B
ASIC
IP C
ONFIGURATION
36-5
subnets. You can manually configure a specific IP address, or direct
the device to obtain an address from a BOOTP or DHCP server. Valid
IP addresses consist of four numbers, 0 to 255, separated by periods.
Anything outside this format will not be accepted by the configuration
program.
• An interface can have only one primary IP address, but can have many
secondary IP addresses. In other words, you will need to specify
secondary addresses if more than one IP subnet can be accessed via
this interface.
• If you select the bootp or dhcp option, IP is enabled but will not
function until a BOOTP or DHCP reply has been received. Requests
will be broadcast periodically by this device in an effort to learn its IP
address. (BOOTP and DHCP values can include the IP address,
default gateway, and subnet mask).
• You can start broadcasting BOOTP or DHCP requests by entering an
ip dhcp restart client command, or by rebooting the router.
Notes: 1. Only one VLAN interface can be assigned an IP address (the
default is VLAN 1). This defines the management VLAN, the
only VLAN through which you can gain management access to
the router. If you assign an IP address to any other VLAN, the
new IP address overrides the original IP address and this
becomes the new management VLAN.
2. Each VLAN group can be assigned its own IP interface
address. Therefore, if routing is enabled, you can manage the
router via any of these IP addresses.
3. Before you can change the primary IP address on an interface,
you must first clear the current address with the
no form of this
command.
Example
In the following example, the device is assigned an address in VLAN 1.
Console(config)#interface vlan 1
Console(config-if)#ip address 192.168.1.5 255.255.255.0
Console(config-if)#
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