Manualshelf

Fabric OS Administrator's Guide v7.0.0 (53-1002148-02, June 2011)

ManualsBrandsHP ManualsSoftwareHP StorageWorks ISL quick loop
451452453454455456457458459460
Fabric OS Administrator’s Guide 415
53-1002148-02
Enabling CS_CTL-based frame prioritization
20
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 v6.0.0 or later.
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 CS_CTL-based frame prioritization
When you enable CS_CTL-based frame prioritization, you should 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.
Disabling CS_CTL-based frame 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
QoS zone-based traffic prioritization
QoS zone-based traffic prioritization allows you to categorize the traffic flow between a host and
target as having a high or low priority. For example, you could assign online transaction processing
(OLTP) to high priority and backup traffic to low priority.
All flows without QoS prioritization are considered medium priority.