Inter-Switch Link (ISL) Trunking
ISL Trunking is optional software that allows you to create trunking group of ISLs
between adjacent switches. Up to eight FC ports on the SAN48B-5 can be used as a
trunking group to achieve speeds up to 128 Gbps (256 Gbps full duplex) for
optimal bandwidth utilization and load balancing. For more information about
Brocade ISL Trunking, see the Fabric OS Administrator's Guide.
Installing SFP+ transceivers and connecting cables
The SAN48B-5 only supports Brocade-branded SFP+ optical transceivers. For the
Fibre Channel connections, the switch uses SFP+ transceivers that support any
combination of Short Wavelength (SWL), Long Wavelength (LWL), and Extended
Long Wavelength (ELWL) optical media. This switch will accept both 16 Gbps and
8 Gbps SFP+ transceivers.
Note: For a listing of transceivers compatible with this product:
v Go to the IBM SAN web page www.ibm.com/systems/storage/san
v Select the IBM System Storage SAN48B-5 product link
v On the displayed product page, click the Interoperability Matrix link in
the Learn more section.
v In the Interoperability matrix, click the Transceivers link.
If you use an unqualified transceiver, the switchShow command output shows the
port in a Mod_Inv state. Fabric OS also logs the issue in the system error log.
The 16 Gbps SFP+ transceivers have an attached pull tab and 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. Figure 8 on
page 20 shows the installation of a 16 Gbps SFP+, and Figure 9 on page 20 shows
the installation of an 8 Gbps SFP+ with a wire bail latching mechanism.
Installing 16 Gbps SFP+ transceivers
Note: Each SFP+ has a 10-pad gold-plated PCB-edge connector on the bottom. The
correct position to insert an SFP+ into the upper row of ports is with the
gold edge down. The correct position to insert an SFP+ into the lower row
of ports is with the gold edge up.
Complete the following steps to install 16 Gbps SFP+ transceivers and cables.
1. Remove any protector plugs from the 16 Gbps SFP+ transceiver and the cable.
2. Position a cable so that the key (the ridge on one side of the cable connector) is
aligned with the slot in the transceiver. Insert the cable into the transceiver
until the latching mechanism clicks.
Attention: Take care not to bend the SFP+ pull tab. Do not insert a cable
intended for an mSFP transceiver into a regular SFP+ transceiver. You may
damage the cable.
3. Transceivers are keyed so that they can only be inserted with the correct
orientation. Insert the cable/transceiver into the port, using the pull tab to help
push the transceiver into the port. If it does not slide in easily, ensure that it is
correctly oriented.
Chapter 2. Installing and configuring the switch 19
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