Draytek 2800 router failed (no internet access) and during testing by Draytek tech support I was advised to backup the config and then upgrade the firmware. Having done that, the router still would not connect to the internet and so I have had to replace it with a new Draytek 2820n. I can now connect to the internet when the new router is connected, for testing and setup, to my laptop.The router's default gateway is 192.168.1.1. I then tried restoring the config to the old router so that I could find out what the original LAN settings were. This failed and after lengthy emailing with Draytek it was obvious that the backup file is corrupted so the settings are not retrievable.
The LAN is based on a sophisticated 3COM switch/hub and the pc's have ip addresses commencing 192.168.0.n with a default gateway of 192.168.0.254. The pc's all receive their ip's automatically from the switch (I assume). When I connected the new router to the LAN I could not connect to the internet from any of the networked pc's. I assume that is because the Draytek has a different ip. I do not want to mess around with the LAN ip's but would greatly appreciate advice on changing the Draytek 2820's settings so that it will allow all pc's on the LAN to connect to the internet and still with each other.