Administrators Guide (Supporting Fabric OS v7.3.0) Manual
The precedence value controls QoS scheduling policies. The scheduler gives precedence to the
highest precedence value.
When the DCB Map Configuration dialog box displays, the default values shown in the Priority
Group Map match the IEEE 802.1Q recommendation for systems supporting eight traffic classes.
The Priority Group Map displays the Layer 2 Cos values mapped to Priority Group ID (PGID).
PGID values are in the form <policy>.<priority>. A policy value of 15 indicates Priority values run
from 0 (highest priority) to 7 (lowest priority). Note that this is contrary to the CoS values, which run
from 7 (highest priority) to 0 (lowest priority).
6. Create a new priority group by clicking Add next to the Priority Group table.
An entry is added to the Priority Group table.
NOTE
When you add an entry, a PGID is automatically assigned. The PGID is an integer from 0 to 7. The
first added entry is given a PGID of 0, and the PGID increments by one for each additional added
entry until a PGID of 7 is reached.
7. Edit the Bandwidth entry to indicate the desired percentage of total bandwidth.
8. Change the Priority Flow Control Status to Enabled to enable PFC for the entry.
9. Click OK.
The new priority group displays in the Priority Group Map.
Adding a traffic class map
CoS priorities can be mapped to traffic classes using a traffic class map.
1. Select the DCB tab on the Switch Administration window.
2. Select the QoS tab.
3. Select the Traffic Class Map tab.
4. Select Add.
The Traffic Class Map Configuration dialog box displays.
NOTE
This dialog box has the same structure as the Priority Group Map in the DCB Configuration
dialog box. The default CoS-to-traffic class structure is based on IEEE 802.1Q recommendations,
as in the default Priority Group Map.
5. Enter a name for the traffic class map in the Name field.
6. Select the Traffic Class that you want to assign to the CoS priority.
7. Click OK.
LLDP-DCBX configuration
Link Layer Discovery Protocol (LLDP) is a IEEE standard for collecting and distributing device
information. Data Center Bridging Exchange (DCBX) extends LLDP by providing a protocol for
discovering, initializing, and managing DCB-compliant devices.
There are two configuration procedures:
Adding a traffic class map
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