Prioritization – Brocade Fabric OS Administrators Guide (Supporting Fabric OS v7.3.0) User Manual
Page 379
Mapping of CS_CTL values to QoS priority for frame prioritization in CS_CTL default
mode (Continued)
TABLE 75
CS_CTL value
Priority
17-24
High
Alternatively, the user can apply CS_CTL auto mode. The CS_CTL auto mode uses only three CS_CTL
values, as illustrated in
Mapping of CS_CTL values to QoS priority for frame prioritization in CS_CTL auto mode
TABLE 76
CS_CTL value
Priority
1
Low
2
Medium
3
High
NOTE
The values in the tables represent chassis-level configurations. For configuration details, refer to
CS_CTL auto mode at the chassis level
on page 380, and
Considerations for using CS_CTL-based
on page 380.
Supported configurations for CS_CTL-based frame prioritization
CS_CTL-based frame prioritization is supported on all 8-Gbps and 16-Gbps platforms.
All switches in the fabric should be running Fabric OS v6.3.0 or later.
NOTE
If a switch is running a firmware version earlier than Fabric OS v6.3.0, the outgoing frames from that
switch lose their priority.
High availability considerations for CS_CTL-based frame prioritization
If the standby CP is running a Fabric OS version earlier than 6.3.0 and is synchronized with the active
CP, then you cannot enable CS_CTL-based frame prioritization on the active CP. If the standby CP is
not synchronized or if no standby CP exists, then enabling CS_CTL-based frame prioritization
succeeds.
Enabling CS_CTL-based frame prioritization on ports
Make sure that the CS_CTL mode-enabled source and destination are zoned together.
When you enable CS_CTL-based frame prioritization, you must enable it on both the source port and
the destination port, so that the frames returned from the destination port for a given exchange always
have the same CS_CTL prioritization as the frames originating from the source port.
Supported configurations for CS_CTL-based frame prioritization
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