The intel 82599 NIC connected server(windows server 2008) via FCoE.When I runned read IO,it is work properly .But When I write IO with block size 1M,it will loss packets.
ethtool -S eth5 statistic shows:
read:
rx_missed_errors: 0
tx_flow_control_xon: 0
rx_flow_control_xon: 26004
tx_flow_control_xoff: 0
rx_flow_control_xoff: 26004
The flow control works properly and no packets dropped.
write:
rx_missed_errors: 62295
tx_flow_control_xon: 272
rx_flow_control_xon: 0
tx_flow_control_xoff: 344
rx_flow_control_xoff: 0
The flow control seems does not work properly and many packets droppeed. Is the link partner not honoring the flow control packets!
windows server 2008 FCoE configuration box:
DCBx Version:IEEE 802.1Qaz
Priority Group:Feature not present in peer TLV
Priority Flow Control:Operational
FCoE Status:Feature not present in peer TLV
Why is there differerent between read and wirte in the same environment?
What is the meanning of "tx_flow_control_xon"?
Appreciate your answer
