Reference v4.1.0 Instruction Manual

Network OS Command Reference 343

53-1003115-01

ip arp-aging-timeout

Sets how long an ARP entry stays in cache.

Synopsis ip arp-aging-timeout value

no ip arp-aging-timeout

Operands value Determines how long an ARP entry stays in cache.

For 1-gigabit, 10-gigabit, and 40-gigabit Ethernet interfaces, the range of

valid values is from 0 through 240 minutes. For virtual Ethernet interfaces,

the range is from 0 through 35790 seconds.

Defaults ip arp-aging-timeout is enabled and set to 10 minutes.

Command Modes Interface subtype configuration mode

Description Use this command to configure how long an ARP entry stays in cache before the cache refreshes.

Usage Guidelines When a Brocade device places an entry in the ARP cache, the device also starts an aging timer for

the entry. The aging timer ensures that the ARP cache does not retain learned entries that are no

longer valid. An entry can become invalid when the device with the MAC address of the entry is no

longer on the network.

The ARP age affects dynamic (learned) entries only, not static entries.

Enter no ip arp-aging-timeout command to disable aging so that entries do not age out.

Entering ip arp-aging-timeout 0 also disables aging.

Examples To set the IP ARP aging timeout value to 100 minutes for a specific 10-gigabit Ethernet interface:

switch(config)# interface tengigabitethernet 178/0/9

switch(conf-if-te-178/0/9)# ip arp-aging-timeout 100

To disable IP ARP aging for a specific 40-gigabit Ethernet interface:

switch(config)# interface fortygigabitethernet 1/3/1

switch(conf-if-fo-1/3/1)# no ip arp-aging-timeout