Specifying A Dedicated Ip Address; Changing An Ip Address - 3Com 3C990B-TX-M User Manual

5 Installing 3Com Advanced Server Features For Windows
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Specifying a Dedicated IP Address

Bidirectional load balancing requires that you specify a dedicated IP address for the load
balancing group. This address specifies a Network ID and a Host ID, and it must be unique
(not used elsewhere on the network). For example:
Class A
Class B
Class C
You can specify the dedicated IP address in the Create Group or Group Properties dialog
boxes. You cannot specify the bytes for the Network ID; they are fixed. Specify the bytes
for the Host ID for various classes of subnets as follows:
Class Byte 1
A 126
B 128 - 191
C 192 - 223

Changing an IP Address

If another device is using a bidirectional load balancing group's dedicated IP address, you
must change either the other device's IP address or that of the load balancing group. Use
the appropriate procedure below:
Changing the Other After you change the other device's address, restart receive load balancing as
Device's IP Address follows:
1 In the Load Balancing/RSL window, select the group that had the
2 Click Properties.
3 In the Properties dialog box, click OK.
4 In the Load Balancing/RSL window, click OK to exit the window and
Changing the Group's 1 In the Load Balancing/RSL window, select the group that has the
Dedicated IP 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 and
Byte 1 Byte 2
Network ID Host ID
125 24
Network ID
139 25
Network ID
193 26
Specify only bytes
2, 3, and 4 (the three rightmost boxes).
3 and 4 (the two rightmost boxes).
4 (the rightmost box).
duplicate address.
restart Windows.
duplicate address.
restart Windows.
Byte 3 Byte 4
1 253
Host ID
2 253
Host ID
3 253