Address Resolution Protocol (ARP) Manual Configuration on ESW2-550X Switch

Objective

Address Resolution Protocol (ARP) is a protocol that maps an Internet Protocol address to a MAC address that is recognized in the local network. ARP is used to keep track of all devices that are directly connected IP subnets of the switch. The switch maintains an ARP table which is made of mapped IP addresses and MAC addresses. When a packet needs to be routed to a certain device, the switch looks up the IP address of the device in its ARP table to obtain the MAC address of the destination device. The ARP table includes both static and dynamic addresses. Static addresses stay in the ARP Table until they are manually removed, while dynamic addresses are removed after a specified time-out interval. This document explains how to configure ARP parameters and ARP table configuration on ESW2-550X switches.

Applicable Devices

• ESW2-550X-48DC-R
• ESW2-550X-48-R

Software Version

• v1.2.9.44

Configure ARP Table Parameters

Step 1. Log in to the web configuration utility and choose IP Configuration > ARP. The ARP page opens:

Step 2. Enter the ARP entry age out time in the ARP Entry Age Out field. The default value is 300. After the ARP entry age out time, the ARP entries are removed from the table.

Step 3. Click one of the following radio buttons in the Clear ARP Table Entries field to describe which ARP table entries need to be cleared from the ARP Table.

• All — Removes all the static and dynamic ARP entries.

• Dynamic — Removes only the dynamic ARP entries. Dynamic ARP entries are the MAC addresses learned dynamically.

• Static — Removes only the Static ARP entries. Static ARP entries are the entries entered by the administrator to the ARP table.

• Normal Age Out — Removes all the ARP entries that have aged out.

Step 4. Click Apply.

Configure ARP Table

Add ARP Table Entry

Step 1. Log in to the web configuration utility and choose IP Configuration > ARP. The ARP page opens:

Step 2. Click Add. The Add ARP page opens:

Step 3. Click the desired radio button from the interface field. Only Interfaces to which IPv4 is assigned are available for selection.

• Port — If statistics for a single port are to be received. Choose a port from the adjacent drop-down list.

• LAG — Contains group of ports. Choose a LAG from the adjacent drop-down list.

• VLAN — If the interface is a VLAN interface.  Choose a VLAN from the adjacent drop-down list.

Step 4. In the IP Address field, enter the IP address of the host to which the MAC address is to be configured.

Step 5. Enter the MAC address of the host in the MAC address field.

Step 6. Click Apply. The user is taken back to the ARP page.

Edit ARP Table Entry

Step 1. Check the desired check box of the corresponding ARP entry which needs to be edited in the ARP Table.

Step 2. Click Edit.

Step 3. Click the desired radio button from the interface field. Only interfaces to which IPv4 is assigned are available for selection.

• Port — If statistics for a single port are to be received. Choose a port from the adjacent drop-down list.

• LAG — Contains group of ports. Choose a LAG from the adjacent drop-down list.

• VLAN — If the interface is a VLAN interface.  Choose a VLAN from the adjacent drop-down list.

Step 4. Choose the IP Address from the IP Address drop-down list.

Step 5. (Optional) Edit the MAC address in the MAC Address field if the MAC address was added manually.

Step 6. Click one of the following radio buttons in the Status field. The status can be changed if the MAC address is learned dynamically by the switch.

• Dynamic — If the ARP entry should be dynamic.

• Static — If the ARP entry is added manually.

Step 7. Click Apply.

Delete ARP Table Entry

Step 1. Check the required configuration that you want to delete, and click Delete button. The configuration is removed and the ARP page opens again.