ENTERASYS-LSNAT-MIB

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › ENTERASYS-LSNAT-MIB

Organization: Enterasys Networks, Inc

Last Updated: 2010-06-01

Category: Technology: VPN, Vendor: Enterasys/Cabletron

Description: Enterasys Networks MIB for configuring and monitoring Load Sharing NAT (LSNAT) for server load balancing via address translation.

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 ENTERASYS-LSNAT-MIB?

ENTERASYS-LSNAT-MIB is a vendor-specific Enterasys Networks MIB for configuring and monitoring Load Sharing NAT (LSNAT), a server load-balancing mechanism using address translation. It exposes counts of real servers, server farms, and virtual servers in use, along with detailed NAT binding statistics: current, high-water, deleted, total, and exhausted bindings, plus specific failure-reason counters such as no real servers available, no portmap port, and no FTP ALG. This gives visibility into the software status and capacity health of the load-balancing service, letting an admin spot when a virtual server's real servers have all become unreachable or when the binding table is running out of capacity. As a load-balancing/NAT feature it depends on the underlying real server/server-farm health it is translating traffic to. It is typically deployed on Enterasys Networks switches or appliances performing server load balancing for application front-ends. Engineers can download the ENTERASYS-LSNAT-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in ENTERASYS-LSNAT-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 Networks switch/load-balancing appliance

Monitoring Examples

etsysLsnatStatsBindingsCurrent and etsysLsnatStatsBindingsHigh let an admin track how many active NAT bindings a load-balanced server farm has versus its historical peak, while etsysLsnatStatsBindingsExhausted, etsysLsnatStatsBindingsNoReals, and etsysLsnatStatsBindingsNoPortmapPort report specific binding-failure counts. A rising etsysLsnatStatsBindingsNoReals count would indicate the real servers behind a virtual server (etsysLsnatStatsVserversUsed) have all become unreachable, causing new connections to be rejected, while etsysLsnatStatsRealsUsed and etsysLsnatStatsServerfarmsUsed give overall utilization of the load-balancing configuration's capacity.

What Can Be Monitored

  • active NAT bindings (current/high/total/deleted)
  • binding exhaustion and failure counts
  • real servers/server farms/virtual servers in use
  • reasons for binding failures (no reals, no portmap port, no FTP ALG)
Imported Objects

From ENTERASYS-MIB-NAMES

etsysModulesOBJECT-IDENTITY

From IF-MIB

InterfaceIndexOrZero

From INET-ADDRESS-MIB

InetAddress
InetAddressPrefixLength
InetAddressType
InetPortNumber
InetVersion

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Gauge32
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

DateAndTime
RowStatus
TruthValue

How to Use in IPNetwork Monitor

Example using etsysLsnatStatsBindingsDeleted OID:

Select an Enterasys Networks switch (legacy, later Extreme Networks)/load-balancing appliance (Load Sharing NAT) 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 etsysLsnatStatsBindingsDeleted into the Find box to locate it in the OID tree, then select it and click OK. This object contains the total number of LSNAT bindings that have been deleted. 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 Counter32-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

RFC description

Enterasys Load Sharing Network Address Translation (LSNAT) MIB for managing NAT and load distribution functions.

Start monitoring Enterasys Networks switch (legacy, later Extreme Networks)/load-balancing appliance (Load Sharing NAT) 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-LSNAT-MIB