StarTech.com Cisco SFP-GE-S Compatible SFP Module - 1000BASE-SX - 1GbE Multimode Fiber MMF Optic Transceiver - 1GE Gigabit Ethernet SFP - LC 550m - 850nm - DDM Cisco IE3400, IE3300, IE3200

Product Overview

AI-generated summary

If you’re looking for a cheap, boring way to light up an SFP port on a Cisco 3xxx/3xxx-ish switch with multimode fibre, this StarTech SFP is the sort of item that can make sense. At ~£24 ex-VAT, it’s priced to be a “get it working and don’t overthink it” purchase—especially if you’re doing spares, replacing a failed module, or standardising your lab/warehouse links without paying Cisco-branded prices. The fact it supports DDM is a nice touch for operations folks too; it makes monitoring cleaner rather than guessing when optics are tired.

That said, I wouldn’t treat it like a no-questions-asked Cisco drop-in in every situation. Compatibility depends on the exact switch model/firmware and what optic and link parameters the switch expects; sometimes non-Cisco optics work perfectly, sometimes you get diagnostic warnings or link quirks. Also, don’t buy this if your network is already pushing limits on multimode (or you’ve got “mystery” fibre plants)—if the fibre length or cleanliness is marginal, it’s the first thing that’ll behave oddly. For a typical UK SMB/enterprise access/aggregation use case with known multimode runs (and you can verify with link tests), it’s good value. If you need maximum peace of mind in a mission-critical core or you can’t control the fibre quality, you may be better off spending more on Cisco optics.