eG Monitoring
 

Measures reported by RADLBHAStatusTest

Radware's new High Availability module supports two redundancy modes:

  • Switch mode

  • Service mode

The Service mode is a redundancy scenario involving 2 devices where each device is both the Active device for some VIPs (i.e., virtual servers) and the Backup device for other VIPs. In the event of a failure of one device, the other device temporarily assumes ownership of all VIPs. To support the Service mode, virtual servers need to be grouped into high availability service groups. In the Service mode, each load-balancing device will be configured as an active or backup device for every service group. This way, when a device fails, the service group for which the failed device is configured as the active device will automatically switch to the device that has been configured as its backup device. Once the active device comes back up, the service group will switch back to it.

At any give point in time, an administrator should know which service groups are enabled for HA, and whether a load balancer is the Active or the Backup device for a service group. This can be determined using the High Availability Status test.

This test auto-discovers service groups, and for each service group, reports whether that service group is enabled for HA or not. Additionally, the test also reveals the HA status of the monitored load balancer for that service group.

Outputs of the test : One set of results for each service group.

Descriptor of the test : Service Group

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
groupEnStatus Indicates whether or not this service group is enabled.   The values that this measure can report and their corresponding numeric values are as follows:

Measure Value Numeric Value
Yes 1
No 0

Note:

By default, this test reports one of the Measure Values listed in the table above to to indicate the status of the service group. In the graph of the measure however, the same is indicated using the corresponding numeric equivalents only.
groupStatus Indicates the current HA status of the target load balancer for this service group.   This measure can report one of the following values:

  • Init: HA is ON but cannot start

  • Backup: HA is ON and the device is in Backup/standby state

  • Master: HA is ON and the device is in Master state

  • Holdoff: HA is ON and currently in holdoff period

The numeric values that correspond to the measure values described above are as follows:

Measure Value Numeric Value
Init 0
Backup 1
Master 2
Holdoff 3

Note:

By default, this test reports one of the Measure Values listed in the table above to indicate the status of the service group. In the graph of the measure however, the same is indicated using the corresponding numeric equivalents only