5 Installing 3Com Advanced Server Features For Windows48Specifying a Dedicated IP AddressBidirectional load balancing requires that you specify a dedicated IP address for the loadbalancing group. This address specifies a Network ID and a Host ID, and it must be unique(not used elsewhere on the network). For example:You can specify the dedicated IP address in the Create Group or Group Properties dialogboxes. You cannot specify the bytes for the Network ID; they are fixed. Specify the bytesfor the Host ID for various classes of subnets as follows:Changing an IP AddressIf another device is using a bidirectional load balancing group's dedicated IP address, youmust change either the other device’s IP address or that of the load balancing group. Usethe appropriate procedure below:Byte 1 Byte 2 Byte 3 Byte 4Class A Network ID Host ID125 24 1 253Class B Network ID Host ID139 25 2 253Class C Network ID Host ID193 26 3 253Class Byte 1 Specify only bytesA 126 2, 3, and 4 (the three rightmost boxes).B 128 - 191 3 and 4 (the two rightmost boxes).C 192 - 223 4 (the rightmost box).Changing the OtherDevice's IP AddressAfter you change the other device's address, restart receive load balancing asfollows:1 In the Load Balancing/RSL window, select the group that had theduplicate address.2 Click Properties.3 In the Properties dialog box, click OK.4 In the Load Balancing/RSL window, click OK to exit the window andrestart Windows.Changing the Group'sDedicated IP Address1 In the Load Balancing/RSL window, select the group that has theduplicate address.2 Click Properties.3 In the Properties dialog box, enter a new IP address and click OK.4 In the Load Balancing/RSL window, click OK to exit the window andrestart Windows.
