Ip Sticky-Arp - Cisco Catalyst 4500 Series Command Reference Manual

Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches

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 mode
Command History Release
12.1(12c)EW
Usage Guidelines This command is supported on PVLANs only.
ARP entries that are learned on Layer 3 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) ip 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) no ip sticky-arp
Switch(config)# end
Switch#
OL-25342 -01
ip sticky-arp
no ip sticky-arp
Modification
Support for this command was introduced on the Catalyst 4500 series switch.
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.3.0SG and IOS 15.1(1)SG)
ip sticky-arp
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