Cluster Maintenance; Recovering From A Failure; Recovering From A Temporary Outage; Table 37 Failure Modes - Aruba Networks PowerConnect W Clearpass 100 Software Deployment Manual

Cluster Maintenance

Use the Cluster Maintenance command link to access maintenance functions related to the cluster.
The maintenance commands that are available on this page will depend on the current state of the cluster as
well as which node you are logged into.
Some maintenance commands are only available on the secondary node. Other commands may change the active
state of the cluster. For this reason it is recommended that cluster maintenance should only be performed by
logging into a specific node in the cluster using its IP address.

Recovering From a Failure

From a cluster maintenance perspective, there are two kinds of failure:
A temporary outage is an event or condition that causes the cluster to failover to the secondary node.

Clearing the condition allows the cluster's primary node to resume operations in essentially the same
state as before the outage.
A hardware failure is a fault that to correct requires rebuilding or replacing one of the nodes of the

cluster.
The table below lists some system failure modes and the corresponding cluster maintenance that is
required.

Table 37 Failure Modes

Failure Mode
Software failure – system crash, reboot or hardware reset
Power failure
Network failure – cables or switching equipment
Network failure – appliance network interface
Hardware failure – other internal appliance hardware
Data loss or corruption

Recovering From a Temporary Outage

Use this procedure to repair the cluster and return to a normal operating state:
1. This procedure assumes that the primary node has experienced a temporary outage, and the cluster has
failed over to the secondary node.
2. Ensure that the primary node and the secondary node are both online.
3. Log into the secondary node. (Due to failover, this node will be assigned the cluster's virtual IP address.)
4. Click Cluster Maintenance, and then click the Recover Cluster command link.
436 | High Availability Services
Maintenance
Temporary outage
Temporary outage
Temporary outage
Hardware failure
Hardware failure
Hardware failure
ClearPass Guest 3.9 | Deployment Guide