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Follow these guidelines for using QSFPs when connecting ICLs. Refer to "Installing a QSFP transceiver"
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on page 76 to install cables and QSFP transceivers.
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v The QSFP ports on the core switch blades can be used only with an inter-chassis link (ICL) license.
After the addition or removal of a license, the license enforcement is performed on the ports only when
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the portdisable and portenable commands are issued on the ports. An ICL license must be installed
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on all SAN256B-6 and SAN512B-6 Directors forming the ICL connection. Up to nine neighboring
Directors can be connected with the MTP cables.
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v The 32 Gbps QSFP28 SWL transceivers on SAN256B-6 and SAN512B-6 Director core routing blades
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operate at 4x32 Gbps and 4x16 Gbps speeds so can be used for an ICL connection between a 32 Gbps
QSFP on a SAN256B-6 and SAN512B-6 Director core routing blade and a 16 Gbps QSFP transceiver on
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SAN384B-2 and SAN768B-2 Director core routing blade. Use the appropriate ICL kit for this
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application.
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v An off-the-shelf MTP cable up to 100 meters can be used as an ICL cable when using the standard
SWL optics.
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v The 2 km 16 Gbps LWL QSFP has an integrated 3 meter single-mode pigtail with a male MTP
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connector for connectivity to a patch panel or female terminated MTP patch cable to achieve up to 2
km distances. Refer to "4x16 Gbps 2 km LWL QSFP" for more information.
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v The 2 km 4x32 Gbps LWL QSFP28 transceiver supports SMF LC cable and duplex LC connectors (same
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as used with 10 km SFP+ transceiver).
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v
IBM supports fully populating a switch with ICL connections using a mixture of 100 m SWL, 4x16
2km, and 4x32 Gbps 2 km optics.
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v For complete requirements and considerations for using QSFPs to support 2 km on ICL ports, refer to
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"Using the QSFPs that support 2 km on ICL ports" in the Fabric OS Administration Guide.
On the core routing blade face-plates, QSFP ports belonging to the same trunking groups are indicated
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with the same color border under the ports. These colors are also applied to the port map labels on each
blade faceplate to indicate ports belonging to the same trunking groups.
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For details on the following subjects, refer to the "Inter-Chassis Links' section of the Fabric OS
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Administration Guide:
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v ICL topologies
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v ICL trunking
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v Configuring ICLs between SAN256B-6 and SAN512B-6 Directors
v Configuring ICLs between SAN256B-6, SAN512B-6, SAN384B-2, and SAN768B-2 Directors
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4x16 Gbps 2 km LWL QSFP
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The 4x16 Gbps 2 km LWL QSFP, is a hot-swappable, low-voltage (3.3 V) digital diagnostic optical
transceiver that supports high-speed serial links over parallel single-mode optical fibers at signaling rates
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up to 4×14.025 Gbps. The QSFP is integrated with a 3 m ribbon fiber cable with a male MTP 1x12
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connector. The QSFP supports up to 2 km link length on parallel single-mode fiber.
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Figure 34. 2 km LWL QSFP transceiver with integrated cable
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1. MTP 1x12 fiber male connector
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2. Integrated 3-meter MTP cable
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3. Transceiver with pull-tab
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70
SAN256B-6 Installation, Service, and User Guide
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