Pfc And Ets Configuration Examples; Using Pfc And Ets To Manage Data Center Traffic - Dell C9000 Series Networking Configuration Manual

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PRIORITY to PG mapping (PRIO2PG) is on the ingress for each port. By default, all priorities are mapped to

PG7. A priority for which PFC has to be generated is assigned to a PG other than PG7 (say PG6) and buffer

watermark is set on PG6 so as to generate PFC.

In ingress, the buffers are accounted at per PG basis and would indicate the number of the packets that has

ingress this port PG but still queued up in egress pipeline. However, there is no direct mapping between the

PG and Queue.

Packet is assigned an internal priority on the ingress pipeline based on the queue to which it is destined. This

Internal-priority to Queue mapping has been modified and enhanced as follows for the device:

PFC and ETS Configuration Examples

This section contains examples of how to configure and apply DCB policies on an interface.

Using PFC and ETS to Manage Data

Center Traffic

The following shows examples of using PFC and ETS to manage your data center traffic.

In the following example:

Incoming SAN traffic is configured for priority-based flow control.

Outbound LAN, IPC, and SAN traffic is mapped into three ETS priority groups and configured for

enhanced traffic selection (bandwidth allocation and scheduling).

Data Center Bridging (DCB)