2.2.16-3 with: 00:10.0 Ethernet controller: 3Com Corporation 3c905B 100BaseTX [Cyclone] (rev 30) I saw these in kernel log: eth0: Too much work in interrupt, status e481. eth0: Too much work in interrupt, status e081. After these, the interface is still up but nothing goes through it, ie. it looks like a black hole. ifdown eth0 ; ifup eth0 fixes that. max_interrupt_work can probably be tuned, but that's not the real problem. The interface should wake up back after having too much work when there is no longer so much work.
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