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Re: Telus Gigabit internet extremely SLOW.
I have the same Intel I211 gigabit network adapter as you and also experienced extremely slow speeds. Apparently there is a compatibility issue between the Alcatel Lucent optical network terminals (ONT) that Telus uses and some Intel network adapters. Intel forum discussion: https://community.intel.com/t5/Ethernet-Products/Help-Intel-I219-V-TCP-Checksum-Offload-IPv6-Issue/m-p/686435 Intel workaround: https://downloadcenter.intel.com/download/27263/Disabling-TCP-IPv6-Checksum-Offload-Capability-with-Intel-1-10-GbE-Controllers The workaround involves disabling the TCP-IPv6 Checksum Offload feature. It can be applied using the provided PowerShell script or manually in Device Manager. I applied it manually and everything worked great afterwards. Hope it helps.7.6KViews1like0Comments