3Com EtherLink 3C985B-SX, Руководство пользователя

Страница: 88 / 113

Specifying a Dedicated IP Address 87
Specifying a Dedicated IP Address
Bidirectional load balancing requires that you specify a
dedicated IP address for the load balancing group. This
address must be unique (not used elsewhere on the
network). For example:
You specify the dedicated IP address in the Create Group
or Group Properties dialog boxes. Byte 1 is fixed for each
class of subnet; you cannot specify it. Specify the other
bytes in the dedicated IP Address for various classes of
subnets as follows:
■
Class A — (Byte 1 = 1 – 126.) Specify only bytes 2, 3,
and 4 (the three rightmost boxes).
■
Class B — (Byte 1 = 128 – 191.) Specify only bytes 3
and 4 (the two rightmost boxes).
■
Class C — (Byte 1 = 192 – 223.) Specify only byte 4 (the
rightmost box).
Changing an IP Address
If another device is using a load balancing group's
dedicated IP address, you must change either the other
device’s IP address or that of the load balancing group.
Changing the Other Device's IP Address
1 Use Windows NT procedures to change the IP address
of the other device.
2 In the Load Balancing/RSL window, select the group
that had the duplicate address.
3 Click Properties .
4 In the Properties dialog box, click OK .
5 In the Load Balancing/RSL window, click OK to exit
the window and restart receive load balancing.
Network ID Host ID
Byte 1 Byte 2 Byte 3 Byte 4
Class A 125 24 1 253
Class B 139 25 2 253
Class C 193 26 3 253
Book Page 87 Monday, June 7, 1999 2:14 PM