IBM SAN768B-2, Installation, Service And User Manual

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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 bend radius for a 50 micron cable is 2 in. under full
tensile load and 1.2 in. with no tensile load.
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.
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.
1
mini-SFP connector
3
1.6 mm cable
2
Duplex clip (black)
4
SFP connector
Note that the duplex clip on the mSFP end of the cable is black for easier
recognition. See Table 24 on page 129 for a listing of the qualified mSFP optical
cables for the FC8-64 port blade.
If ISL Trunking is in use, group the cables by trunking group. The ports are
color-coded to indicate which ports can be used in the same ISL Trunking group:
eight ports marked with solid black ovals alternate with eight ports marked with
oval outlines.
2 3 4
1
b768ig045
Figure 12. Cable design for the mSFP patch cables for the FC8-64 high density port blade
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SAN768B-2 Installation, Service, and User Guide