Latency guideline – Brocade FICON Administrator’s Guide (Supporting Fabric OS v7.3.0) User Manual

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Disables the dynamic domain ID feature and only allows the switch to use a pre-set domain ID. All
switches in a fabric must have a unique domain ID. An insistent domain ID is required with 2-byte
addressing. IDID is the recommended best practice for single byte addressing.

Link incident detection, registration, and reporting

Provides administrative and diagnostic information.

Swap port area IDs (PIDs) of physical ports

Redirects resources from a failed port to a healthy port without changing the mainframe hardware
configuration definition (HCD) settings. This feature, also called "port swapping," is available for
both FICON and open system environments. Swapping PIDs on ports resolves situations in which
the hardware has failed and the channel configurations cannot be changed quickly. Port swpping
has minimal or no impact on other switch features.

Switch connection control (SCC) policy

Includes fabric security methods that prevent unauthorized switches from joining a fabric. SCC
policy is required for cascaded FICON configurations and whenever 2-byte addressing is used.

Traffic Isolation (TI) Zones and Enhanced TI Zones

TI Zones are used to direct traffic across links through a specified path. Enhanced TI Zones allow
you to have ports in more than one TI Zone and to program domain controller routes to
destination domains for F-class traffic, ensuring fabric stability.

NOTE
For more detail on these features and configuration procedures, refer to the Fabric OS Administrator's
Guide
.

Brocade management tools provide further support:

Brocade Network Advisor

Brocade Network Advisor is an optional software program that can be used to manage a fabric
that supports FICON and Fibre Channel Protocol (FCP) devices and traffic. This is the
recommended GUI management tool for FICON environments on B-series enterprise-class
switches. For more information on Brocade Network Advisor, refer to the manual appropriate for
your version requirements:

Brocade Network Advisor SAN + IP User Manual

Brocade Network Advisor SAN User Manual

Web Tools

Web Tools is an embedded GUI-management tool that can be used to manage a Brocade switch
or backbone that supports FICON and Fibre Channel Protocol (FCP) devices and traffic. For more
information on Web Tools, refer to the Web Tools Administrator's Guide.

Latency guideline

The maximum supported distance for a FICON channel is 300 Km (1.5 msec of delay). Synchronous
mirroring applications are generally limited to 100 Km (0.5 msec of delay). Greater distances require
that the FICON Acceleration feature be used with FCIP. The FICON Acceleration feature emulates
control unit response to the channel to make the devices appear closer to the channel than they
actually are.

Latency guideline

12

FICON Administrator's Guide

53-1003144-01

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