IBM Storage Networking SAN256B-7 Installation, Service And User Manual page 90

• 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 the
portdisable and portenablecommands are issued on the ports. An ICL license must be installed on
all SAN256B-7 and SAN512B-7 Directors forming the ICL connection. Up to nine neighboring Directors
can be connected with the MTP cables.
• The 32Gb/s QSFP28 SWL transceivers on SAN256B-7 and SAN512B-7 Director core routing blades
operate at 4x32Gb/s and 4x16Gb/s speeds so can be used for an ICL connection between a 32Gb/s
QSFP on a SAN256B-7 and SAN512B-7 Director core routing blade and a 16Gb/s QSFP transceiver on a
SAN384B-2 or SAN768B-2 Director core routing blade. The 32Gb/s QSFP can also be used to connect
an SAN256B-7 or SAN512B-7 Director to an SAN256B-6 or SAN512B-6 Director. Use the appropriate
ICL kit for this application.
• An off-the-shelf MTP cable up to 100m can be used as an ICL cable when using the standard SWL
optics.
• Brocade supports fully populating a switch with ICL connections using a mixture of 100m SWL and
4x32Gb/s 2 km optics.
• For complete requirements and considerations for using QSFPs to support 2 km on ICL ports, refer to
"Using the QSFPs that support 2 km on ICL ports" in the Fabric OS Administration Guide.
On the core routing blade faceplates, QSFP ports belonging to the same trunking groups are indicated
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.
For details on the following subjects, refer to the "Inter-Chassis Links' section of the Fabric OS
Administration Guide:
• ICL topologies
• ICL trunking
• Configuring ICLs between SAN256B-7 and SAN512B-7 Directors
• Configuring ICLs between SAN256B-7 and SAN512B-7 and SAN384B-2 or SAN768B-2 Directors
• Configuring ICLs between X7 and X6 Chassis
4x32Gb/s 2-Km LWL QSFPs
The 2-km 4x32Gb/s LWL QSFP28 is a hot-swappable, low-voltage (3.3V) digital diagnostic optical
transceiver that supports high-speed serial links over parallel single-mode optical fibers at signaling rates
up to 4×28.05Gb/s. This is a multi-rated CWDM4 QSFP28 transceiver with a duplex LC connector, as in
the following illustration. It supports up to 2-km link length using duplex single-mode fiber. a
Figure 33. QSFP28 Transceiver
1. Pull Tab
2. QSFP Cable
3. QSFP Transceiver
66 IBM Storage Networking SAN256B-7: SAN256B-7 Installation, Service, and User Guide