Users Guide

418 Fabric OS Administrator’s Guide
53-1002920-02
CS_CTL-based frame prioritization
14
Disabling CS_CTL-based frame prioritization on ports
When you disable CS_CTL-based frame prioritization, QoS zone-based traffic prioritization is
restored if it had been previously enabled.
1. Connect to the switch and log in to an account that has admin permissions.
2. Disable CS_CTL mode:
portcfgqos --disable [slot/]port csctl_mode
Alternatively, you can disable CS_CTL mode and set QoS to auto-enable (AE):
portcfgqos --default [slot/]port csctl_mode
Using CS_CTL auto mode at the chassis level
You can use the CS_CTL QoS mode options for the configureChassis CLI command to change the
chassis-wide default mode (refer to Table 72 on page 417), as in the following example.
switch:admin> configurechassis
Configure...
cfgload attributes (yes, y, no, n): [no] y
Enforce secure config Upload/Download (yes, y, no, n): [no]
Enforce signature validation for firmware (yes, y, no, n): [no]
Add Suffix to the uploaded file name (yes, y, no, n): [no]
Custom attributes (yes, y, no, n): [no] y
Config Index (0 to ignore): (0..1000) [0]
system attributes (yes, y, no, n): [no] y
system.blade.bladeFaultOnHwErrMsk: (0x0..0x7fffffff) [0x0]
system.cpuLoad: (10..121) [121]
system.i2cTurboCnfg: (0..2) [1]
fos attributes (yes, y, no, n): [no] y
CSCTL QoS Mode (0 = default; 1 = auto mode): (0..1) [1]
Set CSCTL QoS Mode to 1 to enable auto mode, establishing the settings shown in Table 73 on
page 417. Set CSCTL QoS Mode to 0 to disable auto mode and revert to default settings, shown in
Table 72 on page 417.
NOTE
As noted previously, this is a chassis-level configuration. It does not provide options to enable
CS_CTL QoS on the ports.
Considerations for using CS_CTL-based frame prioritization
To use CS_CTL for QoS on a given port for a given flow, proceed with the following steps.
1. Determine whether to use the default mode (refer to Table 72 on page 417) or the auto mode
(refer to Table 73 on page 417). No choice results in the default mode.
2. In either case, ensure that the switch port connected to the initiator host and the switch port
connected to the target host have csctl_mode enabled, as in “Enabling CS_CTL-based frame
prioritization on ports” on page 417.