H3C-LB-MIB

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Organization: Hangzhou H3C Technologies Co., Ltd.

Last Updated: 2010-12-01

Category: Vendor: H3C/HH3C

Description: H3C MIB for server load balancing management including virtual servers, real servers, and health check status.

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What Is H3C-LB-MIB?

H3C-LB-MIB is an H3C enterprise MIB for the server load-balancing feature on H3C network devices, covering virtual server groups, real (backend) server pools, and their health/connection status. It exposes tables for real server groups and individual real servers, including server name, status, and current connection count, alongside a trap group for load-balancing events. Its monitoring emphasis is squarely on software service status: administrators use h3cLBRealServerStatus to determine whether each backend server is healthy/in-service, and h3cLBRealServerConnectNumber to track active connection load per server, which reveals overloaded or failed backend servers behind the load balancer. As a proprietary H3C feature MIB, it doesn't appear to depend on external load-balancing standards, though it may coexist with H3C's other virtual-server-related MIBs. It is deployed on H3C routers/switches or dedicated load-balancing appliances providing server load-balancing services in data center or enterprise environments. Network engineers evaluating or troubleshooting this functionality can download the H3C-LB-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in H3C-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

H3C router/switch with load-balancing feature
H3C load-balancing appliance

Monitoring Examples

An administrator would poll h3cLBRealServerTable, keyed by h3cLBRealServerName within a given h3cLBRealServerGroupName, to check h3cLBRealServerStatus for each backend server and h3cLBRealServerConnectNumber to see current connection load; a server showing a down status or a connection count near a configured maximum would indicate a real server that needs attention or additional capacity. The h3cLBTrap group would notify administrators automatically when a real server's status changes.

What Can Be Monitored

real server status (up/down)
real server connection count
real server group membership
load-balancing trap events

Imported Objects

From HUAWEI-3COM-OID-MIB

h3cCommon

OBJECT-IDENTITY

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE

From SNMPv2-TC

DisplayString

How to Use in IPNetwork Monitor

Example using h3cLBRealServerStatus OID:

Select an H3C router/switch/load-balancing appliance (server load balancing) 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 h3cLBRealServerStatus 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 real server's status — enabled (receiving new sessions), disabled (no traffic assigned), or slowdown (finishing existing sessions but not receiving new ones). 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 an INTEGER-type OID, Value bounds is the most useful condition here — trigger an alert if the value is 'disabled' or 'slowdown', since that means this real server is no longer receiving full traffic from the load balancer. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
h3cLB	1.3.6.1.4.1.2011.10.2.116			The private mib file includes the loadbalance information of the device.
h3cLBTables	1.3.6.1.4.1.2011.10.2.116.1
h3cLBRealServerGroupTable	1.3.6.1.4.1.2011.10.2.116.1.1		not-accessible	Real server group table for loadbalance.
h3cLBRealServerGroupEntry	1.3.6.1.4.1.2011.10.2.116.1.1.1		not-accessible	An entry contains the information of the real server group.
STR h3cLBRealServerGroupName	1.3.6.1.4.1.2011.10.2.116.1.1.1.1	DisplayString	accessible-for-notify	Real server group name.
h3cLBRealServerTable	1.3.6.1.4.1.2011.10.2.116.1.2		not-accessible	Real server table for loadbalance.
h3cLBRealServerEntry	1.3.6.1.4.1.2011.10.2.116.1.2.1		not-accessible	An entry contains the information of the real server.
STR h3cLBRealServerName	1.3.6.1.4.1.2011.10.2.116.1.2.1.1	DisplayString	accessible-for-notify	Real server name.
INT h3cLBRealServerStatusEx	1.3.6.1.4.1.2011.10.2.116.1.2.1.2	INTEGER	read-write	A list of real server status type. enabled: the real server is enabled. disabled: the real server is disabled, the loadbalance device does not assign any traffic to the real server. slowdown: the real server continues to process the existed session previously assigned to it, but the loadbalance device does not assign any new session to the real server.
I32 h3cLBRealServerConnectNumber	1.3.6.1.4.1.2011.10.2.116.1.2.1.3	Integer32	read-only	The connection number of real server.
h3cLBTrap	1.3.6.1.4.1.2011.10.2.116.2
h3cLBTrapPrex	1.3.6.1.4.1.2011.10.2.116.2.0
NTF h3cLBRealServerOverLoad	1.3.6.1.4.1.2011.10.2.116.2.0.1			This trap is sent when the real server is overloaded.

RFC description

Load balancing configuration and monitoring for real server groups.

Start monitoring H3C router/switch/load-balancing appliance (server load balancing) 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 H3C-LB-MIB