IBM SAN768B-2, Руководство пользователя

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Cable management
The cable management comb (
5
in Figure 1 on page 3) is attached to the chassis
under the chassis door and allows for simple cable management. The comb can be
installed without service disruption.
Attention: Do not use tie wraps with optical cables because they are easily
overtightened and can damage the optic fibers.
Cables can be organized and managed in a variety of ways, for example, using
cable channels on the sides of the cabinet or patch panels to minimize cable
management. Following is a list of recommendations:
v
Plan for rack space required for cable management before installing the chassis
v
Leave at least 1 m (3.28 ft) of slack for each port cable. This provides room to
remove and replace the switch, allows for inadvertent movement of the rack,
and helps prevent the cables from being bent to less than the minimum bend
radius.
v
If you are using ISL Trunking, consider grouping cables by trunking groups. The
cables used in trunking groups must meet specific requirements, as described in
the
Fabric OS Administrator’s Guide .
v For easier maintenance, label the fiber optic cables and record the devices to
which they are connected.
v
Keep LEDs visible by routing port cables and other cables away from the LEDs.
v
Use hook and loop type straps to secure and organize fiber optic cables.
Attention: The minimum radius to which a cable should be bent under full
tensile load is 5 cm (2 in). For a cable under no tensile load, that minimum is 3 cm
(1.2 in).
Attention: Do not route the cables in front of the air exhaust vent, which is
located at the top of the port side of the chassis.
High-density cabling
The FC8-64 high density port blade cannot use the standard LC cables because the
pitch between optics in the new mSFP transceiver is smaller than in standard SFPs.
Patch cables and panels can be used to attach standard size cabling to the blade if
necessary. Figure 12 illustrates the mSFP to SFP patch cable. The mSFP transceivers
are used only with the FC8-64 port blade. Narrower OM-3 LC cables are used to
connect the FC8-64. These cables are offered by several major manufacturers.
Contact your IBM representative for options regarding different cable and patch
panel configurations to simplify cable management with higher density FC8-64
port blades.
2 3
4
1
b768ig045
Figure 12. Cable design for the mSFP patch cables for the FC8-64 high density port blade
Chapter 2. Installing a SAN768B-2 in a cabinet
31