Administrator Guide

of PFC parameters between peer devices. PFC allows network administrators to create zero-loss links for
Storage Area Network (SAN) traffic that requires no-drop service, while retaining packet-drop congestion
management for Local Area Network (LAN) traffic.
To ensure complete no-drop service, apply the same dcb-map on all PFC and ETS enabled interfaces.
1 Create a DCB map to apply priority based flow control or enhanced transmission selection for specified
priority groups and priorities.
CONFIGURATION mode
dcb-map map-name
The maximum is 32 alphanumeric characters.
2 Configure the priority group with PGID, bandwidth percentage or strict priority for ETS and PFC mode.
DCB-MAP mode
priority-group pg_num [bandwidth percentage | strict-priority] pfc [on | off]
pg_num range is from 0 to 7.
bandwidth percentage range is from 1 to 100.
Either strict-priority or bandwidth percentage can be set for ETS on the priority group.
PFC can either be enabled or disabled for the priority group.
3 Configure the priorities to priority group.
DCB-MAP mode
priority-pgid <pgid> <pgid> <pgid> <pgid> <pgid> <pgid> <pgid> <pgid>
pgid range is from 0 to 7.
Configure priority to priority group mapping from priority 0 to priority 7 in order.
4 Exit the DCB MAP configuration mode.
DCB-MAP mode
exit
5 Enter interface configuration mode.
CONFIGURATION mode
interface type slot/port
6 Apply the dcb-map with PFC and ETS configurations to both ingress and egress interfaces.
INTERFACE mode
dcb-map map-name
7 Repeat steps 1 to 6 on all PFC and ETS enabled interfaces to ensure lossless traffic service.
NOTE: All these configurations are available only in PMUX mode and you cannot perform these
configurations in Standalone mode.
Dell Networking OS Behavior: As soon as you apply a DCB MAPwith PFC enabled on an interface, DCBx
starts exchanging information with PFC-enabled peers. The IEEE802.1Qbb, CEE, and CIN versions of PFC
Data Center Bridging (DCB) 285