Brocade Communications Systems VDX 6710 Hardware Reference Manual page 46

DRAFT: BROCADE CONFIDENTIAL
5
Before beginning the installation
You can use external labels as a guide. The power supplies and fan assemblies are labeled with an
airflow symbol on the faceplate to indicate whether the assembly takes in or exhausts air. The
symbol also appears on the top of the FRU. All FRUs in a chassis must have the same label affixed
so that airflow direction is consistent. Figure illustrates examples of the airflow labels.
Examples of airflow symbols:
AIRFLOW
AIRFLOW
FIGURE 6 Examples of airflow symbols:
The green E symbol indicates an exhaust FRU. This unit pulls air in from the port side of the switch
and exhausts it out the non-port side. This is called front-to-back airflow or forward airflow. This
symbol should appear on FRUs with part numbers ending with -F.
The orange I symbol indicates an intake FRU. This unit pulls air in from the non-port side of the
switch and exhausts it out the port side. This is called back-to-front airflow or reverse airflow. This
symbol should appear on FRUs with part numbers ending with -R..
The show environment fan command will indicate either "forward" or "reverse" airflow.
34 Brocade VDX 6710 Hardware Reference Manual
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