	INTEGER	read-only	This returns the Virtual Path Identifier value.
INT ctVirtualIfPortVCI	1.3.6.1.4.1.52.4.3.3.7.2.1.5	INTEGER	read-only	This returns the Virtual Channel Identifier value.
ctStats	1.3.6.1.4.1.52.4.3.3.8
ctStatsTable	1.3.6.1.4.1.52.4.3.3.8.1		not-accessible	This table defines the Stats table.
ctStatsEntry	1.3.6.1.4.1.52.4.3.3.8.1.1		not-accessible	This defines each StatsTable.
INT ctStatsIfIndex	1.3.6.1.4.1.52.4.3.3.8.1.1.1	INTEGER	read-only	This defines the interface being described. It is the same as IfIndex.
INT ctStatsIfEnable	1.3.6.1.4.1.52.4.3.3.8.1.1.2	INTEGER	read-write	This allows the interface to pass Token Ring MAC frames to the HOST for processing. When disabled, stats will not be gathered on the interface. Default is Enabled. For devices that do not support this capability any write attempt will return BADVALUE.
ctFramerConfig	1.3.6.1.4.1.52.4.3.3.9
ctIfHC	1.3.6.1.4.1.52.4.3.3.10
ctIfHCStatsTable	1.3.6.1.4.1.52.4.3.3.10.1		not-accessible	This table defines an extension to the interface table. This table consists of interface counters grouped together. For each counter type in the table their is a 32 bit counter and a 32 bit overflow counter. This effectively provides a method for counting up to 64 bits.
ctIfHCStatsEntry	1.3.6.1.4.1.52.4.3.3.10.1.1		not-accessible	This defines each conceptual row within the ctIfHCStatsTable. Entries in this table will exist for High Capacity Interfaces.
CTR ctIfInOctets	1.3.6.1.4.1.52.4.3.3.10.1.1.1	Counter	read-only	The total number of octets received on the interface, including framing characters.
CTR ctIfInOctetsOverflows	1.3.6.1.4.1.52.4.3.3.10.1.1.2	Counter	read-only	The number of times the associated ctIfInOctets counter has overflowed.
CTR ctIfInUcastPkts	1.3.6.1.4.1.52.4.3.3.10.1.1.3	Counter	read-only	The number of packets, delivered by this sub-layer to a higher (sub-)layer, which were not addressed to a multicast or broadcast address at this sub-layer.
CTR ctIfInUcastPktsOverflows	1.3.6.1.4.1.52.4.3.3.10.1.1.4	Counter	read-only	The number of times the associated ctIfInUcastPkts counter has overflowed.
CTR ctIfInMulticastPkts	1.3.6.1.4.1.52.4.3.3.10.1.1.5	Counter	read-only	The number of packets, delivered by this sub-layer to a higher (sub-)layer, which were addressed to a multicast address at this sub-layer. For a MAC layer protocol, this includes both Group and Functional addresses.
CTR ctIfInMulticastPktsOverflows	1.3.6.1.4.1.52.4.3.3.10.1.1.6	Counter	read-only	The number of times the associated ctIfInMulticastPkts counter has overflowed.
CTR ctIfInBroadcastPkts	1.3.6.1.4.1.52.4.3.3.10.1.1.7	Counter	read-only	The number of packets, delivered by this sub-layer to a higher (sub-)layer, which were addressed to a broadcast address at this sub-layer.
CTR ctIfInBroadcastPktsOverflows	1.3.6.1.4.1.52.4.3.3.10.1.1.8	Counter	read-only	The number of times the associated ctIfInBroadcastPkts counter has overflowed.
CTR ctIfOutOctets	1.3.6.1.4.1.52.4.3.3.10.1.1.9	Counter	read-only	The total number of octets transmitted out of the interface, including framing characters.
CTR ctIfOutOctetsOverflows	1.3.6.1.4.1.52.4.3.3.10.1.1.10	Counter	read-only	The number of times the associated ctIfOutOctets counter has overflowed.
CTR ctIfOutUcastPkts	1.3.6.1.4.1.52.4.3.3.10.1.1.11	Counter	read-only	The total number of packets that higher-level protocols requested be transmitted, and which were not addressed to a multicast or broadcast address at this sub-layer, including those that were discarded or not sent.
CTR ctIfOutUcastPktsOverflows	1.3.6.1.4.1.52.4.3.3.10.1.1.12	Counter	read-only	The number of times the associated ctIfOutUcastPkts counter has overflowed.
CTR ctIfOutMulticastPkts	1.3.6.1.4.1.52.4.3.3.10.1.1.13	Counter	read-only	The total number of packets that higher-level protocols requested be transmitted, and which were addressed to a multicast address at this sub-layer, including those that were discarded or not sent. For a MAC layer protocol, this includes both Group and Functional addresses.
CTR ctIfOutMulticastPktsOverflows	1.3.6.1.4.1.52.4.3.3.10.1.1.14	Counter	read-only	The number of times the associated ctIfOutMulticastPkts counter has overflowed.
CTR ctIfOutBroadcastPkts	1.3.6.1.4.1.52.4.3.3.10.1.1.15	Counter	read-only	The total number of packets that higher-level protocols requested be transmitted, and which were addressed to a broadcast address at this sub-layer, including those that were discarded or not sent.
CTR ctIfOutBroadcastPktsOverflows	1.3.6.1.4.1.52.4.3.3.10.1.1.16	Counter	read-only	The number of times the associated ctIfOutBroadcastPkts counter has overflowed.

RFC description

Computer Telephony Integration Framework extension MIB for telephony system management.

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Download CTIF-EXT-MIB

What Is CTIF-EXT-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description