atcomsystems.ca/forum Forums VOIP Phones & IP PBX Networking mixed static/dynamic network

Please bear with me on this one; I am far, far from a network guy. :confused:

I have a DSL modem/router provided by Verizon a westell 6000 I think. It has a dynamic ip address. I have two desktops and my laptop. The desktops are plugged into a linksys switch I also have a linksys wireless access point connected to it, which is how I connect my laptop. I recently added a speco IP DVR with a ddns server for my CCTV setup; this is also plugged into the switch. I can reach the dvr from all my pc's without a problem and I can get online with my pc's with no trouble. So far so good.


This is where I go downhill fast

I would like to make the ip address of the DVR static so when it reboots the shortcuts on the pc's are still valid. I would also like to be able to use the ddns feature of the DVR which requires me to open some ports on the router so I can access it remotely via the web.

The pc's will still need to be able to connect to the internet; If possible I would like to keep these a dynamic address but would not mind making them static as well. So I guess what I am asking is how do I configure the router and pc's? Oh ya the PC's are all running win XP and the DVR is Proprietary software but that is the one part of this I can actually configure.



Thanks all

:shrug:

set up static Ip's on everything on the LAN ,within the address range of the router .

so for example if my routers range is:
192.168.1.50 to
192.168.1.100

DVR=192.168.1.50
PC1=192.168.1.51
PC2=192.168.1.52
PC3=192.168.1.53

do I need to make any changes on the router itself?

that would work , no need to change any router settings .

you could go into the router and set the range to 150-153 as a added security measure since you do have the wireless access point .

( I have mine set to three address , if I need a extra one I go in and add it then delete it when I'm done )

The router's range likely refers to the addresses to make available for DHCP lease. If that is the case, I'd set up any static addresses OUTSIDE that range. With a 255.255.255.0 netmask, you can use any address 192.168.1.2-254 for the static ip.

For example, I have a web server at 192.168.1.200 and a printer at 192.168.1.35, with the router handing out addresses in the .100 to .150 range.

It's probably no longer strictly necessary, but in the case of Linksys routers, it used to be that anytime the router was power-cycled, it would happily start handing out IP addresses without checking to see what addresses were already in use on the network. Other consumer-grade routers behaved similarly.

Hopefully, they've all fixed that little bug by now, but you never know...

why set static outside the range ?

if you limit DHCP to only the number needed and they are static then the router wont hand anything out becouse nothing will be asking for one

Most of the dhcp servers in these routers has an ability to relate a static address to a MAC address. Then when the DHCP client on the network requests an address, the server assigns the appropriate address every time.

well I tried to assign the static IP's within the range and the router is still hading out address. So I will try to set them outside the assigned range and see what happens

how is the router "handing out address" ?

if all devices are set with a static Ip then no device will ask for a address .

the router cant "hand out a address " to a device that already has one

Then I may not have set up the static ip address properly on my pc's. After I reboot the PC, and check my ip address, it is assigned a different address, When I go back to my network settings the info I set up is replaced and "auto detect" is selected again...very very annoying, not sure why it is doing this, I am sure I am doing something wrong, I am just not sure what. Any Ideas???