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NOTE:
The MX2008, MX2010, and MX2020 routers support the same fan modules (fan tray
and fan tray air filter).
The host subsystem monitors the temperature of the router components. When the router is operating
normally, the fans function at lower than full speed. If a fan fails or the ambient temperature rises above
a threshold, the speed of the remaining fans is automatically adjusted to keep the temperature within the
acceptable range (see
Figure 16 on page 55
Figure 19 on page
57.
Figure 16: Airflow Through the Chassis
The MX2008 router provides front-to-back cooling system. Air is pushed into the bottom inlet and up
through the fan tray, and is exhausted out the upper rear of the system. The cooling system cools the
MPCs, SFBs, and RCBs.
The cooling system components work together to keep all router components within the acceptable
temperature range. The MX2008 router has two fan trays located at the bottom of the router that install
horizontally. Each fan tray contains six fans. These are labeled 1 through 6 and each fan is 172 mm in
diameter. The fan trays are interchangeable and are hot-insertable and hot-removable.
Each fan tray has a double safety latch, so the fan tray cannot be removed in one swift motion (see
Figure 18 on page
56). To remove the fan tray, press and hold the latch until the STATUS LED turns off.
The secondary latch will engage during removal. Press the secondary latch to fully remove the fan tray.
and
Figure 17 on page
56). The fan tray filter is shown in
55
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