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e1000e ドライバーで RX drop が発生する

Solution Unverified - Updated -

Issue

  • インターフェイス eth1 で RX-DRP のカウントが上昇しています。
netstat -i
Kernel Interface table
Iface MTU    Met RX-OK      RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP TX-OVR Flg
bond0 1500   0   2662386193    0      0      0 2806975752   0   0   0 BMmRU
eth0  1500   0   2591515322    0      0      0 2806975752   0   0   0 BMsRU
eth1  1500   0   1105491112    0 58236888    0 98715028     0   0   0 BMRU
eth2  1500   0   70870871      0      0      0        0     0   0   0 BMsRU
lo    16436  0   1718140323    0      0      0 1718140323   0   0   0 LRU

# ethtool -S eth1
NIC statistics:

     rx_missed_errors: 58292301

 Have increased the RX ring buffers:

 # ethtool -g eth1

Ring parameters for eth1:
Pre-set maximums:
RX:             4096
RX Mini:        0
RX Jumbo:       0
TX:             4096
Current hardware settings:
RX:             4096
RX Mini:        0
RX Jumbo:       0
TX:             4096

この問題の根本的な原因は何ですか?

Environment

  • Red Hat Enterprise Linux 5.4

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