Basic Configuration
2-5
2
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 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 switch will immediately start
broadcasting service requests. IP is 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. If the BOOTP or DHCP server is slow to respond, the “ip dhcp restart
client” command can also be used to start broadcasting service requests. BOOTP
and DHCP values can include the IP address, subnet mask, and default gateway.
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>.
3. Type “end” to return to the Privileged Exec mode. Press <Enter>.
Console(config)#interface vlan 1 4-135
Console(config-if)#ip address 192.168.1.5 255.255.255.0 4-268
Console(config-if)#exit
Console(config)#ip default-gateway 192.168.1.254 4-269
Console(config)#
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