Reference Guide

632 | IPv4 Routing
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Command History
Usage Information
This timer is an exponential backoff timer. Over the specified period, the time between ARP requests
increases. This reduces the potential for the system to slow down while waiting for a multitude of ARP
responses.
Related
Commands
arp learn-enable
c e s z
Enable ARP learning via Gratuitous ARP.
Syntax
arp learn-enable
Defaults
Disabled
Command Modes
CONFIGURATION
Command History
Usage Information
In FTOS versions prior to 8.3.1.0, if a gratuitous ARP is received some time after an ARP request is
sent, only RP2 installs the ARP information. For example:
1 At time t=0 FTOS sends an ARP request for IP A.B.C.D
2 At time t=1 FTOS receives an ARP request for IP A.B.C.D
3 At time t=2 FTOS installs an ARP entry for A.B.C.D only on RP2.
Beginning with version 8.3.1.0, when a Gratuitous ARP is received, FTOS installs an ARP entry on all
3 CPUs.
arp retries
c e s z
Set the number of ARP retries and the time between retries in case the system does not receive an ARP
reply in response to an ARP request.
Syntax
arp retries number
Parameters
Defaults
5
Command Modes
CONFIGURATION
Version 8.3.11.1 Introduced for the Z9000
Version 8.3.8.0 Introduced for the S4810
show arp retries Display the configured number of ARP retries.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.1.0 Introduced
number
Enter the number of retries.
Range: 1 to 20.
Default: 5