![]() ![]() If the computed checksum fails, the packet is discarded.įor more information, see Hardware Only (HO) features and technologies. If the NIC asserts that the checksums are invalid or not checked, the IP/TCP/UDP stack internally calculates the checksums again. If the NIC asserts that the checksums are valid, the system accepts the packet unchallenged. Click Activate Product On the next screen, enter your Email Address. Enter the email address associated with Office for Mac and click Next. Note: If you weren't prompted to sign in, open a blank file and go to File > New from template > Sign in. On the Sign in to activate Office screen, select Sign in. Click on the File tab in the upper left corner of your screen. Open any Office app, like Microsoft Word and in the What's New box that opens, select Get Started. From any Office application (such as Outlook): Windows. On the receive path, the checksum offload calculates the checksums in the IP, TCP, and UDP headers and indicates to the operating system whether the checksums passed, failed, or weren't checked. Note: Before you begin activating, if you haven't already, you'll need to redeem and install Office on your PC or Mac. Select IPv4 Checksum Offload, and then select Disable.Īddress checksum offloads are a NIC feature that offloads the calculation of address checksums (IP, TCP, UDP) to the NIC hardware for both send (Tx) and receive (Rx).Right-click the network adapter, select Properties > Configure, and then select the Advanced tab.In Windows Control Panel, open the View network connections item.Here's how to disable the IPv4 Checksum Offload feature: Work with the network device manufacturer and Microsoft Windows support to find a permanent solution. This step may resolve the issue only temporarily.
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