Qos Dot1P Traffic Classification And Queue Assignment - Dell Force10 S4810P Configuration Manual

Task
Set PFC buffering on the DCB stack unit.
Note: Save the configuration and reboot the system to save the pfc buffering configuration changes.
FTOS Behavior:
DCB is not supported if you enable link-level flow control on one or more interfaces (refer to
Pause Frames on page

QoS dot1p Traffic Classification and Queue Assignment

DCB supports PFC, ETS, and DCBx to handle converged Ethernet traffic that is assigned to an egress
queue according to the following quality of service (QoS) methods:
• Honor dot1p: Using the
can honor dot1p priorities in ingress traffic at the port or global switch level (refer to
Queue Mapping).
• 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 (refer to
Note: Dell Force10 does not recommend mapping all ingress traffic to a single queue when using PFC
and ETS. Ingress traffic classification using the
Important: of two
recommended 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
number of two lossless queues supported on a port (refer to
Although FTOS allows you to change the default dot1p priority-queue assignments (refer to
Priorities for Incoming
mapping is reconfigured. If the configured DCB policy remains valid, the change in the dot1p-queue
assignment is allowed.
Command
dcb stack-unit all
pfc-buffering
pfc-ports 64
pfc-queues 2
469).
service-class dynamic dot1p
Traffic), DCB policies applied to an interface may become invalid if dot1p-queue
Command Mode
CONFIGURATION
command in INTERFACE configuration mode, you
Policy-based QoS
service-class dynamic dot1p
Configuring Lossless
Ethernet
Default dot1p to
Configurations).
command (honor dot1p) is
Table 13-1 and the maximum
Queues).
Set dot1p
Data Center Bridging (DCB) | 307