Brocade MLX Series and Brocade NetIron XMR Diagnostic Guide ...

Fiber optic modules 2If none of these measures resolves the problem, you must perform the following steps.1. Shut down the device immediately.2. Inspect all fans for damage or failure.3. Inspect electrical connections to the fans.4. Replace any component that has been damaged by excessive temperature.The following are the normal operating temperature, humidity, and altitude specifications forBrocade NetIron XMR and Brocade MLX series routers:• Operating temperature: 0° to 40°C (32° to 104°F)• Relative humidity: 5 to 90%, at 40°C (104°F), noncondensing• Operating altitude: 0 to 3048 meters (0 to 10,000 ft)Fiber optic modulesThe most common problems with fiber optic modules are caused by dirty connectors. Opticalcables that are contaminated in any way (with dust, hand oil, and so on) can degrade the optic eyepattern. Some of the following symptoms may be experienced:• Port appears to not function (either no link or unstable link)• Cyclic redundancy check (CRC) errors• Port flapping• Packet lossBefore inserting the fiber cable into the fiber optic transceiver, ensure that it is free of dust bycleaning the end. A “Fiber Swiper” cleaner is provided by Brocade for this purpose with each opticshipment (reference instructions provided with the Fiber Swiper).It is very important that the end of an optical cable is clean when using any data rate. However, it iscritical that cable ends are clean when using 10 Gigabit data rates. This must be the first step introubleshooting symptoms such as those stated above. Always ensure that the optical cables arecleaned.NOTEWhen not using a fiber optic module port connector, replace the protective cover to prevent dust ordirt from contaminating the connector.Fiber optic show commandsThis section describes the show command that displays optics information.show versionSyntax: show versionThis command displays information about optic modules installed in the Brocade NetIron XMR andBrocade MLX series routers. Optics information resembles the output segment in the followingexample.Brocade MLX Series and Brocade NetIron XMR Diagnostic Guide 5153-1002426-02