Hello, I've encountered an unexpected error configuring RDMA/ROCEV2 with one of our 200G ConnectX6 NICS. This issue reproduces consistently on 5.4.249 and 6.4.3. dmesg output: [ 9.863871] mlx5_core 0000:01:00.0: mlx5_cmd_out_err:803:(pid 1440): SET_ROCE_ADDRESS(0x761) op_mod(0x0) failed, status bad parameter(0x3), syndrome (0x63c66), err(-22) [ 9.881250] infiniband mlx5_2: add_roce_gid GID add failed port=1 index=0 [ 9.889095] __ib_cache_gid_add: unable to add gid fe80:0000:0000:0000:ad3e:e3ff:fe92:b31b error=-22 Device Type: ConnectX6 Part Number: MCX653105A-HDA_Ax Description: ConnectX-6 VPI adapter card; HDR IB (200Gb/s) and 200GbE ... PSID: MT_0000000223 PCI Device Name: 0000:01:00.0 Firmware is up to date. LINK_TYPE is to ETH(2) and ROCE_CONTROL is ROCE_ENABLE(2). Has anyone seen this syndrome? Any advice or assistance is appreciated. Thanks, -Jonathan