Allied Telesis AT-S39 - Manual (Page 250)

Section III: Web Browser Management
250
The default password for Operator access is “operator”. A
password can be from 0 to 20 alphanumeric characters.
Passwords are case-sensitive.
Caution
You should not use spaces or special characters, such as asterisks (*)
and exclamation points (!), in a password if you will be managing the
switch from a web browser. Many web browsers cannot handle
special characters in passwords.
IP address
This parameter specifies the IP address of the switch. You must
assign an IP address if you want the switch to function as the
Master switch of an enhanced stack. (Slave switches do not need
and IP address.) You must also assign it an IP address if it will not
be part of an enhanced stack and you want to be able to manage
it remotely using Telnet or a web browser. The IP address must be
entered in the format: xxx.xxx.xxx.xxx. The default value is 0.0.0.0.
Subnet mask
This parameter specifies the subnet mask for the switch. You must
specify a subnet mask if you assigned an IP address to the switch.
The mask address must be entered in the format: xxx.xxx.xxx.xxx.
The default value is 0.0.0.0.
Gateway address
This parameter specifies the default router’s IP address. This
address is required if you intend to remotely manage the switch
from a management station that is separated from the switch by
a router. The gateway address must be entered in the format:
xxx.xxx.xxx.xxx. The default value is 0.0.0.0.
4. After you have set the parameters, click Apply. Your changes are not
stored by the switch until you click Apply.
Note
A change to any of the above parameters, including the IP address
and subnet mask, is immediately activated on the switch.
A change to the IP address of the switch will result in the loss of the
remote management session. You can restart the management
session using the switch’s new IP address.