CTRON-PRIORITY-EXTENSIONS-MIB

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Category: Quality of Service, Vendor: Cabletron/Enterasys

Description: Extends Cabletron traffic priority management with additional classification criteria and queue mappings.

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What Is CTRON-PRIORITY-EXTENSIONS-MIB?

CTRON-PRIORITY-EXTENSIONS-MIB is a Cabletron (later Enterasys) vendor MIB extending traffic priority management on Cabletron switches, adding MAC-based classification on top of standard queue prioritization. It exposes configuration and status data per slot/interface: the number of transmit priority queues, MAC-based priority classification enable status, and MAC address table entries with associated packet-type classification. Its monitoring role is software/configuration status oriented: administrators check ctPriorityExtNumTXQueues and ctPriorityExtMACStatus to confirm priority queuing and MAC-based classification are active as configured, and use ctPriorityExtNumMACEntries versus its maximum to see if the classification table is nearing capacity. It extends Cabletron's core priority/queueing model and implicitly relates to standard 802.1p/802.1Q priority concepts, though it is not a direct extension of an IETF MIB. It is deployed on Cabletron/Enterasys switches in enterprise LANs using MAC-based traffic prioritization for QoS differentiation, where administrators reference the CTRON-PRIORITY-EXTENSIONS-MIB OID tree when polling the classification tables.

IPNetwork Monitor allows you to monitor SNMP objects defined in CTRON-PRIORITY-EXTENSIONS-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

Monitoring Examples

An admin would check ctPriorityExtTXQueueTable's ctPriorityExtNumTXQueues per ctPriorityExtSlotNum/ctPriorityExtInterfaceNum to confirm the expected number of priority queues is provisioned on a given port. ctPriorityExtMACStatus and ctPriorityExtNumMACEntries versus ctPriorityExtMaxNumMACEntries would be polled to detect if MAC-based classification is enabled and whether the table is approaching its capacity limit, which would silently drop new classification entries if exceeded. ctPriorityExtMaxNumPktTypesPerMACEntry would be checked when troubleshooting why a MAC entry isn't classifying all expected packet types.

What Can Be Monitored

transmit priority queue count per interface
MAC-based priority classification status
MAC classification table entry count vs. maximum
packet types classified per MAC entry

