3com 2226 PLUS Guia Do Utilizador

have not previously set a password, leave this field 
blank.

In New Password, type the password that you want to 
set.

In Confirm Password, retype the password you typed 
in step 3 to confirm.

 

Click Apply.

If you want to modify the admin password later on, 
follow the same procedure.

 for 

To enable devices on the network to communicate 
with the Switch, you need to assign an IP address to it 
— either by DHCP or by manually assigning a static IP 
address.

By default, the Switch performs automatic IP configu-
ration and assigns an IP address to itself. This is neces-
sary for the Discovery application to be able to 
connect to the Web interface.

When you power on the Switch for the first time, it 
automatically uses the default IP address 

169.254.x.y

, where 

x

 and

 y

 are the last two bytes of 

its MAC address.

To detect its IP information using the automatic con-
figuration process, the Switch goes through the fol-
lowing sequence of steps:

The Switch tries to configure itself with the default IP 
address 

169.254.x.y

, where 

x

 and 

y

 are converted 

from the last two bytes of its MAC address. 

For example, if the MAC address were 

08004E000102

, 

the IP address would be 

169.254.1.2

. This address is 

used if the Switch is operating in a standalone mode, 
or no other switches on the network have this IP 
address.

The Switch also assigns the subnet mask 255.255.0.0 
(default class B mask) to itself.

If this default IP address is already in use on the net-
work, then the Switch detects this, and increments 
the last byte of the MAC address by one to generate 
its IP address. 

The IP address would therefore become 

169.254.1.3

.

The Switch repeats step 2 until an unused IP address 
is found.