A quick comment on the new Sagemcom 5366TN Gateway.
Yes, faster WiFi access, but....
I've had to give 5 PC's and then phones and tablets Static Addresses due to the number of times I've lost Internet Access on these items.
This is fine for me as I'm able to do so but I can only think of how many people are having problems with this Gateway.
Thumbs down I'm afraid.
Cross posting my DHCP issues from here https://yescrowd.optus.com.au/t5/NBN/Sagemcom-5366-TN-and-DHCP-problems/m-p/591446#M18265 as suggested.
1. After a while of operation the DHCP server will stop giving out IP addresses to new devices. e.g. a mobile phone that was previously connected will fail to get an ip address when returning home. I've been monitoring this one at it fails during the DHCP handshake - all looks normal until the router fails to send a final 'DHCPACK' message to confirm allocation of the address.
2. DHCP settings aren't persisted after the device is rebooted, e.g. disable DHCP and reboot the router, DHCP is set to enabled again. Which is a pain when I'm trying to set up an alternative DHCP server that actually works.
I don't believe you can update the firmware yourself (without getting the update file from Optus), it should get pushed out to your router automatically. I restarted mine a couple of weeks ago and noticed it was installed.