I was looking into using bridge mode myself a couple of months back.
Seems it's recommended that the same model of router is used as the standards aren't set in stone and issues can arise.
Nope should not make a single bit of difference as you are using standard Ethernet interfaces between devices and all routers should meet the standards for Ethernet connectivity and protocols.
plug a keyboard, monitor and mouse into the server and do it manually.
yes you need to do this to reconfigure the server to have an appropriate IP address. Or direct connect a PC to the server via an ethernet cable (no router in between) and set the PC LAN interface to a static IP in the right range. EG 192.168.0.100 connect to the server via the server IP and configure it's LAN interface to the right range, log out, set the PC back to DHCP and hook everything up to the Netgear and test.
I have also noticed that my Internet drops out every now and then and i have restart the Modem to get it back again.
You have to restart the Cisco DPQ3925? Did it do this before bridging?
If so then you have either a faulty cable modem or a faulty connection.Go to the full post