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#1 2007-07-24 8:57 pm
- EricD
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- Registered: 2007-04-14
- Posts: 8
LAN IP Address Reservation
This is probably more a questio for Netgear, but here it goes... My setup:
Cable modem -- Netgear router -- Netgear Gb hub -- computers
The router is WGT624 v3: wireles + 4-port 100 base T
The hub is 8-port Gigabit ethernet
The router is set to assign IP addresses.
I want to give each computer a fixed address and use NETGEAR's LAN IP Setup to reserve addresses, which is supposed to give the same IP address to a computer when it's connected.
The problem is that it sometimes assigns the correct address and sometimes defaults to assigning the next address. Any suggestion?
Eric 
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#2 2007-07-27 3:09 am
Re: LAN IP Address Reservation
Unless I'm misunderstanding you, the easiest way would be to assign IPs directly to each machine. That way you are sure they never ever change unless you make the change.
You need to make sure you're using a reserved IP that is for private use -- such IPs are like 10.x.x.x, 192.168.x.x.
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#3 2007-07-27 4:12 am
- D'Eyncourt
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Re: LAN IP Address Reservation
From your description my guess is that you have your Netgear router setup as the DHCP server for your LAN. You should turn DHCP services off at that router, thus it is no longer assigning any IP addresses to any machines requesting one.
On each of the computers you have to change its setup to have a fixed IP (which you assign) and to no longer make any DHCP requests.
Any particular reason for fixing the IPs for your computers within your LAN?
BOYCOTT SONY
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#4 2007-07-27 8:11 am
- EricD
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- Registered: 2007-04-14
- Posts: 8
Re: LAN IP Address Reservation
D'Eyncourt wrote:
Any particular reason for fixing the IPs for your computers within your LAN?
The main reason is to use WakeOnLAN, which creates a new profile for each IP address. So when I want to wake up a machine on the network, I have to try 4 or 5 entries before I find the right one. Also, Printer Sharing tends to create additional printers.
adndgamer wrote:
You need to make sure you're using a reserved IP that is for private use -- such IPs are like 10.x.x.x, 192.168.x.x.
Whenever I try to assign a manual address, I loose my internet connection (I can still get e-mail through but I can't use a browser).
D'Eyncourt wrote:
You should turn DHCP services off at that router...
I would like to keep the DHCP server option when a guest needs to connect. What would happen if I turn it off?
The way Netgear describes the feature, the DHCP server should always assign the same IP address to each machine with a reservation:
Address Reservation
When you specify a reserved IP address for a PC on the LAN, that PC will always receive the same IP address each time it accesses the DHCP server. Reserved IP addresses should be assigned to servers that require permanent IP settings.
Eric
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#5 2007-07-27 9:12 am
Re: LAN IP Address Reservation
On a proper router, you'll be able to determine the DHCP address pool. Just set it so only a small block of available IP's are assigned to the DHCP pool, and give your other machines static IP's outside the pool.
Even if your have DHCP active, you can assign static IP's; just make sure you don't assign IP's that have been given out. The DHCP server should not complain when a device joins the network with a static IP, and it should mark the IP as taken so it won't try to assign it to a DHCP client joining the network.
,xtG
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#6 2007-07-27 10:43 am
- EricD
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- Registered: 2007-04-14
- Posts: 8
Re: LAN IP Address Reservation
Alien wrote:
On a proper router, you'll be able to determine the DHCP address pool. Just set it so only a small block of available IP's are assigned to the DHCP pool, and give your other machines static IP's outside the pool.
The default pool for Netgear is 192.168.1.2 to 192.168.1.254. Definitely more than what I'll ever need. Should I reduce the DHCP pool and keep the static IPs in the 192.168.1.x range? or can I assign any number?
In System Prefs > Network, should I choose "Using DHCP with manual address" or "Manually"?
TIA, Eric
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#7 2007-12-31 4:26 pm
- EricD
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- Registered: 2007-04-14
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Re: LAN IP Address Reservation
A little update to an old topic:
- The Netgear router requires the reserved addresses to be from the DHCP pool.
- I was never able to get the address reservations to work reliably. It would often default to the first available address in the pool when I start the machine and only switch to the reserved address if I open the Network CP and click "Renew DHCP Lease"
- I upgraded to a Linksys router and it works seamlessly.
Eric
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#8 2008-01-01 7:17 pm
- sturner
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Re: LAN IP Address Reservation
Another satisfied customer.
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#9 2008-01-01 8:09 pm
- dv
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Re: LAN IP Address Reservation
My Apple Airport Base Station also works well.
My dad's laser printer has been 192.168.0.38 for 7 years. Here's to forgotten passwords. 
"Now commences the process of cutting off the head, which generally takes from an hour to an hour and a half by an expert workman with a sharp blade." -Reuben Delano, Wanderings and Adventures
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#10 2008-01-15 11:40 pm
- jesstech
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- Registered: 2008-01-15
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Re: LAN IP Address Reservation
I am pretty certain this is a bug within Leopard's DHCP client. My WGT624v3 Address Reservation feature works well with PCs or Macs using Tiger, but not Leopard. As soon as I upgraded I began to notice trouble. My Leopard machine is the only one that will not respect the address reservation rules.
I know a few people who have had to downgrade to Tiger because Leopard's sub-par DHCP client will no longer connect to their University's Cisco routers.
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#11 2008-01-16 4:45 am
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