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The following describes the priority group-bandwidth assignment.
Priority Group Bandwidth Assignment
IPC 5%
SAN 50%
LAN 45%
PFC and ETS Configuration Command Examples
The following examples show PFC and ETS configuration commands to manage your data center traffic.
1. Enabling DCB
DellEMC(conf)#dcb enable
2. Configure DCB map and enable PFC, and ETS
DellEMC(conf)# service-class dynamic dot1p
Or
DellEMC(conf)# interface tengigabitethernet 1/1
DellEMC(conf-if-te-1/1)# service-class dynamic dot1p
3. Apply DCB map to relevant interface
dcb-map test
priority-group 1 bandwidth 50 pfc on
priority-group 2 bandwidth 45 pfc off
priority group 3 bandwidth 5 pfc on
priority-pgid 2 2 2 1 3 2 2 2
Example of Applying DCB Map to an Interface
DellEMC(conf)# int tengigabitethernet 1/1
DellEMC(conf-if-te-1/1)# dcb-map test
QoS dot1p Traffic Classification and Queue
Assignment
The following section describes QoS dot1P traffic classification and assignments.
DCB supports PFC, ETS, and DCBx to handle converged Ethernet traffic that is assigned to an egress queue according to the
following QoS methods:
Honor dot1p
You can honor dot1p priorities in ingress traffic at the port or global switch level (refer to Default dot1p to
Queue Mapping) using the service-class dynamic dot1p command in INTERFACE configuration
mode.
Layer 2 class
maps
You can use dot1p priorities to classify traffic in a class map and apply a service policy to an ingress port
to map traffic to egress queues.
NOTE: Dell EMC Networking does not recommend mapping all ingress traffic to a single queue when using PFC and ETS.
However, Dell EMC Networking does recommend using Ingress traffic classification using the service-class dynamic
dot1p command (honor dot1p) on all DCB-enabled interfaces. If you use L2 class maps to map dot1p priority traffic to
egress queues, take into account the default dot1p-queue assignments in the following table and the maximum number of
two lossless queues supported on a port (refer to Configuring Lossless Queues).
264 Data Center Bridging (DCB)