BootROM> set recovery link null BootROM> save
Encountering an error during the recovery or upgrade process of a Huawei S7721U switch indicates that the system has detected an integrity issue with the firmware file being loaded. This is a critical safeguard designed to prevent the device from running corrupted or malicious software, which could render the switch inoperable ("bricked"). huawei s7721u recovery image verify failed link
Let’s parse the exact error string: huawei s7721u recovery image verify failed link set recovery link null BootROM>
If the device cannot boot normally, use the built-in to download official firmware directly from Huawei's servers: Connect the device to a charger. huawei s7721u recovery image verify failed link