This is I think a separate problem compared with some others to with routers.
My D-Link DL-514 (a wirelss unit but no wireless connection used - all cable) served me well over quite some time with my last puter - allowing an easy hook up to my backup machine as well - both existed happily with their connections - all from a Direcway 6000 satellite modem.
I started with current machine mid this year ..... and IIRC was still managing fine with two machines off the router but - end of Sept had to upgrade 6000 to the 7000 modem model .... since when no luck using router.
I did a router reset - power down, power down modem - and then hook all up and power up. Bringing up my Broadcom Control suite - I checked out with tests and it pinged the 192.168.0.1 IP of the modem and other tests showed as good including relevant cables - but - no functional connection seen by puter. Some tests involve a temp virtual disconnection and the usual "cable unplugged" message came up briefly and then off. All seemed to check out but no connection as far as puter was concerned.
So - apart from things not seeming to set themselves and work, I went back to direct LAN link to puter from modem ... but I found that after a reboot and modem refresh power cycle - I had no connection!
Thank heaven for ERUNT as a use of ERNDT from recent - got whatever settings shouldn't have changed in reg - back to what did work. .. relief. However, I am loathe to try again as all that happens is it screws things up as well as not working! I wonder right now mainly about the MAC number and what I might be able to do to check this out. In my data sheet for this 7000 modem it mentions a MAC number different from what I see in the Broadcom Control Suite ..... should these match.?
Routers and networking have to be my weakest points - any thoughts appreciated regarding setting up a router - what matters and what doesn't.
