跳转到主内容

DSCP 26 未应用于 NFS over RDMA 流量

Views:
Visibility:
Public
Votes:
0
Category:
ontap-9
Specialty:
nas
Last Updated:

适用于

  • ONTAP 9
  • 支持 RoCE 的数据 LIF 上的 NFS over RDMA (NFSv4.1,proto=rdma)
  • 具有 NVIDIA/Mellanox NIC 的 Linux NFS 客户端

问题

  • RDMA 已根据“Configure NICs for NFS over RDMA”指南进行配置。
  • 来自 ONTAP 的传出 NFS over RDMA 数据包在交换机上显示 DSCP 0,而传入的客户端数据包显示 DSCP 26。
  • 数据包跟踪显示所有带有 DSCP 0 的 ONTAP 数据包。客户端 RDMA 连接管理器(CM)ConnectRequest 数据包通告 Primary Traffic Class: 0x00。

frame 78 (logs/pktt/frame78_req_decode.txt)
802.1Q Virtual LAN, PRI: 0, DEI: 0, ID: 32
Internet Protocol Version 4, Src: 10.x.x.x, Dst: 10.x.x.x
0000 00.. = Differentiated Services Codepoint: Default (0)
Opcode: Unreliable Datagram (UD) - SEND only (100) <- CM message on QP1
Attribute ID: 0x0010 <- ConnectRequest
Destination Port: 0x4e51 <- 20049, NFS over RDMA
Local QPN: 0x001522
Primary Traffic Class: 0x00
0000 .... = Primary SL: 0x0

  • 自启动以来,ONTAP NIC 计数器 prio3_tx_frames 保持为 0,而客户端和交换机 DSCP 信任、DSCP 26 到优先级 3 的映射以及 PFC 设置均正确。

Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.