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522 Fabric OS Administrator’s Guide
53-1002745-02
CS_CTL-based frame prioritization
21
NOTE
If a switch is running a firmware version earlier than Fabric OS v6.0.0, 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 and disabling CS_CTL-based frame prioritization on ports
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.
1. Connect to the switch and log in to an account that has admin permissions.
2. Enter the portcfgqos command.
portcfgqos --enable [slot/]port csctl_mode
3. Enter y at the prompt to override QoS zone-based traffic prioritization.
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. Enter the portcfgqos command.
portcfgqos --disable [slot/]port csctl_mode
Using CS_CTL auto mode at the chassis level
You can use the CSCTL QoS Mode options for the configureChassis CLI command to change from
the chassis-wide default mode (see Table 77 on page 521), 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]