Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual page 673

Chapter 26 Configuring Fibre Channel Routing Services and Protocols
In-Order Delivery
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
We recommend that you only enable this feature when devices that cannot handle any out-of-order
Tip
frames are present in the switch. Load-balancing algorithms within the Cisco MDS 9000 Family ensure
that frames are delivered in order during normal fabric operation. The load-balancing algorithms based
on source FC ID, destination FC ID, and exchange ID are enforced in hardware without any performance
degradation. However, if the fabric encounters a failure and this feature is enabled, the recovery will be
delayed because of an intentional pausing of fabric forwarding to purge the fabric of resident frames that
could potentially be forwarded out-of-order.
Cisco MDS 9000 Family CLI Configuration Guide
26-15
OL-18084-01, Cisco MDS NX-OS Release 4.x