A module must be in the uplink slot at all times. Do not remove the dust plugs from the pluggable transceivers or the rubber caps from the fiber-optic cable until you connect the cable. The plugs and caps protect the module ports and cables from contamination and ambient light. So how do you choose the right SFP+ optical module? There are two main points, as follows: (1) Determine the required transmission distance SFP+ optical modules have. Small Form-factor Pluggable modules (SFP module) are the workhorses of modern network connectivity, enabling flexible fiber optic or copper links between switches, routers, firewalls, and servers. Whether you're upgrading bandwidth, replacing a faulty unit, or reconfiguring your topology, knowing. Locate the SFP (or SFP+) slot on your networking device (e., SFP, SFP+, or QSFP+) and supported fiber type (e. Different types of optical modules have different performance parameters such as speed. The switch can operate without a network module, but a blank module (with no ports or SFP slots) is available and should be installed when uplink ports are not required. The switch generates logs when you insert or remove a network module with SFP/SFP+/SFP28/QSFP+ slots.