3com 2924-PWR Manual De Usuario

C

HAPTER

 1: G

ETTING

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TARTED

The switch’s IP configuration is determined automatically using DHCP, or 
manually using values you assign.

By default the switch tries to configure its IP Information without 
requesting user intervention. It tries to obtain an IP address from a DHCP 
server on the network.

Default IP Address  If no DHCP server is detected, the switch will use 
its default IP information. The default IP address is 169.254.x.y, where x 
and y are the last two bytes of its MAC address.

If you use automatic IP configuration it is important that the IP address of 
the switch is static, otherwise the DHCP server can change the switch’s IP 
addresses and it will be difficult to manage. Most DHCP servers allow 
static IP addresses to be configured so that you know what IP address will 
be allocated to the switch. Refer to the documentation that accompanies 
your DHCP server.

You should use the automatic IP configuration method if:

■

your network uses DHCP to allocate IP information, or

■

flexibility is needed. If the switch is deployed onto a different subnet, it 
will automatically reconfigure itself with an appropriate IP address, 
instead of you having to manually reconfigure the switch.

If you use the automatic IP configuration method, you need to discover 
the automatically allocated IP information before you can begin 
management. Work through the “Viewing IP Information using the 
Console Port” on page 25.

When you configure the IP information manually, the switch remembers 
the information that you enter until you change it again.

You should use the Manual IP configuration method if:

■

You do not have a DHCP server on your network, or

■

You want to remove the risk of the IP address ever changing, or