How to obtain the DHCP Lease information from the Tech Support Report file?

10/14/2021 19 People found this article helpful 489,901 Views

Description

A DHCP Binding is a mapping of an IP Address to a device's MAC Address. DHCP could be statically assigned or dynamically assigned to a device. Once it is assigned, it is bound or attached to the device for certain duration. Static binding is when an administrator assigns a particular IP to a MAC Address or a device. It is mapped manually and bound till the administrator himself un-assigns or deletes the entry. Whereas a dynamic binding is automatic and the DHCP server randomly assigns an IP from a given pool to a device and this is renewed after certain intervals.

This KB article illustrates how to see the DHCP lease information in the Tech Support Report obtained from SonicWall.

Resolution

Resolution for SonicOS 6.5

This release includes significant user interface changes and many new features that are different from the SonicOS 6.2 and earlier firmware. The below resolution is for customers using SonicOS 6.5 firmware.

Step 1: Log in to the SonicWall Security Appliance management GUI. Click Investigate in the top navigation menu.

Step 2: Go to System Diagnostics.

Step 3: Enable the check box "DHCP Bindings" and click on "Download Report".

Step 4: A small pop-up window appears and click OK to save the TSR file to the local machine.

Step 5: Open the TSR file and press CTRL+F to bring the search box.

Step 6: In the search box, enter DHCP Bindings and hit enter to move to DHCP section on the TSR.

Below screen shot depicts the DHCP Lease information present on the TSR along with IP conflict detection.

Resolution for SonicOS 6.2 and Below

The below resolution is for customers using SonicOS 6.2 and earlier firmware. For firewalls that are generation 6 and newer we suggest to upgrade to the latest general release of SonicOS 6.5 firmware.

Step 1: Log in to the SonicWall Security Appliance management GUI.
Step 2: Navigate to System | Diagnostics page.

Step 3: Enable the check box "DHCP Bindings" & click on "Download Report".
Step 4: A small pop-up window appears and click OK to save the TSR file to the local machine.

Step 5: Open the TSR file and press CTRL+F to bring the search box.
Step 6: In the search box, enter DHCP Bindings and hit enter to move to DHCP section on the TSR.