Cisco Cisco Web Security Appliance S160 User Guide

If an alert with the message “Failed to bootstrap the DNS cache” is generated when an appliance is 
rebooted, it means that the system was unable to contact its primary DNS servers. This can happen at 
boot time if the DNS subsystem comes online before network connectivity is established. If this message 
appears at other times, it could indicate network issues or that the DNS configuration is not pointing to 
a valid server.

If the feature key for the feature you are trying to access (via the web interface) has expired, please 
contact your Cisco representative or support organization.

Misconfiguration of failover groups might result in multiple master appliances or other failover 
problems. Diagnose failover problems using the testfailovergroup subcommand of the CLI 
failoverconfig command.

For example:

wsa.wga> failoverconfig

Currently configured failover profiles:

1.      Failover Group ID: 61

        Hostname: failoverV4P1.wga, Virtual IP: 10.4.28.93/28

        Priority: 100, Interval: 3 seconds

        Status: MASTER

Choose the operation you want to perform:

- NEW - Create new failover group.

- EDIT - Modify a failover group.

- DELETE - Remove a failover group.

- PREEMPTIVE - Configure whether failover is preemptive.

- TESTFAILOVERGROUP - Test configured failover profile(s)

[]> testfailovergroup

Failover group ID to test (-1 for all groups):

[]> 61

For deployments on virtual appliances, ensure that you have configured the interface/ virtual switch on 
the hypervisor to use promiscuous mode.