Brocade Fabric OS Administrators Guide (Supporting Fabric OS v7.3.0) - Manual (Page 384)

• Define QoS zones in each edge fabric.
• Define LSAN zones in each edge fabric.
• Enable QoS on the E_Ports in each edge fabric.
• Enable QoS on the EX_Ports in the backbone fabric.
Refer to Setting QoS zone-based traffic prioritization over FC routers on page 387 for detailed
instructions.
The following are requirements for establishing QoS over FC routers:
• QoS over FC routers is supported in Brocade native mode only. It is not supported in interopmode 2
or interopmode 3.
• QoS over FC routers is supported for the following configurations:
‐ Edge-to-edge fabric configuration: Supported on all platforms.
‐ Backbone-to-edge fabric configuration: Supported on 16-Gbps-capable platforms only
(Brocade 6505, 6510, 6520, M6505, 6547, 6548, and Brocade DCX 8510 Backbone
family), and only if no other platforms are used. For all other platforms, you cannot
prioritize the flow between a device in an edge fabric and a device in the backbone fabric.
• QoS over FC routers is supported only if Virtual Fabrics is disabled in the backbone fabric. QoS
over FC routers cannot be enabled if Virtual Fabrics is also enabled in the backbone fabric.
• The port WWN of the host or target and the port WWN of the proxy device must be in both an LSAN
zone and a QoS zone.
• QoS over FC routers is supported on both EX_Ports and VEX_Ports.
• The EX_Ports (or VEX_Ports) in the path between the QoS devices must be on switches running
Fabric OS v6.3.0 or later.
• QoS zones must use WWN notation only; D,I notation is not supported for QoS over FCRs.
Virtual Fabrics considerations for QoS zone-based traffic prioritization
You can prioritize flows between devices in a logical fabric. The priority is retained for traffic going
across ISLs and through the base fabric XISLs.
For example, the following figure shows a logical fabric that includes H1 and S1. To set the traffic
between H1 and S1 to high priority, create a QoS zone in the logical fabric with H1 and S1 as
members. Then enable QoS on all of the E_Ports shown circled in the figure, including all of the
E_Ports in the XISLs (ports 10, 11, 12, 13, 14, 15, 16, and 17).
Virtual Fabrics considerations for QoS zone-based traffic prioritization
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