Imported Objects

From CTRON-MIB-NAMES

ctPriorityExt

OBJECT-IDENTITY

From RFC-1212

OBJECT-TYPE

From RFC1213-MIB

PhysAddress

OIDs

OID symbolic	OID numeric	Type	Access	Description
ctPriorityExtTxQueue	1.3.6.1.4.1.52.4.1.2.14.1
ctPriorityExtTXQueueTable	1.3.6.1.4.1.52.4.1.2.14.1.1		not-accessible	This table provides information pertaining to the number of physical transmit queues per interface.
ctPriorityExtTXQueueEntry	1.3.6.1.4.1.52.4.1.2.14.1.1.1		not-accessible	Specifies the number of transmit queues for this interface.
INT ctPriorityExtSlotNum	1.3.6.1.4.1.52.4.1.2.14.1.1.1.1	INTEGER	read-only	The slot num of the device that the interface is located on.
INT ctPriorityExtInterfaceNum	1.3.6.1.4.1.52.4.1.2.14.1.1.1.2	INTEGER	read-only	The interface number for which the information is requested. This is equal to the MIB-II ifIndex.
INT ctPriorityExtNumTXQueues	1.3.6.1.4.1.52.4.1.2.14.1.1.1.3	INTEGER	read-only	The number of physical transmit queues for the requested interface.
ctPriorityExtMACConfig	1.3.6.1.4.1.52.4.1.2.14.2
INT ctPriorityExtMACStatus	1.3.6.1.4.1.52.4.1.2.14.2.1	INTEGER	read-write	Defines the status of the priority packet forwarding based on MAC address. Setting ctIfPriorityExtMACStatus to a value of disable(2), disables the forwarding of packets based on priority table information. All information remains in existence but is not considered in the forwarding decision.
INT ctPriorityExtNumMACEntries	1.3.6.1.4.1.52.4.1.2.14.2.2	INTEGER	read-only	The number of active entries in the ctPriorityExtMACTable.
INT ctPriorityExtMaxNumMACEntries	1.3.6.1.4.1.52.4.1.2.14.2.3	INTEGER	read-only	The maximum number of entries allowed in the ctPriorityExtMACTable.
INT ctPriorityExtMaxNumPktTypesPerMACEntry	1.3.6.1.4.1.52.4.1.2.14.2.4	INTEGER	read-only	The maximum number of packet types that can be asssociated with any one MAC address in the ctPriorityExtMACTable
ctPriorityExtMACTable	1.3.6.1.4.1.52.4.1.2.14.2.5		not-accessible	This table provides the ability to specify priority based on the MAC addresses encoded in a packet. There are several possible permutations achieveable via this table. Priorities in this table may be based on the following criteria: Destination address and specific packet type and VLAN ID Destination address and specific packet type Destination address Source address and specific packet type and VLAN ID Source address and specific packet type Source address Destination or source address and specific packet type and VLAN ID Destination or source address and specific packet type Destination or source address Depending on the values set in the table which of these criteria will be used for any given packet. If any given relationship can not be created the set will fail with a BAD-VALUE error.
ctPriorityExtMACEntry	1.3.6.1.4.1.52.4.1.2.14.2.5.1		not-accessible	Describes a particular MAC address priority entry.
PHY ctPriorityExtMACAddr	1.3.6.1.4.1.52.4.1.2.14.2.5.1.1	PhysAddress	read-only	The MAC address which will have a priority associated with it as specified by ctPriorityExtMACPriority.
INT ctPriorityExtAddrType	1.3.6.1.4.1.52.4.1.2.14.2.5.1.2	INTEGER	read-only	The type of MAC address which will have priority associated with it as specified by ctPriorityExtMACPriority.
INT ctPriorityExtMACPktType	1.3.6.1.4.1.52.4.1.2.14.2.5.1.3	INTEGER	read-only	The packet type associated with a particular MAC address, specified by ctPriorityExtMACAddr, which will have priority associated with it as specified by ctPriorityExtMACPriority. A value of 1 indicates that this entry pertains to all packet types. A single value in the range of 0x0600..0xFFFF indicates that this entry only pertains to that particular packet type.
INT ctPriorityExtMACVlanId	1.3.6.1.4.1.52.4.1.2.14.2.5.1.4	INTEGER	read-write	A set of 65335 (0xFFFF) causes the priority value specified in ctPriorityExtMACPriority to apply to all packets matching the criteria specified by ctPriorityExtMACAddr, ctPriorityExtAddrType, and ctPriorityExtMACPktType. Any value between 1 and 4095 is a valid VLAN ID (IEEE 802.1q) and causes ctPriorityExtMACPriority to only apply to packets that are of matching the above criteria and that are members of the IEEE 802.1q VLAN specified by the value set.
INT ctPriorityExtMACPriority	1.3.6.1.4.1.52.4.1.2.14.2.5.1.5	INTEGER	read-write	A set of delete(100) will delete this row from the ctPriorityExtMACTable. A set of priority(1-8) will either create a row in the ctPriorityExtMACTable with the specified priority or modify an existing entry with the newly specified priority.
