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Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

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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).
  • One lossless queue is used.
Figure 1. PFC and ETS Applied to LAN, IPC, and SAN Priority Traffic Illustration of PFC and ETS applied to LAN, IPC, and SAN priority traffic.

QoS Traffic Classification: The service-class dynamic dot1p command has been used in Global Configuration mode to map ingress dot1p frames to the queues shown in the following table. For more information, refer to QoS dot1p Traffic Classification and Queue Assignment .

dot1p Value in Incoming FrameQueue Assignment
0 0
1 0
2 0
3 1
4 2
5 3
6 3
7 3

The following describes the dot1p-priority class group assignment

dot1p Value in the Incoming FramePriority Group Assignment
0 LAN
1 LAN
2 LAN
3 SAN
4 IPC
5 LAN
6 LAN
7 LAN

The following describes the priority group-bandwidth assignment.

Priority GroupBandwidth 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.

Example of Configuring QoS Priority-Queue Assignment to Honor Dot1p Priorities

Dell(conf)# service-class dynamic dot1p
                                 
                              

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