6010L does not release and renew the DHCP lease when the device is rebooted.
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With firmware 1.01.18 Network setup page does not save settings, only "502 error: Submit data failed" mesasge is showed.
UPDATE:
Downgrading firmware did not succeed with Firefox, but with Internet Explorer it worked. When dowgraded to 1.01.17 the network settings can now be saved.