Chapter 7 The SR2024 Switch
78 Aerohive
Installing or Replacing an SFP Module
You can install or replace SFP modules in the SR2024 while it is powered and running. When you are working
with SFP modules, especially fiber modules, be aware of the following safety precautions:
Follow these steps to install or replace an SFP module.
1. Remove the module from its protective packaging.
2. While wearing an ESD wrist strap, insert the module into an uplink port until it clicks into place. Modules
are keyed to prevent incorrect installation.
3. If you are not using the module, leave the protective cover in place. To remove a module, lift the bail
handle on the front of the module and pull gently on the module until it disengages from the port.
Cabling an SFP Module
To connect a cable to an SFP module, perform the following steps.
1. Remove the cover from the SFP module and store it in a resealable container to prevent the transfer of
dust to the module. Keep the resealable containers near the connectors for easy access.
2. Gently insert the cable connectors (a tab on each connector should face upward) into the module until
the tabs lock into place.
3. Check the LEDs to determine that the connections are working properly. See "Changing the
Temperature and Fan Speed Alarm Thresholds" on page 79.
Cleaning Fiber Ports and Connectors
To avoid problems with fiber optic connections, it is important to clean both cable and port connectors
each time you connect or disconnect them. Dust accumulates easily in connectors and can cause
connection problems.
Use a dry (recommended) or wet cleaning process to clean connectors using either lint-free wipes or
lint-free swabs. Lightly wipe the connectors to clean them. Never reuse a wipe or swab. If possible, inspect
the connectors with a fiber scope to check that they are properly clean.
If you use a wet cleaning process, use only 99% isopropyl alcohol. Make sure that all alcohol is wiped away
from all surfaces (do not allow it to evaporate slowly) and has not collected in crevices of cavities. Alcohol
residue can contaminate connectors and it is difficult to remove all traces of it. For this reason, a dry
cleaning process is preferable.
All fiber optic interfaces contain Class 1 lasers. Invisible laser radiation can also be emitted from
disconnected fibers. Never look into the end of a fiber, regardless of whether it is active or
disconnected.
Keep the chassis area clean and dust-free during and after installation.
Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. ESD damage
occurs when electronic components are improperly handled and can result in complete or
intermittent failures. Be sure to follow ESD-prevention procedures when installing SFP modules.
Wear an ESD wrist strap with a series 1 Megohm resistor and attach the clip end of the strap to a
metal surface (such as an equipment rack) to act as ground.
Always leave the protective cap in place on an SFP module when you are not using it to
prevent dust from collecting on the connectors.
Always clean cable and port connectors before cabling an SFP module. See "Cleaning Fiber Ports
and Connectors" on page 78 for information about how to clean fiber modules.
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