Administrator Guide

Fabric OS Administrator’s Guide 423
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QoS zones
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FIGURE 55 Traffic prioritization in a logical fabric
Supported configurations for QoS zone-based traffic prioritization
The following configuration rules apply to QoS zone-based traffic prioritization:
• All switches in the fabric must be running Fabric OS v6.0.0 or later.
ATTENTION
If QoS traffic crosses an ISL for a switch running a firmware version earlier than Fabric OS
v6.0.0, the frames are dropped.
• By default, all devices are assigned medium priority.
- To be assigned high or low priority, hosts and targets must be connected to a Brocade
8-Gbps or 16-Gbps switch or port blade.
- To preserve the priority level across ISLs, the switches must be running Fabric OS v6.0.0 or
later.
• QoS is enabled by default on 8-Gbps and higher ports. QoS is disabled by default on all 4-Gbps
ports and long-distance ports.
= High priority
Chassis 1 Chassis 2
H1
S1
Domain 1
Domain 2
Base switch
Domain 9
LS2, FID3
Domain 6
LS1, FID1
Domain 5
Base switch
Domain 10
LS4, FID3
Domain 8
LS3, FID1
Domain 7
Domain 3
= E_Ports with QoS enabled
12
1
8
5
3
8
16
14
10
9
11
13
15
17
7
6
4
2