ENTERASYS-TRANSMIT-QUEUE-MONITOR-MIB

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Organization: Enterasys Networks, Inc

Last Updated: 2013-02-25

Category: Technology: QoS, Vendor: Enterasys/Cabletron

Description: Enterasys Networks MIB for monitoring per-interface transmit queue depths and triggering threshold notifications.

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What Is ENTERASYS-TRANSMIT-QUEUE-MONITOR-MIB?

ENTERASYS-TRANSMIT-QUEUE-MONITOR-MIB is an Enterasys Networks proprietary MIB for monitoring per-port transmit queue depth and health on Enterasys switches, detecting ports whose egress queues have stalled. It exposes global thresholds (minimum rate, sample interval, logging/disable-port/ignore-pause thresholds) and a per-port table tracking consecutive stalled-queue events. Its core monitoring purpose is hardware/interface fault detection: identifying ports where traffic has stopped draining from the transmit queue, which can indicate a downstream congestion problem, a faulty link partner, or a hardware fault, and optionally auto-disabling the port to protect the rest of the switch. There is no explicit dependency on another standard MIB, though it complements the standard IF-MIB interface counters. It is deployed on Enterasys data-center or campus switches where head-of-line blocking or stuck ports need automated detection and remediation. Engineers can download the ENTERASYS-TRANSMIT-QUEUE-MONITOR-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in ENTERASYS-TRANSMIT-QUEUE-MONITOR-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

Enterasys/Extreme Networks managed switches

Monitoring Examples

An admin would poll etsysTxqMonitorPortTable/etsysTxqMonitorPortEntry for etsysTxqMonitorPortConsecutiveStalled counts per port to spot an interface whose transmit queue keeps stalling, often correlating with a downstream device that stopped accepting traffic. Comparing that against etsysTxqMonitorDisablePortThreshold reveals whether the port is about to be automatically shut down by the monitor feature. etsysTxqMonitorTrapStatus and etsysTxqMonitorLoggingThreshold settings determine whether such an event generates a trap or just a log entry, which the admin would check to ensure alerting is enabled.

What Can Be Monitored

per-port consecutive stalled-queue count
transmit queue minimum rate
sample interval
port auto-disable threshold
pause-frame ignore threshold
trap/logging status for stalls

Imported Objects

From ENTERASYS-MIB-NAMES

etsysModules

OBJECT-IDENTITY

From IF-MIB

ifIndex	OBJECT-TYPE
ifName	OBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Counter64
Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE

From SNMPv2-TC

TruthValue

How to Use in IPNetwork Monitor

Example using etsysTxqMonitorPortConsecutiveStalled OID:

