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Ignore DHCP and use alternative DHCP ?

Hi Experts,

Since recently i've been having problems that my mobile devices are not getting an ip address from the telenet router dhcp . The only way to fix it it to restart the router which acts as DHCP

My ISP at my house (Telenet in Belgium) has its own modem+router+phone+tv (all-in-one box) ...
Router functions are only accesible throu my ISP's website.
DHCP can not be turned off.

I would want to use a different DHCP on a new router  and then off-course use much better other functions the new router provides (firewall, DHCP-reservatios, guest login, ...)

So since i can not turn off the DHCP, can i ignore it somehow?

I prefer not to create a different VLAN with a second subnet. Because my TV decoder which allows me to view movies on demand needs to be connected to the all-in-one box. it is connected with coax and utp and it need both to come from that box.

All help is welcome.

1 Solution
I am not aware of a way to ignore DHCP servers since the initial request is a broadcast.  You could just statically assign all the IP's on your network and it should still work and you wouldn't need the DHCP service any longer so effectively you would be ignoring it.

If you can't statically assign the IP addresses then you could try your luck with another DHCP service on the same network.  THe clients will go with whichever one responds faster.  If your alternate DHCP service responds quicker then you could be okay.  Plus if your clients end up using both and the ISP router DHCP service fails your other local one should still work and then you wouldn't need to restart your router (assuming DHCP is the ONLY reason for the router restart).
If you are setting up two DHCP servers, I would think that you'd want them to have different address ranges (same subnet) so that they won't accidentally assign the same address to two clients.

Depending on what devices need to access each other, you may be able to attach the WAN/Internet side of a new router to the LAN side of your existing router and then have all devices on the LAN side of the new router (different subnet than the LAN side of the old router).

If your TV decoder can work through the new router, then you might be able to have ALL devices on the new router, which would be a very reasonable configuration.  The most complicated part of it comes if you have to do any port forwarding as you would have to do it in both routers (or just forward ALL ports from the old router to the new one).
Lee W, MVPTechnology and Business Process AdvisorCommented:
I would probably use only one port on the ISP provided router.  Then put in another router connecting that router's WAN port to the LAN port on the ISP provided router (you'll be double-NATing your connection).  Then use the wireless and wired connections on the new router (make sure you use a different IP range on the new router - for example 192.168.42.x)  Then the ISP router is responsible for ONE connection - that new router - and even then, it's not responsible if you can get by using a static WAN port address.
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