Brocade Communications Systems Brocade VDX 8770-4 - Manual (Page 53)

Brocade VDX 8770-4 Hardware Reference Manual 33
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Managing cables
3
5. Organize the cables. Refer to “Managing cables.”
6. Verify the Brocade VDX 8770-4 and port status using the show interface command.
7. Verify fabric connectivity using the show fabric all command.
Installing QSFP transceivers and cables
Complete the following steps to install the QSFP transceivers and cables in the 12x40G line cards.
Because each QSFP transceiver consists of four 10 GbE ports, be aware that any problems with
one port could affect all four ports in the quad.
1. Position one of the QSFP transceivers so that the key is oriented correctly to the port.
2. Using the tab, insert the transceiver into the port until it is firmly seated. You can feel a small
click when it completely seats.
Transceivers are keyed so that they can only be inserted with the correct orientation. If a
transceiver does not slide in easily, ensure that it is correctly oriented.
When the transceiver is correctly seated, the status LED will turn solid amber.
3. Remove the protective plug from the QSFP transceiver and the protective cap from the special
QSFP cable and insert it into the transceiver until it is firmly seated.
The cables are also keyed to fit into the transceivers correctly.
When the cable is correctly seated, the status LED will change from amber to green.
4. Repeat step 1 through step 3 for the remaining QSFP ports.
5. Organize the cables. Refer to “Managing cables.”
Managing cables
Cables can be organized and managed in a variety of ways; for example, using cable channels on
the port sides of the rack or patch panels to minimize cable management. With the horizontal
orientation of the line cards in the Brocade VDX 8770-4, a pair of vertical cable management finger
assemblies have been provided to keep the cables from hanging down in front of other modules.
Following is a list of recommendations:
• Leave at least 1 m (3.28 ft) of slack for each port cable. This provides room to remove and
replace the Brocade VDX 8770-4, allows for inadvertent movement of the rack, and helps
prevent the cables from being bent to less than the minimum bend radius.
• The minimum bend radius should be no smaller than ten times the cable radius. The
minimum radius to which a 50 micron cable can be bent under full tensile load is 5.1 cm
(2 in.). For a cable under no tensile load, that minimum is 3.0 cm (1.2 in.).
• If ISL trunking is in use, group the cables by trunking group.
• Generally, Velcro
®
-type cable restraints are recommended to avoid creating sharp bends
or kinks in the cables. Do not use tie wraps with optical cables because they are easily
overtightened and can damage the optic fibers.