Select an Enterasys Networks switch (legacy, later Extreme Networks) (per-port transmit queue stall detection) as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type etsysTxqMonitorPortConsecutiveStalled into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. The number of times the port has reached a stalled state consecutively. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter64-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
etsysTxqMonitorMIB	1.3.6.1.4.1.5624.1.2.99			This MIB module defines a portion of the SNMP MIB under the Enterasys Networks enterprise OID pertaining to the Transmit Queue Monitor MIB.
etsysTxqMonitorObjects	1.3.6.1.4.1.5624.1.2.99.1
etsysTxqMonitorNotifications	1.3.6.1.4.1.5624.1.2.99.1.0
NTF etsysTxqMonitorLoggingNotification	1.3.6.1.4.1.5624.1.2.99.1.0.1			This notification indicates that the port has exceeded its logging threshold.
NTF etsysTxqMonitorIgnorePauseNotification	1.3.6.1.4.1.5624.1.2.99.1.0.2			This notification indicates that the port has exceeded its ignore pause threshold.
NTF etsysTxqMonitorDisablePortNotification	1.3.6.1.4.1.5624.1.2.99.1.0.3			This notification indicates that the port has exceeded its disable port threshold.
etsysTxqMonitor	1.3.6.1.4.1.5624.1.2.99.1.1
I32 etsysTxqMonitorDownTime	1.3.6.1.4.1.5624.1.2.99.1.1.1	Integer32	read-write	The number of sample intervals that ports disabled by Transmit Queue Monitor may be held down. A value of zero will set the down time to forever.
I32 etsysTxqMonitorIgnorePauseTime	1.3.6.1.4.1.5624.1.2.99.1.1.2	Integer32	read-write	The number of sample intervals that ports ignoring RX pause by Transmit Queue Monitor may be held in this state. A value of zero will set the ignore RX pause time to forever.
I32 etsysTxqMonitorMinRate	1.3.6.1.4.1.5624.1.2.99.1.1.3	Integer32	read-write	The minimum rate of transmitted packets in a sampling interval.
I32 etsysTxqMonitorSampleInterval	1.3.6.1.4.1.5624.1.2.99.1.1.4	Integer32	read-write	The rate(in seconds) that the transmit queues will be checked for stalled buffers.
INT etsysTxqMonitorTrapStatus	1.3.6.1.4.1.5624.1.2.99.1.1.5	INTEGER	read-write	Trap status for transmit queue monitoring. When enabled, traps will be sent when each of enabled thresholds are reached.
I32 etsysTxqMonitorLoggingThreshold	1.3.6.1.4.1.5624.1.2.99.1.1.6	Integer32	read-write	Threshold levels for the number of sequential failures before triggering logging action. A value of 0 disables the action.
I32 etsysTxqMonitorIgnorePauseThreshold	1.3.6.1.4.1.5624.1.2.99.1.1.7	Integer32	read-write	Threshold levels for the number of sequential failures before triggering ignore pause action. A value of 0 disables the action.
I32 etsysTxqMonitorDisablePortThreshold	1.3.6.1.4.1.5624.1.2.99.1.1.8	Integer32	read-write	Threshold levels for the number of sequential failures before triggering disable port action. A value of 0 disables the action.
INT etsysTxqMonitorEnableState	1.3.6.1.4.1.5624.1.2.99.1.1.9	INTEGER	read-write	Transmit monitoring global state. If enabled(1), all ports will monitor the transmit queues for stalled ports. If a port is detected as stalled, the configured action will take effect.
etsysTxqMonitorPort	1.3.6.1.4.1.5624.1.2.99.1.2
etsysTxqMonitorPortTable	1.3.6.1.4.1.5624.1.2.99.1.2.1		not-accessible	A table containing the Transmit Queue Monitoring port state.
etsysTxqMonitorPortEntry	1.3.6.1.4.1.5624.1.2.99.1.2.1.1		not-accessible	An entry in the Port Table contains Transmit Queue Monitor operational status and state.
C64 etsysTxqMonitorPortConsecutiveStalledEx	1.3.6.1.4.1.5624.1.2.99.1.2.1.1.1	Counter64	read-only	The number of times the port has reached a stalled state consecutively.
C64 etsysTxqMonitorPortTotalStalled	1.3.6.1.4.1.5624.1.2.99.1.2.1.1.2	Counter64	read-only	The total number of times the port has reached a stalled state.
INT etsysTxqMonitorPortOperationalStatus	1.3.6.1.4.1.5624.1.2.99.1.2.1.1.3	INTEGER	read-only	The Transit Queue Monitor operational state. disabled(1) - Transmit queue monitoring is not running on this port. normal(2) - Transmit queue monitoring is currently monitoring this port and there are no stalled buffers. logging(3) - Transmit queue monitoring has detected a stalled buffer and is currently logging the condition. ignorePause(4) - Transmit queue monitoring has disabled the processing of received pause packets. down(5) Transmit queue monitoring has taken this port down.
T/F etsysTxqMonitorPortReset	1.3.6.1.4.1.5624.1.2.99.1.2.1.1.4	TruthValue	read-write	This value shall always read false. When set to true, this object will clear any actions currently being taken by the transmit queue monitor and the ports etsysTxqMonitorPortOperationalStatus will be set to normal if transmit queue monitoring is enabled otherwise disabled.
BIT etsysTxqMonitorPortCapabilities	1.3.6.1.4.1.5624.1.2.99.1.2.1.1.5	Bits	read-only	This object defines the capabilities the port supports for actions to be taken when a stalled port has been detected.
etsysTxqMonitorConformance	1.3.6.1.4.1.5624.1.2.99.2
etsysTxqMonitorGroups	1.3.6.1.4.1.5624.1.2.99.2.1
etsysTxqMonitorSettings	1.3.6.1.4.1.5624.1.2.99.2.1.1			A collection of objects for configuring and reporting Transmit Queue Monitoring.
etsysTxqMonitorNotificationGroup	1.3.6.1.4.1.5624.1.2.99.2.1.2			A collection of objects required for reporting exceeding transmit queue monitoring thresholds.
etsysTxqMonitorCompliances	1.3.6.1.4.1.5624.1.2.99.2.2
etsysTxqMonitorComplianceGroup	1.3.6.1.4.1.5624.1.2.99.2.2.1			The compliance statement for devices that support the Enterasys Transmit Queue Monitor MIB.

RFC description

MIB for Enterasys Networks switches that monitors transmit queue functionality on front-panel ports. Addresses queue management issues related to oversubscribed ports and spanning tree topology changes when flow control is enabled.

Start monitoring Enterasys Networks switch (legacy, later Extreme Networks) (per-port transmit queue stall detection) 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 ENTERASYS-TRANSMIT-QUEUE-MONITOR-MIB