疑似 I 社 Z400 晶片組 2.5Gbe NIC 設計缺陷?!
來自 Reddit 網友的分享https://www.reddit.com/
一張簡報間接透漏了似乎新世代平台的 2.5Gbe PHY
在進行大量資料傳輸的過程中,導致封包損失掉速的狀況
而解決對策預計要在下一個步進,或者是新的RL處理器才能完善
https://i.imgur.com/FXCh3lx.jpg
大家好,稍微詢問後獲得了一些資料可跟大家分享。
Intel 已針對簡報上提到的問題給予修正方法,「I225 v1 Minimum Supported Receive Inter-Packet Gap (IPG) is 8 bytes instead of 5 bytes」,簡單來說就是 I225 v1 最低支援 Inter-Packet Gap (IPG) 是 8 bytes,但部分路由器、Switch 是走 5 bytes 的 IPG 導致這問題。
而針對 I225 v1 的 Workaround 方法,則是透過驅動方式當遇到 IPG 問題時,自動調成 1Gbps 避免這狀況發生。
「Workaround:The impact of this IPG issue can be mitigated when connected through a switch/router by setting the link speed in the driver (Windows or Linux) to 1Gpbs operation to enable a 1Gpbs line rate.
Also, the latest Windows drivers and I225 firmware available for download (driver version 1.0.0.30 or later NVM version 1.38 or later) can detect when the IPG packet drops occur and will automatically reset the link speed to 1Gpbs. Please see downloads here: https://downloadcenter.intel.com/product/184686/intel-ethernet-controller-i225-series」。
而目前已知相容的 2.5Gpbs 伙伴如下圖表中所示,且這問題會在 I225 v2 解決並在生產中。這份文件可至這邊下載:
檔名:621661-intel-ethernet-controller-i225-public-external-specification-update-v1-0.pdf
https://cdrdv2.intel.com/v1/dl/getContent/621661
至於 RKL 的時間點,就大家自己心算吧!簡報上的資訊無法證明對或錯,參考即可。
lin.sinchen 發表於 2020-4-28 19:41
大家好,稍微詢問後獲得了一些資料可跟大家分享。
Intel 已針對簡報上提到的問題給予修正方法,「I225 v1...
隨後 Intel 美國提供了簡短的聲明,提供給大家參考,白話文跟上面那則回覆相似。
「We identified an IEEE spec variance in the Intel Ethernet Controller I225 that results in performance degradation when paired with some 2.5GbE switches and routers.
Intel is committed to delivering the highest levels of product quality and has already corrected the issue in the latest production version of the silicon.
Consumers experiencing this issue should ensure they have the latest software driver and associated firmware installed and can refer to https://www.intel.com/i225v1 for compatible switches and routers to ensure 2.5Gb/s connectivity.」
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