IBM SAN512B-6, Installation, Service And User Manual

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For more information on ICLs and configuring ICL trunking between core routing
blades on GEN6 and GEN5 switches, refer to the "Inter-Chassis Links" in theFabric
OS Administrator's Guide.
For more information recommended cabling topologies for ICLs, refer to“ICL
cabling configurations.”
Note: You cannot configure ISLs using ports on port blades and QSFP-based ICLs
using ports on core routing blades concurrently on the same chassis.
ICL cabling configurations
The following figures show acceptable cabling configurations for the inter-chassis
link (ICL) feature between QSFP ports in core routing blades. The recommended
topology is the parallel type where at least four QSFP cables connect between both
core routing blades on any two switches. This provides ICL trunking between
switches, ensuring redundancy. Parallel connections between core blades are
recommended.
The following are the maximum number of directors that can e connected using
4x32-Gbps quad SFP (QSFP) inter-chassis links (ICLs):
v Up to nine X6 (GEN6) directors can be connected in a full-mesh topology.
v Up to six directors are recommended in a full-mesh topology if connecting a
mixture of X6 and GEN5 directors.
v Up to 12 directors can be connected in a core-to-edge topology.
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SAN512B-6 Installation, Service, and User Guide