Assigning an IP address to an Ethernet port

To assign an IP address to port 1/1/1, enter the following commands. 

device(config)# interface ethernet 1/1/1
device(config-if-1/1/1)# ip address 10.45.6.1 255.255.255.0

You also can enter the IP address and mask in CIDR format, as follows. 

device(config-if-1/1/1)# ip address 10.45.6.1/24

Syntax: no ip address ip- addr ip-mask [ ospf-ignore | ospf-passive | secondary ]

or

Syntax: no ip address ip-addr/mask-bits [ ospf-ignore | ospf-passive | secondary ]

The ospf-ignore and ospf-passive parameters modify the Layer 3 switch defaults for adjacency formation and interface advertisement. Use one of these parameters if you are configuring multiple IP subnet addresses on the interface but you want to prevent OSPF from running on some of the subnets:

  • ospf-passive - This option disables adjacency formation with OSPF neighbors. By default, when OSPF is enabled on an interface, the software forms OSPF router adjacencies between each primary IP address on the interface and the OSPF neighbor attached to the interface.
  • ospf-ignore - This option disables OSPF adjacency formation and also disables advertisement of the interface into OSPF. The subnet is completely ignored by OSPF.
NOTE
The ospf-passive option disables adjacency formation but does not disable advertisement of the interface into OSPF. To disable advertisement in addition to disabling adjacency formation, you must use the ospf-ignore option.

Use the secondary parameter if you have already configured an IP address within the same subnet on the interface.

NOTE
When you configure more than one address in the same subnet, all but the first address are secondary addresses and do not form OSPF adjacencies.
NOTE
All physical IP interfaces on Brocade FastIron Layer 3 devices share the same MAC address. For this reason, if more than one connection is made between two devices, one of which is a Brocade FastIron Layer 3 device, Brocade recommends the use of virtual interfaces. It is not recommended to connect two or more physical IP interfaces between two routers.
Parent topic: Configuring IP addresses