IBM SAN768B-2, User Manual

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Table 15. Transceiver types and speeds by blade model (continued)
Blade Transceiver Auto negotiate/Fixed
Speeds supported
(xGbps)
CR16-8 QSFP Fixed 16
Attention:
With increasing speeds of optical connections, the cleanliness of the
connections assumes greater importance in ensuring maximum performance and
error free transmission. Due to the tighter tolerances associated with state of the art
optics, levels of contamination that were acceptable at lower speeds may not be at
higher speeds. While IEC Standard 61300-3-35 specifies a set of guidelines for
trouble free performance, most issues can be avoided by adhering to the following
best practices:
v When cables or connectors are not in use for extended periods of time, use the
dust covers provided.
v
Ensure that the cable length and type that is used are suitable for the speed and
application.
v
Inspect and clean optical connections and fiber cables before you connect or
reconnect components.
v
Ensure that cables are properly seated within the connector.
Kits are commercially available for cleaning and inspecting these connections. IBM
also offers services that will ensure optimal condition of the network.
Time and items required
The replacement procedure for one transceiver takes less than five minutes.
These items are required.
v
Replacement mSFP, SFP+, or QSFP
v
Optical transceiver extraction tool (for SFP+ transceivers)
The SAN768B-2 comes with a transceiver extraction tool (see Figure 39) and holster.
The extraction tool is designed to remove transceivers from blades where the space
is limited.
The 16-Gbps SFP+ transceivers have an attached pull tab similar to the mSFPs and
have no latching wire bail. To simplify insertion of the 16-Gbps SFP+ transceivers,
it is recommended to connect the cables first, and then insert them as a unit into
the port. These SFP+ transceivers do not require the extraction tool.
Note: This tool is part of the SAN768B-2 ship group and should be kept with the
chassis.
bm480020
Figure 39. Optical transceiver (SFP+) extraction tool
Chapter 5. Removing and installing components
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