Turn off router dhcp/dns ?

[Edge Tech NY]

Random question.. Do you have to turn off those settings in your router when running a dc with those roles? Never did and don't seem to have a problem..

Sonic wall etc..

 

[seedubya]

Short answer is yes. The long answer is also yes. DHCP doesn't really matter except that you must only have one. DNS is the important part - all your workstations MUST point to the DC for DNS. If you haven't had problems with this setup before then you haven't been doing it for very long.

 

[Ccomp5950]

Nothing worse then having a large network suddenly stop working the next morning because someone decided to plug in a rogue router into the lan on the lan side of the router.

Playing "Hunt the rogue router" is a favorite past time for our old college network admin (who knew nothing of VLANs).

 

[Edge Tech NY]

Ya still learning.. Thanks

 

[YeOldeStonecat]

Absolutely...your SERVER should..."serve"..the network. Let it do its job.

If you're running active directory..your clients workstations MUST use your servers LAN IP for their DNS server, nothing else.

Yes many routers have DHCP options which allow you to modify so you can have your router hand out your servers IP for DNS...but...

...it's much better to have your servers DHCP service hand out leases, it keeps active directory tighter, clients register to the server so DNS is better updated. It is a very low utilization service....it's not like you're going to lighten to the load on your server by running DHCP on the router.

 

[drpcfix]

Yeah, you can go either way with a workgroup, but active directory relies on dns..

 

[selva]

If there is already a router or a router/IAD acting as a DHCP server on your network then you will want to disable DHCP from the second router, in this case the wireless router. This is an important step because double NAT can cause unwanted issues on your network and can become especially troublesome for VoIP networks. Even if at first you receive dial tone and are able to make good quality two-way audio calls if you do not disable NAT on all other routers, except the primary NAT router, then issues will eventually happen. The first step in configuring the Linksys router would be to connect an Ethernet cable directly from a computer to one of the four numbered Ethernet ports in the Linksys wireless router. Then power up the wireless router and then power up the computer. After the computer has opened to it�s desktop, double click on Internet Explorer and let it completely open. It may display �Page cannot be Displayed�, but that is all right.

Regards,
Selva.

 

[YeOldeStonecat]

Dude...did you even read the original post? Nothing to do with 2x routers..or double NAT. He's talking about DNS...and domain controllers.

And just the thought of a 4 port Linksys router in a business network....yikes!

 

[angry_geek]

Selva, I don't believe we've seen your intro. Are you a ghost?

 

[seedubya]

Selva, I don't believe we've seen your intro. Are you a ghost?

Spammer.............

 

[techguysolutions]

I have seen this issue many times with small businesses that try to setup a router themselves. If they call me for network/internet issues the first thing I always check multiple DHCP hosts. You might get away with it for a short time but it will quickly catch up with you and you will see very odd things happening.