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Fabric OS v6.4.1 Release Notes v1.0 Page 5 of 62

Quick Look

Fabric OS (FOS) v6.4.1 is a maintenance release based on FOS v6.4.0. All hardware platforms and

features supported in FOS v6.4.0 are also supported in v6.4.1. This release also contains fixes for

many defects including those from the FOS v6.4.0a, b, and c patch releases.

In addition to the fixes noted above and listed in the defect tables at the end of this document, FOS

v6.4.1 also includes support for several features.

Overview

New Features & Support

In addition to fixes for defects, there is new support in FOS v6.4.1 including:

• Support for N_Port Trunking

N_Port TrunkingN_Port Trunking

N_Port Trunking when used in conjunction with Brocade HBAs with v2.3.0 (and later)

software. N_Port Trunking allows two physical 8 Gbps links to be combined into a single logical 16

Gbps link. Use of this feature requires that the Brocade Trunking and SAO licenses are installed on

the FOS-based switch to which the Brocade HBA is connected.

• Support for DCBX Application Protocol Type Length Values (TLV), aka “iSCSI TLV

iSCSI TLViSCSI TLV

iSCSI TLV.” This enables priority

mapping and announcement of support for this mapping to attached devices for iSCSI protocol traffic

over DCB links. This feature is supported and available only for the Brocade 8000.

•

The Brocade FS8-18 Encryption Blade and the Brocade Encryption Switch now support

IBM’s Tivoli

BM’s Tivoli BM’s Tivoli

BM’s Tivoli

Key Lifecycle Manager

Key Lifecycle ManagerKey Lifecycle Manager

Key Lifecycle Manager. IBM Tivoli® Key Lifecycle Manager provides a centralized key management

service for IT organizations that enables them to manage their encryption key lifecycle throughout the

enterprise.

Bottleneck Detection Enhancements

FOS v6.4.0 enhances bottleneck detection

enhances bottleneck detectionenhances bottleneck detection

enhances bottleneck detection capability by adding support for congestion detection at E, Ex and F

support for congestion detection at E, Ex and F support for congestion detection at E, Ex and F

support for congestion detection at E, Ex and F

ports.

ports.ports.

ports. Bottleneck monitoring configuration has been greatly simplified in FOS v6.4.0 by allowing switch-level

enablement of this feature for both latency and congestion bottleneck monitoring. New enhancements allow

users to configure separate thresholds for detecting latency bottleneck and congestion bottleneck conditions.

Bottleneck monitoring alerts can be configured on a per port basis and are delivered through SNMP traps and

RAS logs.

FOS v6.3.1b introduced several changes and enhancements that are also included in FOS v6.4. These

changes are not fully documented in existing Admin Guides or other materials but will be captured in future

documentation and existing documentation updates and revisions. A brief summary of these enhancements

follows:

• General improvements to Bottleneck Detection on both 4G and 8G platforms including improved

improved improved

improved

accuracy on reporting latency

accuracy on reporting latencyaccuracy on reporting latency

accuracy on reporting latency and reporting of latency va

reporting of latency vareporting of latency va

reporting of latency values

lueslues

lues in Bottleneck Detection events.

• Identify credit lost condition

Identify credit lost conditionIdentify credit lost condition

Identify credit lost condition on 4G and 8G E_Ports and generate a RASLOG message (C2-5021) when

detected. Unlike previous reporting that indicated when all credits for a VC were missing, this new

capability reports on individual credit loss. This capability is enabled by default and is not

configurable.

• New option to configure the switch

option to configure the switchoption to configure the switch

option to configure the switch “edge hold time,

edge hold time,edge hold time,

edge hold time,” allowing the switch to timeout frames for F_Ports

sooner than for E_Ports. Proper use of this capability (disabled by default) reduces the likelihood of

devices with high latencies causing frame drops in the core of the fabric and impacting other

unrelated flows. Details on usage and recommended settings will be available in separate

documentation.

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