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ifconfigs 出力で RX 行の overrun 値が高くてもドロップがありませんが、overrun は何を指していますか?

Solution Unverified - Updated -

Issue

  • 一部のインターフェイスで RX 行の overrun 値が高いですが、ドロップは発生しません。
  • オーバーランが発生する理由は?
  • オーバーランによってパフォーマンスは下がりますか?
# ifconfig bond1
bond1     Link encap:Ethernet  HWaddr 00:17:A4:77:C8:04
          inet addr:192.168.11.100  Bcast:192.168.11.255  Mask:255.255.255.0
          inet6 addr: fe80::217:a4ff:fe77:c804/64 Scope:Link
          UP BROADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1
          RX packets:2695936306 errors:4839818 dropped:0 overruns:4839818 frame:0
          TX packets:2649162472 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1713169067539 (1.5 TiB)  TX bytes:1570631367176 (1.4 TiB)

Environment

  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6

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