Ip Sticky-Arp - Cisco 4500M Command Reference Manual

ip sticky-arp

ip sticky-arp
To enable sticky ARP, use the ip sticky-arp command. Use the no form of this command to disable
sticky ARP.
Syntax Description
This command has no arguments or keywords.
Defaults
Enabled
Command Modes
Global configuration
Command History Release
12.1(12c)EW
Usage Guidelines
This command is supported on PVLANs only.
ARP entries that are learned on Layer3 PVLAN interfaces are sticky ARP entries. (You should display
and verify ARP entries on the PVLAN interface using the show arp command).
For security reasons, sticky ARP entries on the PVLAN interface do not age out. Connecting new
equipment with the same IP address generates a message and the ARP entry is not created.
Because the ARP entries on the PVLAN interface do not age out, you must manually remove ARP
entries on the PVLAN interface if a MAC address changes.
Unlike static entries, sticky-ARP entries are not stored and restored when you enter the reboot and
restart commands.
Examples
This example shows how to enable sticky ARP:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config) i p sticky-arp
Switch(config)# end
Switch#
This example shows how to disable sticky ARP:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config) n o ip sticky-arp
Switch(config)# end
Switch#
Catalyst4500 Series SwitchCiscoIOS Command Reference—Release 12.2(18)EW
2-152
ip sticky-arp
no ip sticky-arp
Modification
Support for this command was introduced on the Catalyst 4500 series switch.
Chapter2 Cisco IOS Commands for the Catalyst 4500 Series Switches
78-16201-01