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offload for VLAN frames are also supported. The VLAN hardware assistance is available only on 82550/82551 based controllers. While I'm here change the confusing name of bit1 in byte 22 of configuration block to vlan_drop_en. The bit controls whether hardware strips VLAN tagged frame or not. Special thanks to wpaul who sent valuable VLAN related information to me. Tested on: i386, sparc64