AT-LB-MIB

All MIBs › AT-LB-MIB

Organization: Allied Telesis, Inc

Last Updated: 2006-06-28

Category: Vendor: Allied Telesis

Description: Manages load balancing policy, server pool health, and traffic distribution statistics on Allied Telesis load-balancing devices.

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What Is AT-LB-MIB?

AT-LB-MIB is a private Allied Telesis MIB for the load-balancing (LB) module found on Allied Telesis load-balancing appliances or switch modules, covering global load-balancing policy, resource-pool health, and virtual-balancer/server statistics. It exposes both configuration data (affinity/orphan timeouts, critical-reset behavior) and live operational counters such as current connection counts and resource pool totals. Its monitoring value is in tracking service/software-level health of the load-balancing function: current active connections, number of configured resource pools and virtual balancers, and timeout settings that affect session persistence, rather than physical hardware sensors. No specific external MIB dependency is evident beyond standard SNMP/SMI conventions used across Allied Telesis private MIBs. It is typically deployed on Allied Telesis load-balancing switches or appliances providing server-load-balancing (SLB) services in front of application server farms. Engineers can download the AT-LB-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in AT-LB-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

Allied Telesis load-balancing switch/appliance

Monitoring Examples

An administrator would poll lbShowGlobalTable/lbShowGlobalEntry, indexed by lbGlobalIndex, to read lbCurrentConnections alongside lbTotalResources, lbTotalResPools, and lbTotalVirtBals, giving a real-time view of load across the balancing service. A sudden spike in lbCurrentConnections without a corresponding increase in available resource pools could indicate the balancer is nearing capacity. lbAffinityTimeOut and lbOrphanTimeOut would be checked when troubleshooting session persistence or premature connection drops, and lbCriticalRst indicates whether the balancer is configured to send resets on critical resource exhaustion. Per-resource detail would be read from lbShowResTable/lbShowResEntry.

What Can Be Monitored

current active connections
total resource pools and virtual balancers
affinity/orphan session timeouts
critical-reset behavior
per-resource pool status