ctPriorityExtPktTypeConfig	1.3.6.1.4.1.52.4.1.2.14.3
INT ctPriorityExtPktTypeStatus	1.3.6.1.4.1.52.4.1.2.14.3.1	INTEGER	read-write	Defines the status of the priority packet forwarding based exclusively on packet type. Setting ctIfPriorityPktTypeExtStatus to a value of disable(2) disables the forwarding of packets based on priority table information. All information remains in existence but is not considered in the forwarding decision.
INT ctPriorityExtNumPktTypeEntries	1.3.6.1.4.1.52.4.1.2.14.3.2	INTEGER	read-only	The number of active entries in the ctPriorityExtPktTypeTable.
INT ctPriorityExtMaxNumPktTypeEntries	1.3.6.1.4.1.52.4.1.2.14.3.3	INTEGER	read-only	The maximum number of entries allowed in the ctPriorityExtPktTypeTable.
ctPriorityExtPktTypeTable	1.3.6.1.4.1.52.4.1.2.14.3.4		not-accessible	This table provides the ability to specify priority based on the packet type encoded in a packet. Priorities in this table may be based on the following criteria: Packet type and VLAN ID Packet type If any given relationship can not be created the set will fail with a BAD-VALUE error.
ctPriorityExtPktTypeEntry	1.3.6.1.4.1.52.4.1.2.14.3.4.1		not-accessible	Describes a particular packet type priority entry.
INT ctPriorityExtPktType	1.3.6.1.4.1.52.4.1.2.14.3.4.1.1	INTEGER	read-only	The packet type which will have priority associated with it as specified by ctPriorityExtPktTypePriority. A value of 1 indicates that this entry pertains to all packet types. A single value in the range of 0x0600..0xFFFF indicates that this entry only pertains to that particular packet type.
INT ctPriorityExtPktTypeVlanId	1.3.6.1.4.1.52.4.1.2.14.3.4.1.2	INTEGER	read-write	A set of 65535 (0xFFFF) causes the priority value specified in ctPriorityExtPktTypePriority to apply to all packets of the type specified by ctPriorityExtPktType. Any value between 1 and 4095 is a valid VLAN ID (IEEE 802.1q) and causes ctPriorityExtPktTypePriority to only apply to packets that are of ctPriorityExtPktType type and are members of the IEEE 802.1q VLAN specified by the value set.
INT ctPriorityExtPktTypePriority	1.3.6.1.4.1.52.4.1.2.14.3.4.1.3	INTEGER	read-write	A set of delete(100) will delete this row from the ctPriorityExtPriorityTypeTable. A set of priority(1-8) will either create a row in the ctPriorityExtPriorityTypeTable with the specified priority or modify an existing entry with the newly specified priority.
ctPriorityExtPortConfig	1.3.6.1.4.1.52.4.1.2.14.4
INT ctPriorityExtPortStatus	1.3.6.1.4.1.52.4.1.2.14.4.1	INTEGER	read-write	Defines the status of the priority packet forwarding based on receive port. Setting ctIfPriorityExtPortStatus to a value of disable(2), disables the forwarding of packets based on priority table information. All information remains in existence but is not considered in the forwarding decision.
ctPriorityExtPortTable	1.3.6.1.4.1.52.4.1.2.14.4.2		not-accessible	This table provides information pertaining to the priority associated with a receive port.
ctPriorityExtPortEntry	1.3.6.1.4.1.52.4.1.2.14.4.2.1		not-accessible	Specifies the priority associated with a specific physical interface.
INT ctPriorityExtPortSlotNum	1.3.6.1.4.1.52.4.1.2.14.4.2.1.1	INTEGER	read-only	The slot num of the device that the interface is located on.
INT ctPriorityExtPortInterfaceNum	1.3.6.1.4.1.52.4.1.2.14.4.2.1.2	INTEGER	read-only	The interface number for which the information is requested.
INT ctPriorityExtPortPriority	1.3.6.1.4.1.52.4.1.2.14.4.2.1.3	INTEGER	read-write	A set of priority(1-8) will modify an existing entry with the newly specified priority. Entries cannot be deleted from this table.
INT ctPriorityExtFwdInboundPriority	1.3.6.1.4.1.52.4.1.2.14.4.2.1.4	INTEGER	read-write	This controls whether a packet that is received with a priority tag is forwarded with the priority encoded in the tag or the default priority of the port. A value of enable(1) means the packet will be forwarded with the priority encoded in the tag. A value of disable(2) means the packet will be given the default priority of the port it was received on.

RFC description

Cabletron Systems Priority Extensions MIB; defines objects for priority queue management and traffic prioritization in Cabletron switches.

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Download CTRON-PRIORITY-EXTENSIONS-MIB

What Is CTRON-PRIORITY-EXTENSIONS-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description