Reference Guide

arp learn-enable
Enable ARP learning using gratuitous ARP.
S4820T
Syntax
arp learn-enable
Defaults Disabled
Command Modes CONFIGURATION
Command History
This guide is platform-specific. For command information about other platforms, refer to the
relevant FTOS Command Line Reference Guide .
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
Version 8.3.1.0 Introduced.
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 FTOS version 8.3.1.0, when a gratuitous ARP is received, FTOS installs an ARP
entry on all three CPUs.
arp retries
Set the number of ARP retries in case the system does not receive an ARP reply in response to an ARP request.
S4820T
Syntax
arp retries number
Parameters
number Enter the number of retries. The range is from 5 to 20. The default is 5.
Defaults 5
Command Modes CONFIGURATION
Command History
This guide is platform-specific. For command information about other platforms, refer to the
relevant FTOS Command Line Reference Guide .
The following is a list of the FTOS version history for this command.
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