ADC Telecommunications, Inc.
272 CHAPTER 14: CONFIGURING IP
Configuring IP Addresses
Configuring IP addresses involves setting values for the following
parameters:
■IP Address — Enter the IP address that you want to assign to the
selected physical interface (chassis/slot/interface) or the loopback
interface, which is a logical IP interface.
■Network Mask Address — Enter the network mask for that network.
You add an IP address to an interface using the ip address command within
interface configuration mode. If you specify an IP address that does not exist,
the ip address command creates the address, then enters configuration
mode for the IP interface; if the IP address already exists, it simply enters
configuration mode for the address. In either case, the IP address is then
displayed within the command prompt.
Within IP address configuration mode, you can configure RIP interface
parameters using the ip rip command and OSPF interface parameters us ing
the ip ospf command. You cannot configure RIP and OSPF interface
parameters for loopback interfaces.
The loopback interface that you can configure through the CLI differs from
the standard IP loopback interface, which has a fixed address of 127.0.0.1.
One of the uses of the configurable loopback interface is for opening
in-band connections (such as telnet sessions) to the Cuda 12000. Users can
specify the IP address of the loopback interface to open connections, thereby
eliminating the need to specify the IP address of a physical interface (such as
a CMTS interface). You can also configure static routes via the loopback
interface to act as backup routes to those configured via physical interfaces.
Note that the <c/s/i> of the interface appears as 131/1/1 in show command
output displays.