Execute the following command to view detailed interface and optical module status: ethtool <devname> The output includes interface rate, module rate, link status (Link detected: yes is required for normal module operation), and interface configuration details. To check the details of an SFP module in Red Hat Enterprise Linux (RHEL), you can use the ethtool command., eth0, eth1): For Example: Identifier : 0x03. For optical modules used on switches, we read their information via brand-specific terminal commands. It takes the device name (like swp1) as an argument. See man ethtool(8) for details. Not all. H ow do I display the list of loaded Linux Kernel modules or device drivers on Linux operating systems? You need to use the lsmod command, which show the status of loaded modules in the Linux Kernel. With. I need to collect hardware component inventory from physical systems running RHEL (6 and 7) and its derivatives. I know I can easily get this with ethtool, as long as the interface and the link is up. Is there any way to. The Cisco Small Business Series Switches allow you to plug in a Small Form-factor Pluggable (SFP) transceiver in their optical modules to connect fiber optic cables. Once the transceiver and fiber optic cable are plugged in properly in the switch optical module, you should be able to view the.