HP B-series Embedded Switches Bedienungsanleitung PDF herunterladen (Seite 145)

Updating Switches to the Core PID Addressing

145Fabric OS Procedures Version 3.1.x/4.1.x User Guide

Recommendations

Redundant fabrics and multi-pathing software are recommended for

uptime-sensitive environments. If redundant fabrics are not used, there are

numerous possible failure cases and even routine maintenance scenarios that can

result in application downtime. This is true for any currently available Fibre

Channel technology.

Examples of scenarios protected by redundant fabrics include:

■ Add/move/change operations for devices or switches

■ Major upgrades/changes to fabric architecture

■ Physical disasters

■ Changing the Core PID format

■ Changing any other fabric-wide parameters, for example ED_TOV

■ Erroneous zoning changes/user error

New Fabrics

For new fabrics, the PID format should always be set to the larger port count

addressing method before the fabric enters production. When updating an existing

SAN, there are several scenarios which must be evaluated before changing the

PID format.

Proactively setting the core PID format on new fabrics is strongly recommended

to save potential administrative effort later on. There is no difference in the

behavior of a fabric with either PID format.

Core PID is enabled by default on 4.x switches (Core Switch 2/64 or SAN Switch

2/32). Use the configure command to enable Core PID on 2.x and 3.x switches

before mixing with a 4.x switch fabric.

Existing Fabrics

When a switch with the larger port count format is introduced into an existing

fabric, the core PID format must be set on all switches in the fabric to prevent

segmentation. This does not require application downtime if redundant fabrics are

used. If redundant fabrics are not in use, it is necessary to schedule an outage for

the fabric.

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HP B-series Embedded Switches Bedienungsanleitung Seite 145