Brocade BigIron RX Series Configuration Guide - Manual (Page 270)

192 BigIron RX Series Configuration Guide
53-1002484-04
Configuring ARP parameters
7
The example above displays the LP processed 50 packets every second and dropped any addtional
packets.
Syntax: show ip traffic arp
Clearing the rate limit for ARP packets
To clear the ARP port rate limit data on every port of the LP, enter a command such as the
following.
LP-1# clear ip traffic arp
Changing the ARP aging period
When the 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 The aging timer ensures that the ARP cache does not retain learned entries that are no
longer valid.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. The default ARP age is ten
minutes. On the device, you can change the ARP age to a value from 0 – 240 minutes. If you set the
ARP age to zero, aging is disabled and entries do not age out.
To globally change the ARP aging parameter to 20 minutes, enter the following command.
BigIron RX(config)# ip arp-age 20
Syntax: ip arp-age <num>
The <num> parameter specifies the number of minutes and can be from 0 – 240. The default is
10. If you specify 0, aging is disabled.
To override the globally configured IP ARP age on an individual interface, enter a command such as
the following at the interface configuration level.
BigIron RX(config-if-e1000-1/1)# ip arp-age 30
This column... Displays...
Interface The interface on the device.
Received Number of ARP packets received by the interface.
Processed Number of ARP packets processed by the interface.
Dropped (Rate-limited) Number of ARP packets dropped by the interface.
LP-1#show ip traffic arp
ARP Statistics
1400 total recv, 1400 req recv, 0 req sent
0 pending drop, 0 invalid source, 0 invalid dest
ARP Rate Limiting Statistics
Interface Received Processed Dropped(Rate-limted)
ethernet1/1 184200 700 183500
ethernet1/2 0 0 0
ethernet1/3 0 0 0
ethernet1/4 184200 700 183500