請問Intel NIC的TCP offload怎麼開啟?

OS:Win7 x64 設定檢查過,應該沒有錯吧,開不了就是開不了

Intel(R) PRO/1000 PT Server Adapter
Intel(R) Ethernet Connection (2) I219-V
請問Intel NIC的TCP offload怎麼開啟?

這裡有相關資料,Intel NIC要開啟TCP Chimney,必需搭配Intel Server主機板BISO有支援I/OAT功能選項,才能正確開啟
https://communities.intel.com/thread/28723
http://www.ithome.com.tw/node/42386

如果沒有Intel CPU,Intel ServerMB,Intel NIC三劍合併配置下,連最基本的ipv4 transmit checksum,tcp transmit checksum都無法支援??那我還買Intel ServerNIC幹嘛??

2017-06-18 7:16 #1

文章關鍵字

Intel NIC TCP offload

1tac

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1tac

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twbaibai wrote:
如果沒有Intel CPU,Intel ServerMB,Intel NIC三劍合併配置下,連最基本的ipv4 transmit checksum,tcp transmit checksum都無法支援??那我還買Intel ServerNIC幹嘛??

似乎有點誤解, 第一張圖說的是檢查值卸載(checksum offload), 最後一張圖說的是連線卸載(connection offload)
connection offload (chimney)的確要綁Intel平台, 但checksum offload/large_txrx offload只要網卡driver支援即可

I've seen many references on the internet pointing to things around TCP task offloading, such as Checksum offloading and Large Send offload being related to TCP chimney. Its important to note, these are not related to the TCP Chinmey/offload described above. Checksum offload is where we allow the NIC to set the checksum on a packet when it leaves the machine (which is why Netmon and Wireshark often show "incorrect checksum" on packets as the driver which captures them sits above the NIC where the checksum is set). Large Send offload (LSO) allows the Application layer to dump down a packet which would be too big for transmission and allows the NIC to chop it up into transmittable sizes (which is why you can see packets > 1460 bytes of payload in Netmon/Wireshark).
來源

twbaibai

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twbaibai

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1tac wrote:
似乎有點誤解, 第...(恕刪)

感謝專家回覆,請問checksum offload,只要網卡內容設定打開,跟"DisableTaskOffload"=dword:00000000登入值即可嗎?

1tac

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1tac

個人積分：1103分

文章編號：64770487

twbaibai wrote:
請問checksum offload,只要網卡內容設定打開,跟"DisableTaskOffload"=dword:00000000登入值即可嗎?

是的

Win7預設是沒有DisableTaskOffload這個登錄值, 一切以網卡的offload設定為主

DisableTaskOffload=1會直接把所有的offload關掉, 不管網卡有無設定offload

請問Intel NIC的TCP offload怎麼開啟?

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