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Catalyst 3850 Switch Hardware Installation Guide
OL-26779-02
Chapter 3 Installing a Network Module
Finding the Network Module Serial Number
Figure 3-7 Network Module with SFP Modules Installed
Removing SFP or SFP+ Modules
Step 1 Attach an ESD-preventive wrist strap to your wrist and to an earth ground surface.
Step 2 Disconnect the cable from the SFP module. For reattachment, note which cable connector plug is send
(TX) and which is receive (RX).
Step 3 Insert a dust plug into the optical ports of the SFP module to keep the optical interfaces clean.
Step 4 If the module has a bale-clasp latch, pull the bale out and down to eject the module. If you cannot use
your finger to open the latch, use a small, flat-blade screwdriver or other long, narrow instrument to open
it.
Step 5 Grasp the SFP module, and carefully remove it from the slot.
Step 6 Place the SFP module in an antistatic bag or other protective environment.
Finding the Network Module Serial Number
If you contact Cisco Technical Assistance regarding a network module, you need to know its serial
number.
1 Network module 3 Send (TX) optical bore
2 SFP modules 4 Receive (RX) optical bore
333419
C3850-NM-4-1G
Catalyst 3850 48 PoE+