After the popularity of Wi-Fi 6/7 wireless APs, high-definition video and industrial vision terminals, gigabit uplink bandwidth is constantly being filled. The cost of directly upgrading to 10G is high, and 2.5G optical modules have become a pragmatic mid-range. The core of selection is the matching of port capabilities and distance.
First confirm that the switch optical port supports 2.5G
The SFP port will not automatically negotiate 2.5G and can only run when the platform hardware supports multiple speeds. You need to check whether the switch parameters support 2.5Gbps, and whether you need to manually specify the rate mode in the port view; the fixed 100M/Gigabit ports of old equipment cannot be upgraded by replacing modules, and can only be replaced by the entire machine or the link structure can be changed. If you are unsure, it is safest to send the specific model of the switch to the module supplier for verification.
Category 4 trigger suitable for 2.5G
- Multiple wireless APs are aggregated, and the measured traffic of a single uplink is close to 1Gbps
- 8-megapixel multi-channel video or machine vision camera centralized backhaul
- Too many connections are connected to the Gigabit access switch and the convergence ratio is unbalanced.
- For distances ranging from a few kilometers to dozens of kilometers, the unit price of 10G modules is relatively high.
Match models by distance
In-building short distance internet selectionSFP 2.5G multi-mode dual fiber optical module;For use within 20KM between buildings in the parkSFP 2.5G single mode dual fiber 20KM optical module; For regional monitoring series connection and station remote networking, please refer toSFP 2.5G single mode dual fiber 40KM optical module, and there is an 80KM model for longer distances. EB-LINK recommends merging the three spare parts pools of 100M, 100M, and 2.5G into one specification list to avoid confusion on site.
The advantage of the 2.5G transition is that investment can be spent on truly congested sections, and optical fiber can be basically reused with existing equipment. Before the transformation, measure the peak traffic and received optical power of each link, so that the migration plan will have more basis.