How to check the bandwidth of an optical module
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. Optical bandwidth is defined as the frequency at which half the optical power is incident in the channel. Whether you're a network engineer validating new inventory or an integrator preparing for deployment, knowing how to test optical transceiver modules can save time, reduce failures, and ensure SLA compliance. This example uses the Moduletek SFP-10G-LR module connected to an Intel X520 network card. The optical module is a core component in optical fiber communication systems, and its performance parameters directly impact the transmission rate, stability, and reliability of the entire system.
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