Imported Objects

From AT-SMI-MIB

DisplayStringUnsized
modules	OBJECT-IDENTITY

From IF-MIB

ifIndex

OBJECT-TYPE

From SNMPv2-SMI

IpAddress
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE

From SNMPv2-TC

DisplayString
TruthValue

OIDs

OID symbolic	OID numeric	Type	Access	Description
lb	1.3.6.1.4.1.207.8.4.4.4.104			This MIB file contains definitions of managed objects for the LB module.
lbShowGlobalTable	1.3.6.1.4.1.207.8.4.4.4.104.1		not-accessible	General configuration and status of all of the virtual balancers configured on the router.
lbShowGlobalEntry	1.3.6.1.4.1.207.8.4.4.4.104.1.1		not-accessible	An entry in the global table.
INT lbGlobalIndex	1.3.6.1.4.1.207.8.4.4.4.104.1.1.1	INTEGER	read-only	The index for the global table.
INT lbAffinityTimeOut	1.3.6.1.4.1.207.8.4.4.4.104.1.1.2	INTEGER	read-only	The length of time in seconds that a resource can be associated to a source IP address or Cookie after the connection has been closed.
INT lbOrphanTimeOut	1.3.6.1.4.1.207.8.4.4.4.104.1.1.3	INTEGER	read-only	The length of time in seconds that a connection can exist without having any data traversing it, before being declared an orphan and closed by the router.
INT lbCriticalRst	1.3.6.1.4.1.207.8.4.4.4.104.1.1.4	INTEGER	read-only	The ratio of total messages received from a resource that can be TCP RST messages represented as a percentage.
INT lbTotalResources	1.3.6.1.4.1.207.8.4.4.4.104.1.1.5	INTEGER	read-only	The total number of resources configured on the router.
INT lbTotalResPools	1.3.6.1.4.1.207.8.4.4.4.104.1.1.6	INTEGER	read-only	The total number of resource pools configured on the router.
INT lbTotalVirtBals	1.3.6.1.4.1.207.8.4.4.4.104.1.1.7	INTEGER	read-only	The total number of virtual balancers configured on the router.
INT lbCurrentConnections	1.3.6.1.4.1.207.8.4.4.4.104.1.1.8	INTEGER	read-only	Displays the current total number of connections to all resources in every resource pool on the router.
lbShowResTable	1.3.6.1.4.1.207.8.4.4.4.104.2		not-accessible	A list about the general information about for a given resource.
lbShowResEntry	1.3.6.1.4.1.207.8.4.4.4.104.2.1		not-accessible	An entry in the resource table.
INT lbResIndex	1.3.6.1.4.1.207.8.4.4.4.104.2.1.1	INTEGER	read-only	The index for the resource table.
STR lbResource	1.3.6.1.4.1.207.8.4.4.4.104.2.1.2	DisplayString	read-only	The name of the resource.
IP lbResIp	1.3.6.1.4.1.207.8.4.4.4.104.2.1.3	IpAddress	read-only	The IP address that a virtual balancer uses to accesses the resource.
INT lbResPort	1.3.6.1.4.1.207.8.4.4.4.104.2.1.4	INTEGER	read-only	The port that the service that the resource offer is accessed on.
STR lbResState	1.3.6.1.4.1.207.8.4.4.4.104.2.1.5	DisplayString	read-only	The current state of the resource, either UP, DOWN, or CLOSING.
INT lbResWeight	1.3.6.1.4.1.207.8.4.4.4.104.2.1.6	INTEGER	read-only	The weight that the virtual balancer will apply to the resource when selecting resources to try a connection to from a resource pool using either the WEIGHTEDLEASTCONNECT or WEIGHTEDLOTTERY selection algorithms.
INT lbResTotalConnections	1.3.6.1.4.1.207.8.4.4.4.104.2.1.7	INTEGER	read-only	The total number of successful connections that have been made to this resource while it has been in the UP state.
INT lbResCurrentConnections	1.3.6.1.4.1.207.8.4.4.4.104.2.1.8	INTEGER	read-only	The total number of connections currently made to the resource.
lbShowResPoolTable	1.3.6.1.4.1.207.8.4.4.4.104.3		not-accessible	A list about the general information about for a given resource pool.
lbShowResPoolEntry	1.3.6.1.4.1.207.8.4.4.4.104.3.1		not-accessible	An entry in the resource pool table.
INT lbResPoolIndex	1.3.6.1.4.1.207.8.4.4.4.104.3.1.1	INTEGER	read-only	The index for the resource pool table.
INT lbResPoolResourceIndex	1.3.6.1.4.1.207.8.4.4.4.104.3.1.2	INTEGER	read-only	The index for the resource table.
STR lbResPool	1.3.6.1.4.1.207.8.4.4.4.104.3.1.3	DisplayString	read-only	The name of the resource pool.
STR lbResPoolSelectionAlg	1.3.6.1.4.1.207.8.4.4.4.104.3.1.4	DisplayString	read-only	The selection algorithm that ius employed by this resource pool when a resource has been selected for a connection. The options are ROUNDROBIN, WEIGHTEDLEASTCONNECT, WEIGHTEDLOTTERY and FASTESTRESPONSE.
STR lbResPoolFailOnLast	1.3.6.1.4.1.207.8.4.4.4.104.3.1.5	DisplayString	read-only	Indicates whether or not the resource pool will fail a resource if it is the last resource in the resource pool.
