Command Line Reference Guide

IPv4 Routing | 609
Defaults
Not configured.
Command Modes
CONFIGURATION
Command
History
Usage
Information
You cannot use Class D or Class E IP addresses or zero IP address (0.0.0.0) when creating a static
ARP. Zero MAC addresses (00:00:00:00:00:00) are also invalid.
Related
Commands
arp learn-enable
c e s
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
Set the number of ARP retries in case the system does not receive an ARP reply in response to an ARP
request.
Syntax
arp retries number
Parameters
Version 8.1.1.0 Introduced on E-Series ExaScale
Version 7.6.1.0 Introduced on S-Series
Version 7.5.1.0 Introduced on C-Series
pre-Version 6.2.1.1 Introduced on E-Series
clear arp-cache Clear dynamic ARP entries from the ARP table.
show arp Display ARP table.
Version 8.3.1.0 Introduced
number
Enter the number of retries.
Range: 5 to 20.
Default: 5