FCoE Cookbook for HP Virtual Connect Version 4.20 Firmware Enhancements May 2014

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Quality of Service in the Virtual Connect Domain
It is not necessary to enable any particular QoS settings in the VC Domain to provide Quality of Service for the FCoE
traffic. The moment FCoE is configured, Virtual Connect provides lossless service for the FCoE traffic.
By default, the VC QoS configuration mode is Passthrough. In this mode, two classes of service are provided, one for
FCoE with lossless service and one for Ethernet without any form of flow control.
To improve the Ethernet traffic service level control and make VC to take a specific action on a specified classified traffic,
the VC QoS settings can be changed from Passthrough to Custom (with FCoE Lossless). In this mode, VC monitors the
Ethernet traffic for Layer 2 802.1p Priority bits, or Layer 3 DSCP or ToS markings and places packets on the pre-defined
egress queues. The Ethernet traffic is then prioritized based on the traffic classification.
Optional VCM QoS Configuration
 On the Virtual Connect Manager screen, click Configure then Quality of Service (QoS).
 Change the default Pass-through mode to Custom (with FCoE Lossless).