IP Configuration
IPv4 Management and Interfaces
Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 273
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Static
—Manually define a static IP address.
NOTE DHCP Option 12 (Host Name option) is supported when the device is
a DHCP client. If DHCP Option 12 is received from a DHCP server, it is saved
as the server’s host name. DHCP option 12 will not be requested by the
device. The DHCP server must be configured to send option 12, regardless
of what is requested in order to make use of this feature.
To configure a static IP address, configure the following fields.
•IP Address—Enter the IP address, and configure one of the following Mask
fields:
-Network Mask—Select and enter the IP address mask.
-Prefix Length—Select and enter the length of the IPv4 address prefix.
•Loopback Interface—Select to enable the configuration of a loopback
interface (see Loopback Interface).
•Loopback IP Address—Enter the IPv4 address of the loopback interface.
Enter one of the following fields for the loopback interface:
-Loopba ck Mask—Enter the mask of the IPv4 address of the loopback
interface.
-Prefix Length—Enter the prefix length of the IPv4 address of the
loopback interface.
•Administrative Default Gateway—Select User Defined and enter the
default gateway IP address, or select None to remove the selected default
gateway IP address from the interface.
•Operational Default Gateway—Displays the current default gateway
status.
NOTE If the device is not configured with a default gateway, it cannot
communicate with other devices that are not in the same IP subnet.
If a dynamic IP address is retrieved from the DHCP server, select those of the
following fields that are enabled:
•Renew IP Address Now—The device dynamic IP address can be renewed
any time after it is assigned by a DHCP server. Note that depending on your
DHCP server configuration, the device might receive a new IP address after
the renewal that requires setting the web-based configuration utility to the
new IP address.