Deployment Guide

To configure the port octet speed combination, perform the following steps.
1. Select the Port Admin tab.
2. Select View > Advanced mode.
3. Select the FC Ports tab.
4. In the FC Ports Explorer dialog box, select a port to configure.
FIGURE 18 FC Ports Explorer dialog box
5. Select Speed Combination from the Actions list.
The Port Octet Speed Combination dialog box displays.
FIGURE 19 Port Octet Speed Combination dialog box
6. Select a speed combination and click OK.
Configuring CSCTL
Unlike the QoS Zone-based FC flow prioritization method, CSCTL enables the same SID/DID pair
exchange frames with different priorities.
To be able to prioritize a frame flow between two end nodes, Fabric OS v7.0.0 and later provide
support for up to 32 virtual channels (VCs) per port. This categorizes the frames entering into a fabric
on the basis of preset behavior defined with these VCs, and conserves the frame’s behavior until it is
transmitted out of fabric. However, out of the 32 VCs for each external port, only 16 are used.
With the CSCTL method of prioritization, there is no need to have explicit traffic segregation, such as
QOS_H, QOS_M, and QOS_L. The classification is entirely based upon the CSCTL database
programmed into the ASIC. As the name suggests, CSCTL bits in each frame are used to define the
VC number on the transmit port.
In order to achieve this kind of classification, Fabric OS v7.0.0 and later provides a CSCTL database
table on each chip, capable of storing 256 entries. Each entry in the database table is populated with a
Configuring CSCTL
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