There are several problems that may arise when implementing a load balancing pool or a CARP group. The two broad possibilities are:

• The load balancing pool or CARP group may not be functioning at all – for example, traffic might not be passing to or from the gateway or server pool, or the CARP firewalls may not be syncing
• The load balancing pool or CARP group is functioning, but performance is suboptimal – for example, the load balancing pool is not balancing, or the state table on the CARP group is not synchronized, resulting in lost connections when the group fails over to the backup firewall

If load balancing or CARP is not functioning at all, then there is a good possibility that it was improperly configured. Double-checking the configuration is recommended, and confirming the functioning of each element of the configuration is a good idea....