Installation guide

Basic Configuration

2-5

Before you can assign an IP address to the switch, you must obtain the following

information from your network administrator:

• IP address for the switch

• Default gateway for the network

• Network mask for this network

To assign an IP address to the switch, complete the following steps:

1. From the Privileged Exec level global configuration mode prompt, type

“interface vlan 1” to access the interface-configuration mode. Press <Enter>.

2. Type “ip address ip-address netmask,” where “ip-address” is the switch IP

address and “netmask” is the network mask for the network. Press <Enter>.

3. Type “exit” to return to the global configuration mode prompt. Press <Enter>.

4. To set the IP address of the default gateway for the network to which the switch

belongs, type “ip default-gateway gateway,” where “gateway” is the IP address

of the default gateway. Press <Enter>.

Dynamic Configuration

If you select the “bootp” or “dhcp” option, the system will immediately start

broadcasting service requests. IP will be enabled but will not function until a BOOTP

or DHCP reply has been received. Requests are broadcast every few minutes using

exponential backoff until IP configuration information is obtained from a BOOTP or

DHCP server. (BOOTP and DHCP values can include the IP address, subnet mask,

and default gateway.)

Note that the “ip dhcp restart” command can also be used to start broadcasting

service requests to obtain address assignments through BOOTP or DHCP. It may be

necessary to use this command when DHCP is configured on a VLAN, and the

member ports which were previously shut down are now enabled.

If the “bootp” or “dhcp” option is saved to the startup-config file (step 6), then the

switch will start broadcasting service requests as soon as it is powered on.

To automatically configure the switch by communicating with BOOTP or DHCP

address allocation servers on the network, complete the following steps:

1. From the Global Configuration mode prompt, type “interface vlan 1” to access

the interface-configuration mode. Press <Enter>.

2. At the interface-configuration mode prompt, use one of the following commands:

• To obtain IP settings via DHCP, type “ip address dhcp” and press <Enter>.

• To obtain IP settings via BOOTP, type “ip address bootp” and press <Enter>.

Console(config)#interface vlan 1

Console(config-if)#ip address 192.168.1.5 255.255.255.0

Console(config-if)#exit

Console(config)#ip default-gateway 192.168.1.254

Console(config)#