Reference Guide

Brocade Fabric OS Command Reference 421

53-1004112-02

iodSet

Enables in-order delivery (IOD).

Synopsis iodset

iodset --help

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 and some frames might be delivered out of order. This command ensures that frames

are not delivered out-of-order, even during fabric topology changes. It enforces a sufficient delay between the

event that causes an existing path to be removed and the establishment of a new path, so that frames are delivered

in order. However, this also means that frames are dropped during the delay, causing I/O failures.

When used without operands, iodSet enables in-order-delivery of frames on a switch (legacy IOD behavior).

Frame loss is unavoidable when a port goes down.

IOD is disabled by default. Use iodShow to display current settings. Use iodReSet to restore the default setting.

Notes The execution of this command is subject to Virtual Fabric restrictions that may be in place. Refer to "Using Fabric

OS Commands" and "Command Availability" for details.

Operands This command has the following operands:

--help

Displays the command usage.

Examples To display the default legacy IOD setting:

switch:admin> iodshow

IOD is not set

To enable IOD:

switch:admin> iodset

IOD is set