Administrator Guide

information, refer to Link Layer Discovery Protocol (LLDP). The following LLDP TLVs are supported for DCB
parameter exchange:
PFC parameters PFC Configuration TLV and Application Priority Configuration TLV.
ETS parameters ETS Configuration TLV and ETS Recommendation TLV.
Creating a DCB Map
Configure the priority-based flow control (PFC) and enhanced traffic selection (ETS) settings in a DCB map
before you can apply them on downstream server-facing ports.
NOTE
: This feature is supported only on PMUX mode.
1 Create a DCB map to specify the PFC and ETS settings for groups of dot1p priorities.
CONFIGURATION mode
dcb-map name
2 Configure the PFC setting (on or off) and the ETS bandwidth percentage allocated to traffic in each
priority group or whether priority group traffic should be handled with strict priority scheduling.
DCB MAP mode
priority-group group_num {bandwidth percentage | strict-priority} pfc {on |
off}
3 Specify the priority group ID number to handle VLAN traffic for each dot1p class-of-service: 0 through 7.
Leave a space between each priority group number.
DCB MAP mode
priority-pgid dot1p0_group-num dot1p1_group-num dot1p2_group-num dot1p3_group-
num dot1p4_group-num dot1p5_group-num dot1p6_group-num dot1p7_group-num
Important Points to Remember
• If you remove a dot1p priority-to-priority group mapping from a DCB map (the no priority pgid
command), the PFC and ETS parameters revert to their default values on the interfaces on which the
DCB map is applied. By default, PFC is not applied on specific 802.1p priorities; ETS assigns equal
bandwidth to each 802.1p priority.
• To change the ETS bandwidth allocation configured for a priority group in a DCB map, do not modify
the existing DCB map configuration. Instead, first create a new DCB map with the desired PFC and ETS
settings and apply the new map to the interfaces to override the previous DCB map settings. Then
delete the original dot1p priority-priority group mapping.
Data Center Bridging (DCB) 280