# Locating Component Serial Numbers

Before contacting Juniper Networks to request a Return Materials Authorization (RMA), you must find the serial number on the chassis or component. To list all the chassis modules and their serial numbers, enter the following command:

host1#show hardware

You can also find the serial numbers on the modules. ID labels are usually applied near the ejector. See Figure 36.

Fan trays are not listed in the show hardware command output. You must remove the fan tray bezel to view the serial number ID label.

Figure 36: Representative Module Serial Number ID Label