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Brocade MLX Series and Brocade NetIron XMR Hardware Installation Guide 57
53-1002373-02
Router modules
1
The fan control modules include a bi-color LED, which indicates the status of the fans. Table 26
describes the states of this LED.
The router ships with fan assemblies fully installed. Fan assemblies are hot-swappable, which
means you can remove and replace them without powering down the system.
Cooling system for Brocade MLX Series and Brocade NetIron XMR routers
The cooling systems for Brocade MLX and Brocade NetIron XMR routers contain the following
components:
• 4-slot router: Equipped with a fan assembly that contains two 4-speed fans and two fan
controllers to support redundancy.
• 8-slot router: Equipped with a fan assembly containing four 4-speed fans and four fan
controllers to support redundancy.
• 16-slot router: Equipped with three fan assemblies. The fan tray located in the lower front of
the router contains six 4-speed fans. There are two fan assemblies located in the rear of the
router. For Brocade MLX-16 routers, each fan assembly contains one 4-speed fan. Eight fan
controllers support redundancy. High-speed fans for Brocade MLX-16 routers are identified in
the show chassis command output in the following manner:
Rev A Back Fan A-1: Status = OK, Speed = LOW (50%)
Rev A Back Fan A-2: Status = OK, Speed = LOW (50%)
• 32-slot router: Equipped with ten fan assemblies located in the rear of the router. Each fan
assembly contains a 4-speed fan. The fan trays support four settings, 50%, 75%, 90%, and
100%, as the normal fan speeds, which are set by the management module.
Figure 37 and Figure 38 show the fan locations for 4-slot and 8-slot routers. Figure 39 and
Figure 40 show the fan locations for 16-slot routers. Figure 41 shows the fan locations for 32-slot
routers.
TABLE 25 Brocade MLXe-32 router fan control LED
LED Position State Meaning
Fan control LED Rear of router
on the fan
assembly
Off The fans are not receiving power.
Green The fans are working and responding to commands from the
fan control module.
Red The fans are not working and not responding to commands
the fan control module.