Broadcom tg3 NIC module stops responding when using jumbo frames (large MTU)

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Issue

Broadcom tg3 NIC module stops responding when using jumbo frames (large MTU).
Setting a larger MTU stops tg3 based NICs from sending or receiving traffic.
Under certain circumstances when MTU is set > 1500 the NIC drops all frames > 1500 bytes.

Environment

Red Hat Enterprise Linux 6
tg3 module
Broadcom NetXtreme NIC

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