User Manual

DynamicAccess Server Features 25
Troubleshooting a Load
Balancing Configuration
Use the troubleshooting tips in Table 2 to solve problems that may occur in a load
balancing configuration.
Changing Windows
2000 Property Settings
If you receive warnings about inconsistent property settings (for example, the
802.1p Support property) while creating a group, use the following procedure to
change a NIC property:
1 Right-click the My Computer icon and select Properties from the menu.
2 Click the Hardware tab, then click Device Manager.
3 Double-click Network Adapters.
4 Right-click on the name of the appropriate NIC and select Properties from the
menu.
5 Click the Advanced tab.
6 Select the appropriate property from the list (for example, 802.1p Support).
7 Use the scroll list to change the property value.
8 Exit the Device Manager.
Identifying Windows
2000 Miniport and LAN
Connections
DynamicAccess miniport connections and NIC Local Area Connections are listed in
the Network and Dial-up Connections window. If a group or VLAN is associated
with a miniport, the group name and VLAN name appear in the miniport icon
name.
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 2 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.
Cables may be disconnected, or there may be other
hardware problems. Reconnect or change the cables.
Correct any other hardware problems. Bidirectional
load balancing is restored after this type of failure
when applications create new connections and new
clients log in.
Reconnecting cables does not restore
load balancing.
Check the event log for a duplicate IP address. If
another device is using the dedicated IP address of a
load balancing group, change one of the IP addresses.
See “Changing an IP Address” for instructions.
Receive load balancing does not
function across a router.
Receive load balancing across a router is not
supported. Clients across the router cannot use
receive load balancing, but clients within the subnet
get higher throughput from receive load balancing.