3Com 3CR990SVR95 Troubleshooting a Load Balancing Configuration, Add 3Com server NICs to the group

Configuring Groups and VLANs for a Server NIC 71

2Add 3Com server NICs to the group.

Add at least one 3Com Gigabit Etherlink Server NIC and at least one 3Com EtherLink Server 10/100 PCI NIC to the group. Designate the Gigabit Etherlink Server NIC as the primary NIC.

See Adding NICs to a Group on page 66.

3Disable load balancing for the group.

See Disabling Load Balancing for a Group on page 69.

Troubleshooting a Load Balancing Configuration

Use the troubleshooting tips in Table 1 to solve problems that may occur in a load balancing configuration.

To access a database of technical information that can help you diagnose and solve NIC installation, configuration, and upgrade problems, go to:

http://knowledgebase.3com.com

Table 1 Troubleshooting Load Balancing In Windows

Symptom Tip

Receive load balancing fails to begin functioning.

Check the Group Properties to verify that the dedicated IP address has been entered. If no address appears in the Group Properties dialog box, enter one to enable receive load balancing.

Receive load balancing stops functioning.

Reconnecting cables does not restore load balancing.

Cables may be disconnected, or there may be other hardware problems. Reconnect or change the cables. Correct any other hardware problems. Bidirec- tional load balancing is restored after this type of failure when applications create new connections and new clients log in.

Check the event log for a duplicate IP address. If another device is using a load balancing group's dedicated IP address, change one of the IP addresses. See “Changing an IP Address” for instructions.