Profile Overrides - ARP

About this task

ARP (Address Resolution Protocol) is a protocol for mapping an IP address to a hardware MAC address recognized on the network. ARP provides protocol rules for making this correlation and providing address conversion in both directions.

When an incoming packet destined for a host arrives, ARP is used to find a physical host or MAC address that matches the IP address. ARP looks in its ARP cache and, if it finds the address, provides it so the packet can be converted to the right packet length and format and sent to its destination. If no entry is found for the IP address, ARP broadcasts a request packet in a special format on the LAN to see if a device knows it has that IP address associated with it. A device that recognizes the IP address as its own returns a reply indicating it. ARP updates the ARP cache for future reference and then sends the packet to the MAC address that replied.

To override the access point profile's ARP configuration:

Procedure

Go to Configuration → Devices → Device Overrides.

The Device Overrides screen displays. This screen lists devices within the managed network.
Expand Network and select ARP.

The selected device's ARP configuration screen displays.

Profile Overrides - Network - ARP Configuration Screen
Select + Add Row from the lower right-hand side of the screen to populate the ARP table with rows used to define ARP network address information.

Set the following the ARP parameters:


Switch VLAN Interface	Use the spinner control to select a virtual interface for an address requiring resolution with the controller, service platform or access point.
IP Address	Define the IP address used to fetch a MAC Address recognized on the wireless network.
MAC Address	Displays the target MAC address subject to resolution. This is the MAC used for mapping an IP address to a MAC address recognized on the network.
Device Type	Specify the device type the ARP entry supports. Host is the default setting.

Select OK to save the ARP configuration changes.

Select Reset to revert to the last saved configuration.