Iodset - HP StorageWorks MSA 2/8 - SAN Switch Reference Manual

Fabric OS Commands

iodSet

Enable the In Order Delivery (IOD) option.
Synopsis
iodSet
Availability
Admin
Release
V3.1.x and V4.1.x
Description
Use this command to enforce in order delivery of frames during a fabric topology
change.
In a stable fabric, frames are always delivered in order, even when the traffic
between switches is shared among multiple paths. However, when topology
changes occur in the fabric (for instance, a link goes down), traffic is rerouted
around the failure. When topology changes occur, generally, some frames are
delivered out of order. This command insures that frames are not delivered
out-of-order, even during fabric topology changes.
The default behavior is for the IOD option to be off. HP configurations require
that IOD be set to a 1 to ensure in order delivery of frames.
This command should be used with care, because it can cause a delay in the
establishment of a new path when a topology change occurs. Only if there are
devices connected to the fabric that do not tolerate occasional out of order delivery
of frames, should this command be used.
Operands
None.
378 Fabric OS Version 3.1.x/4.1.x Reference Guide