Hardware Overview
On both the X-Pedition 8000 and X-Pedition 8600, slot 0 is labeled “CM” and contains the primary control module. The CM slot cannot be used for line cards. The primary control module must be installed in this slot. The CM/1 slot can contain a redundant control module (if you install one) or can contain a line card. Slots 2 to 7 on the X-Pedition 8000 or slots 2 to 15 on the X-Pedition 8600 can contain any line cards unless otherwise noted in Installing Line Cards on page 71. For information about these items, see Control Modules on page 14 and Line Cards on page 20.
You can install line cards in any order in the slots. For example, you could install line cards in slots 2 and 5 and leave the other line card slots empty. The X-Pedition provides non-blocking throughput regardless of the software features you are using. Therefore, you do not need to “load balance” line cards by placing them in certain relationships to balance the load on the backplane. Regardless of where you install the line cards, the backplane can provide full, non-blocking throughput.
Backplane
The backplane occupies the rear of the chassis and connects the power supplies, control modules, and line cards together. The power supplies use the backplane to provide power to the rest of the system. The line cards and control modules use the backplane to exchange control information and packets. The backplane is installed at the factory. Contact Enterasys Networks if you wish to replace the backplane.
Fan Module
The X-Pedition contains a fan module to provide a cooling air flow across the control module(s) and line cards. The fan module is located on the left side of the control modules and line cards. The X-Pedition 8000 fan module contains two fans; the X-Pedition 8600 fan module contains six fans. The fan module is installed at the factory, but you can replace the module yourself, if necessary.
Note: To ensure that the fan module can provide adequate cooling, always provide a minimum of 3 inches of clearance on each side of the chassis.
Hot Swapping a Fan Tray
Note: Before you hot swap a fan tray on the X-Pedition, have the replacement fan nearby and ready to install—delays in completing the swap may cause the router to overheat.
1.Loosen the captive screws.
2.Remove the fan tray (the fans will wind down and stop). Although the system will continue to operate normally with the fans removed, if the fans are removed long enough the system will overheat, power off, and reboot. When the fan tray is removed, the following message will appear on the console:
%SYS-W-FANFAILED, system fan(s) have failed or fan tray is not installed
