A3COM-HUAWEI-LB-MIB

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Organization: Hangzhou H3C Technologies Co., Ltd.

Last Updated: 2010-12-01

Category: Vendor: H3C/HH3C, Web and Application Servers

Description: Monitors load-balancing virtual server pools, real-server health, and connection statistics on H3C devices.

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What Is A3COM-HUAWEI-LB-MIB?

A3COM-HUAWEI-LB-MIB is a vendor-specific MIB jointly attributed to 3Com and Huawei (via the H3C joint venture) that models basic load-balancing configuration and status on H3C devices, sitting under the h3cCommon enterprise subtree. It defines two small tables: h3cLBRealServerGroupTable (indexed by h3cLBRealServerGroupName, listing configured real-server groups) and h3cLBRealServerTable (indexed by group name plus h3cLBRealServerName, reporting each real server's h3cLBRealServerStatus — enabled, disabled, or slowdown — and its current h3cLBRealServerConnectNumber), plus a single h3cLBRealServerOverLoad notification carrying the group name, server name, and connection count when a real server is overloaded. This is a compact configuration/status MIB rather than a full load-balancing statistics MIB, so it's most useful for confirming which real servers are in service and detecting overload conditions rather than deep traffic analysis. It depends on A3COM-HUAWEI-OID-MIB for its h3cCommon OID anchor and is deployed on H3C load-balancing-capable switches and application delivery devices. Engineers commonly search for the A3COM-HUAWEI-LB-MIB MIB when integrating H3C load-balancer status into SNMP-based monitoring.

IPNetwork Monitor allows you to monitor SNMP objects defined in A3COM-HUAWEI-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 (3Com-Huawei joint venture) load-balancing-capable switches/appliances

Monitoring Examples

An operator polls h3cLBRealServerTable to check h3cLBRealServerStatus and h3cLBRealServerConnectNumber for each server in a group; a server reporting slowdown(3) status alongside a connection count near its configured ceiling would trigger the h3cLBRealServerOverLoad trap and indicate the pool needs additional capacity or traffic redistribution.

What Can Be Monitored

real-server group membership
real-server enabled/disabled/slowdown status
real-server current connection count
real-server overload notification

Imported Objects

From A3COM-HUAWEI-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 load-balancing switches/appliance 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	1.3.6.1.4.1.43.45.1.10.2.116			The private mib file includes the loadbalance information of the device.
h3cLBTables	1.3.6.1.4.1.43.45.1.10.2.116.1
h3cLBRealServerGroupTable	1.3.6.1.4.1.43.45.1.10.2.116.1.1		not-accessible	Real server group table for loadbalance.
h3cLBRealServerGroupEntry	1.3.6.1.4.1.43.45.1.10.2.116.1.1.1		not-accessible	An entry contains the information of the real server group.
STR h3cLBRealServerGroupName	1.3.6.1.4.1.43.45.1.10.2.116.1.1.1.1	DisplayString	accessible-for-notify	Real server group name.
h3cLBRealServerTable	1.3.6.1.4.1.43.45.1.10.2.116.1.2		not-accessible	Real server table for loadbalance.
h3cLBRealServerEntry	1.3.6.1.4.1.43.45.1.10.2.116.1.2.1		not-accessible	An entry contains the information of the real server.
STR h3cLBRealServerName	1.3.6.1.4.1.43.45.1.10.2.116.1.2.1.1	DisplayString	accessible-for-notify	Real server name.
INT h3cLBRealServerStatusEx	1.3.6.1.4.1.43.45.1.10.2.116.1.2.1.2	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	1.3.6.1.4.1.43.45.1.10.2.116.1.2.1.3	Integer32	read-only	The connection number of real server.
h3cLBTrap	1.3.6.1.4.1.43.45.1.10.2.116.2
h3cLBTrapPrex	1.3.6.1.4.1.43.45.1.10.2.116.2.0
NTF h3cLBRealServerOverLoad	1.3.6.1.4.1.43.45.1.10.2.116.2.0.1			This trap is sent when the real server is overloaded.

RFC description

H3C loadbalance MIB for real server group and connection monitoring.

Start monitoring H3C 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 A3COM-HUAWEI-LB-MIB