Configuration Guide User guide

FastIron Configuration Guide 1187

53-1002494-02

Adding a static ARP entry

NOTE

Adding a static ARP entry is supported on FastIron X Series and Brocade FCX Series devices. It is not

supported on FastIron WS Series devices.

Static entries are useful in cases where you want to pre-configure an entry for a device that is not

connected to the Brocade device, or you want to prevent a particular entry from aging out. The

software removes a dynamic entry from the ARP cache if the ARP aging interval expires before the

entry is refreshed. Static entries do not age out, regardless of whether the Brocade device receives

an ARP request from the device that has the entry address. The software places a static ARP entry

into the ARP cache as soon as you create the entry.

To add a static ARP entry, enter a command such as the following at the global CONFIG level of the

CLI.

Brocade(config)#arp 1 209.157.22.3 aaaa.bbbb.cccc ethernet 3

This command adds a static ARP entry that maps IP address 209.157.22.3 to MAC address

aaaa.bbbb.cccc. The entry is for a MAC address connected to Brocade port 3.

Syntax: [no] arp <num> <ip-addr> <mac-addr> ethernet <port>

The <num> variable specifies the entry number. You can specify a number from 1 up to the

maximum number of static entries allowed on the device. You can allocate more memory to

increase this amount. To do so, enter the system-max ip-static-arp <num> command at the global

CONFIG level of the CLI.

The <ip-addr> variable specifies the IP address of the device that has the MAC address of the

entry.

The <mac-addr> variable specifies the MAC address of the entry.

The ethernet <port> parameter specifies the port number attached to the device that has the MAC

address of the entry. Specify the <port> variable in one of the following formats:

Specify the port variable in one of the following formats:

• FWS, FCX, and ICX stackable switches – stack-unit/slotnum/portnum

• FSX 800 and FSX 1600 chassis devices – slotnum/portnum

• ICX devices – slotnum/portnum

• FESX compact switches – portnum

The clear arp command clears learned ARP entries but does not remove any static ARP entries.