Qos Dot1P Traffic Classification And Queue Assignment - Dell S4048–ON Configuration Manual

S-series 10gbe switches

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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:

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

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 Networking does not recommend mapping all ingress traffic to a single queue when using PFC and ETS.

However, Dell 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

Although Dell Networking OS allows you to change the default dot1p priority-queue assignments (refer to

Priorities for Incoming

mapping. If the configured DCB policy remains valid, the change in the dot1p-queue assignment is allowed.

NOTE: Although, each port on the S4810, S4820T, and S5000 devices support 8 QoS queues, you can configure only 4

QoS queues (0-3) to manage data traffic. The remaining 4 queues (4-7) are reserved for control traffic.

dot1p Value in

Egress Queue Assignment

the Incoming

dot1p Value in

Egress Queue Assignment

the Incoming

Traffic), DCB policies applied to an interface may become invalid if you reconfigure dot1p-queue

Configuring Lossless

Setting dot1p

Data Center Bridging (DCB)