544 Command Reference for x230 Series Edge Switches C613-50055-01 REV A
AlliedWare Plusâ„¢ Operating System - Version 5.4.5-0.x
IP ADDRESSING AND PROTOCOL COMMANDS
IP
GRATUITOUS-ARP-LINK
ip gratuitous-arp-link
Overview This command sets the Gratuitous ARP time limit for all switchports. The time limit
restricts the sending of Gratuitous ARP packets to one Gratuitous ARP packet
within the time in seconds.
NOTE: This command specifies time between sequences of Gratuitous ARP packets, and
time between individual Gratuitous ARP packets occurring in a sequence, to allow
legacy support for older devices and interoperation between other devices that are not
ready to receive and forward data until several seconds after linkup.
Additionally, jitter has been applied to the delay following linkup, so Gratuitous ARP
packets applicable to a given port are spread over a period of 1 second so are not all
sent at once. Remaining Gratuitous ARP packets in the sequence occur after a fixed
delay from the first one.
Syntax
ip gratuitous-arp-link <0-300>
no ip gratuitous-arp-link
Default The default Gratuitous ARP time limit for all switchports is 8 seconds.
Mode Global Configuration
Usage Every switchport will send a sequence of 3 Gratuitous ARP packets to each VLAN
that the switchport is a member of, whenever the switchport moves to the
forwarding state. The first Gratuitous ARP packet is sent 1 second after the
switchport becomes a forwarding switchport. The second and third Gratuitous
ARP packets are each sent after the time period specified by the Gratuitous ARP
time limit.
Additionally, the Gratuitous ARP time limit specifies the minimum time between
the end of one Gratuitous ARP sequence and the start of another Gratuitous ARP
sequence. When a link is flapping, the switchport’s state is set to forwarding several
times. The Gratuitous ARP time limit is imposed to prevent Gratuitous ARP packets
from being sent undesirably often.
Examples To disable the sending of Gratuitous ARP packets, use the commands :
awplus# configure terminal
awplus(config)# ip gratuitous-arp-link 0
Parameter Description
<0-300> Specify the minimum time between sequences of Gratuitous ARPs and
the fixed time between Gratuitous ARPs occurring in a sequence, in
seconds.
0 disables the sending of Gratuitous ARP packets.
The default is 8 seconds.
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