ip address
Configures an IP address on an interface.
Syntax
ip address
ip-address/mask
[
dynamic
|
ospf-ignore
|
ospf-passive
]
[
replace
]
ip address
{
ip-address
mask
|
ip-address/mask
}
[
secondary
]
no ip address
{
ip-address
mask
|
ip-address/mask
}
[
secondary
]
[
dynamic
|
ospf-ignore
|
ospf-passive
]
[
replace
]
no ip address
[
*
]
Parameters
- mask
- IP address or subnet mask length. The subnet mask can be in dotted decimal notation or in CIDR notation. For CIDR, enter a forward slash (/) between the ip address and the mask.
- ospf-ignore
- Disables adjacency formation with OSPF neighbors and disables advertisement of the interface to OSPF.
- ospf-passive
- Disables adjacency formation with OSPF neighbors but does not disable advertisement of the interface to OSPF.
- secondary
- Specifies that the configured address is a secondary IP address. If this keyword is omitted, the configured address is the primary IP address.
Modes
Interface configuration mode
Management interface configuration mode
Usage Guidelines
- Use this command to configure a primary or secondary IP address for a specific interface.
- You can also use this command to prevent OSPF from running on specified subnets. Multiple primary IP addresses are supported on an interface.
- You can use this command to configure a primary or secondary IP address for a management interface.
- For a management interface, only one primary IP address is supported. Secondary IP addresses are not supported.
- A primary IP address cannot overlap with a previously configured IP subnet.
- A primary IP address must be configured before you configure a secondary IP address in the same subnet.
- To remove the configured static or DHCP address, enter
no ip address. This resets the address to 0.0.0.0/0. - The
noform of the command removes a specific IP address from the interface. - The
* option to represent all IP addresses is only supported for the
noform of the command.
Examples
The following example configures a primary IP address on a specified Ethernet interface.
device(config)# interface ethernet 1/1/1 device(config-if-e1000-1/1/1)# ip address 10.1.1.1 255.255.255.0
The following example configures a primary IP address on a specified Ethernet interface using CIDR format.
device(config)# interface ethernet 1/3/1 device(config-if-e1000-1/1/1)# ip address 10.1.1.1/24
The following example replaces the primary IP address of an interface.
device# configure terminal device (config)# interface ethernet 1/1/21 device(config-if-e1000-1/1/21)# ip address 10.1.1.2/24 replace