The following figure shows an
empty Cisco UCS 5108 server chassis and identifies the front, back, and module
Whenever you remove a module
from the chassis for an extended period of time, always replace the module with
the appropriate blank panel. Failing to do so can result in heating and EMI
issues. Blank panels can be ordered from Cisco Systems.
symbol means danger. You are in a situation that could cause bodily injury.
Before you work on any equipment, be aware of the hazards involved with
electrical circuitry and be familiar with standard practices for preventing
accidents. Use the statement number provided at the end of each warning to
locate its translation in the translated safety warnings that accompanied this
device. Statement 1071
SAVE THESE INSTRUCTIONS
This unit is intended for
installation in restricted access areas. A restricted access area can be
accessed only through the use of a special tool, lock and key, or other means
of security. Statement 1017
Only trained and qualified
personnel must be allowed to install, replace, or service this equipment.
You can remove blade server hard drives without removing the blade server from the chassis. All other component replacement for a blade server requires removing the blade from the chassis. Unused hard drive bays should always be covered with cover plates (N20-BBLKD) to assure proper cooling and ventilation. The chassis is omitted from illustrations here to simplify the drawing.
To prevent ESD damage, wear grounding wrist straps during these procedures and handle modules by the carrier edges only.
Figure 4. Positioning a Power Supply in
the Cisco UCS Server Chassis
Both grids in a power
redundant system should have the same number of power supplies. If your system
is configured for grid redundancy, slots 1 and 2 are assigned to grid 1 and
slots 3 and 4 are assigned to grid 2. If there are only two power supplies in a
redundant- mode chassis, they should be in slots 1 and 3. This would be a very
unusual configuration, with a single B200 blade server in the chassis. A larger
configuration would require two power supplies per grid. Slot and cord
connection numbering is shown below.
Figure 5. Power Supply Bay and
Connector Numbering (AC Version Shown)
Removing a Power Supply
If you are using the Cisco UCS 5108 server chassis with one power supply (this is only supported in earlier versions of the system software), removing the power supply will cause the servers and chassis to shut down. If you are using more than two power supplies, and you remove one of them, the servers continue to operate as long as the other power supplies are sufficient to meet the power requirements of the number of servers in the chassis.
Loosen the captive screw on the front of the power supply.
Lift up the power supply’s handle to unseat the power supply.
Using the lever, pull the power supply from its slot. Place your other hand under the power supply to support it while you slide it out of the chassis.
Install a blank power supply filler panel (N20-CBLKP) if the power supply bay is to remain empty.
Installing and Removing a Power Distribution Unit (PDU)
The Power Distribution Unit should only be replaced by a Cisco certified technician. This section is for reference only.
You can not hot swap a PDU (N01-UAC1). The entire chassis will need to be shut down and all power cords should be unplugged before attempting this procedure.
Hold the PDU module from
below, with the captive screws at the top of the module.
Figure 6. Positioning a PDU (N01-UAC1)
in the Cisco UCS Server Chassis, AC Version
Push the PDU module into the
chassis until it seats properly. If power supplies are installed, you may need
to partially remove them.
Tighten the captive screws.
If necessary, reseat the
power supplies and restart the system to observe LED behavior.
Removing a PDU
Partially remove all installed power supplies. If a power supply is seated into the PDU, removal is difficult or impossible.
Loosen the captive screws.
Pull the PDU clear of the chassis by pulling on the captive screws. Support its weight from below.
Installing and Removing a FEX or Fabric Interconnect
The chassis houses two FEXes
(Cisco UCS 2104XP, UCS 2208XP, UCS 2204XP) that allow the blade servers in the
chassis to communicate with Cisco UCS fabric interconnects. FEXes can have
either four or eight I/O ports.
The same slot that is
used for a FEX is used for the Cisco UCS 6324 Fabric Interconnect. Up to two of
these modules can be installed in the chassis.
A FEX is sometimes referred
to as an “I/OM” or IO Module.
