Knowledge

The network card only completes half of the link. The speed, wavelength, and packaging of modules, cables, and jumpers must be aligned simultaneously. This article gives the demarcation method of selecting media by distance and the configuration examples of two common gears.

If the height of the bezel is mismatched, no matter how good the card is, it will not fit into the chassis. This article explains the size correspondence between half-height and full-height bezels, the conventions of random accessories, and the key points for checking heat dissipation and power consumption under dense deployment.

The speed gears at both ends of the link must be consistent. This article explains the adaptation relationships and adaptive boundaries of 10 Gigabit, 25G, 40G, and 100G gears, and provides a checklist for determining gears based on traffic and core bandwidth based on slots.

The number of ports determines the redundancy method, network isolation granularity, and accessory cost. This article provides applicable scenarios and cost calculation methods based on single-port, dual-port, and four-port configurations to avoid repeated procurement of modules for unused ports.

Compare the applicable boundaries of RJ45 electrical ports and SFP/SFP+ optical port network cards from the three dimensions of transmission distance, port power consumption and existing wiring. Common configuration methods and DAC usage suggestions are attached in two scenarios: same cabinet and across computer rooms.

This article sorts out the differences in speed, offloading, and virtualization capabilities of Intel's four common network card chips by generation, and provides corresponding selection methods for three scenarios: upgrading old platforms, creating new access layers, and virtualization, so that you can save money.

There are three constraints on optical fiber cabling in hot and cold aisle enclosed computer rooms: the trunk should be routed to avoid the air supply floor, seals and retainers should be made across the end walls, and the height of the cabinet top should be reserved for the bending radius and drawer pullout to prevent the door from hitting the jumper.

If there are not enough ports on the patch panel, temporary flying lines will be forced out. Leaving too many ports will eat into the budget. This article gives a three-step method for retaining redundancy: setting a proportion based on business growth, using dust caps and comparison tables to manage reserved ports, and using secondary wiring areas to replace stack ports.

Link failures in computer rooms are often caused by dirty patch panel ports and missing labels. This article organizes three procedures for end and port maintenance: end face cleaning and insertion loss and return loss baseline, standard plugging and unplugging actions, and double-end marking practices that can be stored for a long time.

Whether to choose trough type or ladder type for cabling racks, how much to leave for backbone filling rate, and how to deal with the bends in and out of the cabinet. This article gives three planning constraints and construction details for fiber optic cabling in the computer room. Following the finalization before starting construction can reduce the need for rework.