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Hello everyone ,

I have a server running windows server 2008 R2. It also serves as a DHCP server. Right now the scope that’s set is from 192.168.0.10 to 192.168.0.60 for all the computers here. The office has 2 floors. I want to assign a specific scope of ip address to the first floor only and also assign another specifc scope of ip address to the second floor

For example :

1st floor : 192.168.0.10 - 192.168.0.50

2nd floor : 192.168.0.60 - 192.168.0. 150

Reason: I have a RV042 and i want to limit the bandwitch control since it asks for a scope of ip address , so my plan is to separate both floors.

Question:

1.) Assign a different scope for both floors.

2.)If i assign a scope does the IP address assigned to a specific computer permanently gets assigned and does not change even if i restart the computer?

Thank you!

7 Spice ups
2

  1. Create two scopes is fine. But static is the only way you can assign certain IPs to certain computers unless you use VLANs.

  2. The IP will not stay permanent. It can keep the same IP for a while but it can easily change after a certain time. But you can change the settings, see here:

http://www.trainsignal.com/blog/configure-dhcp-on-windows-server-2008

5 Spice ups
3

+1 to VLANs.

If you have the option to implement them, you could set up 192.168.1.X for the first floor and 192.168.2.X for the second.

2 Spice ups
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Do remeber, if you take the VLAN route, you will need to create a DHCP helper/relay on each VLAN to send DHCP requests onto your DHCP server.

I do it this way for 3 buildings, 1 VLAN for each building, with an subnet for each VLAN from 1 DHCP server

5 Spice ups
5

Hey L.S.

Thanks for replying . What if i set the duration time of the DHCP clients to Unlimited?

Thanks!

6

Hello there!,

Thanks for replying. If i use VLANs , i know they will be considered as a separate network but would they still be able to talk ? Like on the same domain or share a fold from 192.168.1.X to 192.168.2.X?

Thanks!

1 Spice up
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Hi gef,

Thanks for replying. Thanks for the tip. Like what i asked to gareth will they still be able to talk to each other since its a different lan scope?

Thanks!

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Yes, they will be able to talk via routing that needs to be set up between the VLANs. This will also reduce broadcast traffic.

1 Spice up
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That is fine but you will need to remember this setting and keep any eye on DHCP because the addresses won’t be available again if the PC is removed. In other words DHCP won’t update to release IPs.

In reply to:

Hey L.S.

Thanks for replying . What if i set the duration time of the DHCP clients to Unlimited?

Thanks!

1 Spice up
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If you have a decent switch, you should be able to setup a VLAN interface… So that the switch has an IP address on each VLAN/subnet. You can then use the switch IP on your local subnet as the default gw. It will then route data between the VLANS

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OH i see. So i have to enable routing and i will read more about VLANS then . Thanks L.S. :slight_smile:

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So what do i do in case the PC is removed from the list?

Thanks!!

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Yes i am aware of switches that can setup VLAN. What about if my gateway is my load balancer RV042? One concern though , my network kinda consists of daisy chained switces. The switch on the second floor is daisy chained to my core switch by one cable. Will VLAN still work?

Thanks!

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If you NEED to have a physical address for a computer, instead of the unlimited range, make a reservation in the DHCP settings, so that MAC address will always get that IP address. Then if you move that machine to another network, it will participate in DHCP as normal, and the old IP address would be available.

5 Spice ups
15

Most likely no. Based on your other threads, you have basic Edimax switches and they probably don’t support VLAN tagging.

Edit: And I just did a quick check on the Linksys RV042 - it doesn’t support VLANs either. You could route between the individual LAN ports, but DHCP packets aren’t routable (they won’t be passed by the router from one interface to another). You would need a DHCP server on each subnet. Anyway, the RV042 only has 10/100 switch ports, so basically your gig switches would be connected together by 10/100 ports… not optimum.

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Oh hey freestate. Oh it does not? How come i can see it on my routers home page that is has VLAN? SO are you saying if my core switch is a gigabit switch and i plug it into my RV042 it has a big difference OR the 10/100 of the RV042 is the speed of the VPN?

Thanks !

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Remember if you do this any changes to DHCP options on the server will only get passed on if you force the client machines to renew their leases.

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Musta geek. You sure are busy here on SW. Didn’t classes start already?

Well, I previously looked at three different sources on the RV042, but I believe they all referenced the original version. I bet you have a newer version – SmallNetBuilder.com has a review of the RV042 v3, which does support RIP/RIPv2, so it probably does have VLAN support. Either way, you should look through the manual to be sure. I also saw a reference to the router being in “router” mode vs. gateway mode, and that disables NAT. If this is the case, you would need a dedicated IP from PLDT/Globe/Smart/sinuman. Ingat.

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Hey richardT,

Thanks for the tip! Learned something today!

Thanks!

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Okay lng. Musta din? Yes it did already but i am a college student so my schedule is kinda flexible.

Yes i have the newest version and yes i read that also. Thanks for the help freestate!! Ingat din!