Before you install a pair of
UCS 2208XP FEXes to an existing UCS chassis using a pair of UCS 2104XPs, or add
a new chassis with a pair of UCS 2208XP FEXes to a UCS instance you must
perform a full upgrade to UCS software version 2.0(1) or later. The UCS 2208XP
FEX is not recognized by earlier software releases.
Before you install a pair of
UCS 2204XP FEXes to an existing UCS chassis using a pair of UCS 2104XPs, or add
a new chassis with a pair of UCS 2204XP FEXes to a UCS instance you must
perform a full upgrade to UCS software version 2.0(2) or later. The UCS 2204XP
I/O Module is not recognized by earlier software releases.
Upgrading from a pair of UCS
2104XP to a pair of UCS 2200 series modules should be done first on the FEX
connected to the standby Fabric Interconnect, standby should be made active,
then the FEX connected to the new standby Fabric Interconnect can be upgraded.
If you are also performing an
upgrade on the fabric interconnects, perform the upgrades separately.
Attempting to upgrade both FEXes and fabric interconnects in a single process
will likely complicate any reconfiguration needed on the FI ports.
Adding any M3 model
blade server may require an upgrade from UCS 2104XP to UCS 2208 series FEXes.
M3 blade servers use newer MLOM and adapter card models that are not fully
compatible with the older FEX model.
Before you disconnect any
data cables, make a record of which FEX ports are connected to which Fabric
Configurations of 1, 2, 4, or
8 10 GB connections between FEX and Fabric interconnect are supported in UCS.
If your UCS 2104XP has 4 physical connections and you want more, the next
available upgrade step is the full 8 connections on the UCS 2208XP. You should
verify that the FEX upgrade is completed with no problems before adding the
connections for ports 5-8.
If you intend to implement
the Fabric port channel feature available in UCS software version 2.0, you may
need to rearrange the cabling between FEX and Fabric Interconnect before
performing the feature configuration. Fabric port channel will require that all
physical links from a given FEX physically connect to a contiguous block of
ports (1 to 8 or 9 to 16, and so on). This feature requires a Cisco UCS M82-8P
Virtual Interface Card in at least one blade server, and a UCS 2200 Series I/O
module that is connected to a UCS 6200 Series Fabric Interconnect. See the
Fabric Port Channel sections in the configuration guides for more details.
Removing a FEX or UCS 6324 Fabric Interconnect
Remove all cables from the
FEX or UCS 6324 Fabric Interconnect.
Loosen the captive screws on
the FEX or UCS 6324 Fabric Interconnect.
Pull the levers outward to
unseat the FEX or UCS 6324 Fabric Interconnect.
Using the levers, pull the
FEX or UCS 6324 Fabric Interconnect from its slot.
Install a blank FEX filler
panel (N20-CBLKI) if the FEX or fabric interconnect slot is to remain empty.
If you plan to remove a FEX
or fabric interconnect for an extended period of time, you must replace it with
the N20-CBLKI blank to avoid EMI issues. Blanks can be order from Cisco.
Installing a FEX or Fabric Interconnect
Make sure that the two levers
at the front of the FEX or the UCS 6324 Fabric Interconnect are pulled open.
Slide the FEX or UCS 6324
Fabric Interconnect into the chassis slot, ensuring that the module is fully
Figure 7. Positioning a FEX or Fabric
Interconnect within the Server Chassis
Close the levers and tighten
the captive screw on each lever.
You can hot swap a fan module (N20-FAN5) without causing an electrical hazard or damage to the system. However, you can only remove one fan module while the system is operating. Removing more than one fan module could cause overheating.
When a fan is removed, louvers inside the chassis prevent recirculation of air into the system or loss of cooling. However, you should not leave the chassis for extended periods of time without all fan modules in place.
Hold the fan module with the
spring latch at the top of the module.
Push the fan module into the
chassis until it seats properly and the spring latch snaps into place.
Listen for the fans if the
chassis is powered on. You should immediately hear it operating. If you do not
hear it, ensure that the fan module is inserted completely in the chassis and
the faceplate is flush with the outside surface of the chassis.