Dell S3048-ON EMC Solutions for Microsoft Azure Stack HCI Networking Guide - Page 55
Switch DCB validation commands
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11 Switch DCB validation commands If DCB is used, the commands in this section will help verify DCB is configured correctly. The commands and output shown are for S5248F-Leaf1A. The output of its peer, S5248F-Leaf1B, is similar. 11.1 Show queuing statistics Queuing statistics can be viewed to verify that traffic is applied to the correct queues and that storage and cluster heartbeat traffic (queues 3 and 5 respectively) is not dropped under heavy network loads. S5248F-Leaf1A# show queuing statistics interface ethernet 1/1/1 Interface ethernet1/1/1 Queue Packets Bytes Dropped-Packets 0 32082748 89906196746 17774345 1 0 0 0 2 0 0 0 3 21947244 90065497612 0 4 0 0 0 5 1567 655233 0 6 0 0 0 7 0 0 0 Dropped-Bytes 26742951754 0 0 0 0 0 0 0 Note: The Dropped-Packets and Dropped-Bytes for LAN traffic (CoS 0/Queue 0) shown in the output above are the results of sending an overwhelming amount of LAN traffic over the physical storage links with an IXIA traffic generator. This was done to verify DCB was configured correctly and that no storage or cluster heartbeat traffic was dropped. 11.2 Show interface priority flow control This command shows the count of PFC pause frames received and transmitted on each interface. Pause frames are sent under heavy loads to ensure frames are not dropped. In this example, pause frames were received from the host interface for CoS 3 and 5 traffic. S5248F-Leaf1A# show interface ethernet 1/1/1 priority-flow-control details ethernet1/1/1 Admin Mode : true Operstatus: true PFC Priorities: 3,5 Total Rx PFC Frames: 574 Total Tx PFC frames: 20 Cos Rx Tx 0 0 0 1 0 0 2 0 0 3 287 20 4 0 0 5 287 0 6 0 0 7 0 0 55 Dell EMC Solutions for Microsoft Azure Stack HCI Networking Guide