Router User's Guide

C. Router CLI Commands, Codes, and Designations
C-6
September 2002 9128-A2-GB20-80
ip address
ip-addr subnet-mask
no ip address
[
ip-addr subnet-mask
]
Minimum Access Level:
Administrator
Command Mode:
config-if
(Ethernet),
config-subif
(Serial)
Assigns an IP address to the Ethernet interface or a Serial port sub-interface. No IP
addresses are assigned to interfaces or sub-interfaces by default.
Example:
ip address 132.53.4.2 255.255.255.255
Use the
no ip address
command to remove an IP address assigned to an interface or
sub-interface, and disable IP processing on the interface. The following rules apply:
Each sub-interface must be assigned to a different subnet.
A customer data IP address and subnet mask must be different from any IP address
used for management.
When an IP address and subnet mask are assigned to an interface or sub-interface,
the device automatically creates a routing table entry with the same destination
address and subnet mask, saying that IP addresses within that range are directly
reachable on the interface. This is the
interface route
.
If the maximum number of static routes have already been configured, you cannot
assign an IP address to the interface or sub-interface.
When an interface address and subnet mask are deleted, any routing entries with a
Next Hop Router address that fall within the interface’s address range are deleted
automatically.
ip-address
– IP address of the interface or sub-interface.
subnet-mask
– Subnet mask to be used when the IP address is being compared during
route table lookups. The subnet mask cannot be 0.0.0.0 and only contiguous, left-justified
subnet masks are allowed.
encapsulation
encapsulation-type encapsulation-protocol
Minimum Access Level:
Administrator
Command Mode:
config-if
(Serial)
Specifies the type of encapsulation on an interface.
Example:
encapsulation frame-relay ietf
encapsulation-type
– Specifies Frame Relay encapsulation on the serial interface. The
default is
frame-relay
.
encapsulation-protocol
– Specifies RFC 1490 encapsulation protocol on the serial
interface. The default is
ietf
.
Table C-4. Interface Commands (2 of 3)