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Scalability Improvement
FOS v7.4 increases the scalability limit supported by Flow Vision. In particular, the total number of sub-flows
supported by chassis switches is increased to 2048 and by fixed port switches is increased to 512.
Identify All Devices in a Flow
FOS v7.4 supports displaying all zoned devices in a flow by introducing a new option -allzoned to the Flow
Vision command. This will identify all zoned devices for a flow defined on an E_Port or F_Port.
Fabric Flow Dashboard
FOS v7.4 introduces support of a Flow Dashboard that provides information for a flow from all the available
data points in the fabric through which it can pass. With all relevant data summarized for a flow of interest,
users are able to more easily troubleshoot and identify the root cause of various issues that may occur.
ClearLink Diagnostic (D_Port) Enhancements
FOS v7.4 implements the following D_Port feature enhancements.
Link Power (dB) Loss Calculation
FOS v7.4 supports calculating TX and RX power loss of a link with D_Port tests. D_Port tests include the power
loss calculation to provide additional details on the health of physical media of links.
Dynamic D_Port and On-demand D_Port with DWDM
FOS v7.4 enhances D_port pre-provision feature to allow administrators to pre-provision certain ports
connected to DWDM links. With the pre-provisioned list, dynamic D_port and on-demand D_port tests can start
automatically on those ports with the optical loopback test skipped.
CLI Command Hierarchical Help Display
FOS v7.4 enhances the help page for D_port CLI commands so that only the relevant sub-options are displayed
when a command action is specified for the portCfgDport and portDportTest commands.
Peer Zoning Support
FOS v7.4 introduces support for Peer Zoning as defined in the FC-SW-6 and FC-GS-7 standard. In a Peer Zone
configuration, membership in a zone is differentiated into principal members and non-principal or peer
members. Peer Zoning configuration allows communication between a principal member and any peer
member but does not allow communication between two peer members or between two principal members. By
adopting Peer Zoning, users can simplify zoning configuration and management, improve performance, and
increase scalability.
Target Driven Zoning support
FOS v7.4 introduces the Target Driven Zoning feature that allows end devices to create Peer Zone
configurations through inband commands. This feature enables zoning to be configured by management
software on storage devices and reduces the manual configuration needed on switches.
Lossless DLS enhancement
FOS v7.4 introduces a routing enhancement to support lossless Dynamic Load Sharing (DLS) in a 2-hop
topology. This enhancement allows adding links or switches in existing paths that are up to 2 hops between a
host and a target, including the new link that is coming online, to ensure lossless and in-order frame delivery.
Fabric OS 7.4.1a Release Notes v3.0
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