Random network dropouts on Lenovo T410 and X201

I was getting random network dropouts on X201 and T410 Lenovo laptops. Throughout the day users would report  that the NIC simply dropped. Rebooting fixes the issue in most cases.

Turns out both these models use the same hardware "Intel 82577LM" so something is up.

I compared settings to various other network cards and found the only real difference was that the 'receive buffers' were set to '80'.

Setting the 'Receive Buffers' to '256' seems to fix the dropout issue. 

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