STR lbResPoolTotalConnections	1.3.6.1.4.1.207.8.4.4.4.104.3.1.6	DisplayString	read-only	The total number of successful connections that have been made to the resources in the resource pool over the lifetime of the resource pool.
STR lbResPoolResources	1.3.6.1.4.1.207.8.4.4.4.104.3.1.7	DisplayString	read-only	The name of the resource that is currently allocated to the resource pool.
lbShowVirtBalTable	1.3.6.1.4.1.207.8.4.4.4.104.4		not-accessible	A list about the general information about for a given virtual balancer.
lbShowVirtBalEntry	1.3.6.1.4.1.207.8.4.4.4.104.4.1		not-accessible	An entry in the virtual balancer table.
INT lbVirtBalIndex	1.3.6.1.4.1.207.8.4.4.4.104.4.1.1	INTEGER	read-only	The index for the virtual balancer table.
STR lbVirtBal	1.3.6.1.4.1.207.8.4.4.4.104.4.1.2	DisplayString	read-only	The name of the virtual balancer.
IP lbVirtBalPublicIp	1.3.6.1.4.1.207.8.4.4.4.104.4.1.3	IpAddress	read-only	The IP address on which the virtual balancer will receive requests for the service provided by the resource pool associated with it.
INT lbVirtBalPublicPort	1.3.6.1.4.1.207.8.4.4.4.104.4.1.4	INTEGER	read-only	The port on which the virtual balancer will receive requests for the service provided by the resource pool associated with it.
STR lbVirtBalState	1.3.6.1.4.1.207.8.4.4.4.104.4.1.5	DisplayString	read-only	The current state of the virtual balancer, can either be UP, CLOSING, or DOWN.
STR lbVirtBalResPool	1.3.6.1.4.1.207.8.4.4.4.104.4.1.6	DisplayString	read-only	The name of the resource pool that is associated with the virtual balancer.
STR lbVirtBalType	1.3.6.1.4.1.207.8.4.4.4.104.4.1.7	DisplayString	read-only	The type of load balancer that this virtual balancer currently is, can be either TCP, HTTP, or ROUTE.
INT lbVirtBalTotalConnections	1.3.6.1.4.1.207.8.4.4.4.104.4.1.8	INTEGER	read-only	The total number of stateful connections currently running through this virtual balancer.
STR lbVirtBalAffinity	1.3.6.1.4.1.207.8.4.4.4.104.4.1.9	DisplayString	read-only	Indicates whether or not entries will be made in a virtual balancers' affinity table for each stateful connection to a resource in its' resource pool (TCP and ROUTE type) or for cookies received from clients (HTTP type).
STR lbVirtBalHttpErrorCode	1.3.6.1.4.1.207.8.4.4.4.104.4.1.10	DisplayString	read-only	A list of the HTTP server error status code added.
lbShowAffTable	1.3.6.1.4.1.207.8.4.4.4.104.5		not-accessible	A list of affinity tables for all configured virtual balancers on the router.
lbShowAffEntry	1.3.6.1.4.1.207.8.4.4.4.104.5.1		not-accessible	An entry in the affinity table.
INT lbAffIndex	1.3.6.1.4.1.207.8.4.4.4.104.5.1.1	INTEGER	read-only	The index for the affinity table.
STR lbAffVirtBal	1.3.6.1.4.1.207.8.4.4.4.104.5.1.2	DisplayString	read-only	The name of the virtual balancer whose affinity table is being displayed.
IP lbAffClientIp	1.3.6.1.4.1.207.8.4.4.4.104.5.1.3	IpAddress	read-only	The IP address that has affinity to the given resource.
STR lbAffCookie	1.3.6.1.4.1.207.8.4.4.4.104.5.1.4	DisplayString	read-only	The cookie that has affinity to the given resource.
STR lbAffResource	1.3.6.1.4.1.207.8.4.4.4.104.5.1.5	DisplayString	read-only	The name of the resource that the Client IP/Cookie has an affinity for.
INT lbAffExpiry	1.3.6.1.4.1.207.8.4.4.4.104.5.1.6	INTEGER	read-only	The amount of seconds left before this entry expires, and is removed from the affinity table.
lbShowConTable	1.3.6.1.4.1.207.8.4.4.4.104.6		not-accessible	A list about all of the TCP connections currently open to a given virtual balancer.
lbShowConEntry	1.3.6.1.4.1.207.8.4.4.4.104.6.1		not-accessible	An entry in the connections table.
INT lbConIndex	1.3.6.1.4.1.207.8.4.4.4.104.6.1.1	INTEGER	read-only	The index for the connections table.
STR lbConVirtBal	1.3.6.1.4.1.207.8.4.4.4.104.6.1.2	DisplayString	read-only	The name of the virtual balancer the listed connections are to.
IP lbConClientIp	1.3.6.1.4.1.207.8.4.4.4.104.6.1.3	IpAddress	read-only	The IP address of that originated the connection.
INT lbConPort	1.3.6.1.4.1.207.8.4.4.4.104.6.1.4	INTEGER	read-only	The port on the originating system that represents the other end of the connection.
STR lbConResource	1.3.6.1.4.1.207.8.4.4.4.104.6.1.5	DisplayString	read-only	The name of the resource that the connection has been made to.

RFC description

Vendor-private MIB for Allied Telesis devices; manages load-balancing functionality and status information.

Start monitoring Allied Telesis load-balancing switches/appliances 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 AT-LB-MIB

What Is AT-LB-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description