Brocade Communications Systems Network Advisor 12.3.0, User Manual

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608 Brocade Network Advisor SAN User Manual
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DCB configuration
16
FIGURE 232
Edit Switch dialog box - QoS tab
4. Select DCB from the Map Type list.
5. Configure the following DCB Map parameters in the DCB Map area:
•
Name - Enter a name to identify the DCB map.
•
Precedence - Enter a value from 1 through 100. This number determines the map’s
priority.
•
Priority Flow Control check box - Check to enable priority-based flow control on individual
priority groups.
•
CoS - Click the CoS cell to launch the Edit CoS dialog box, where you can select and assign
one or more priorities (PG ID 15.0 through 15.7).
All of the eight CoS values (0-7) must be used in a DCB map. Duplicate CoS values in two
or more priority groups are not allowed.
NOTE
You can only edit CoS fields that are displayed with a green tick mark.
% Bandwidth (optional) - While in the Edit CoS dialog box, enter a bandwidth value for PG
IDs 15.0 through 15.7. You must map each CoS to at least one of the PG IDs.
Note the following points:
•
You cannot define a bandwidth percentage for strict priorities (PG ID 15.0-15.7). The
total bandwidth percentage for PG ID 15.0 through 15.7 must equal 0.
•
If you set a CoS value to one or more of the PG IDs 0-7, you must also enter a non-zero
bandwidth percentage. The total bandwidth percentage must equal 100.
•
For PG IDs 0-7 that do not have an assigned CoS value or PFC enabled, the bandwidth
percentage must be 0.