Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Limiting wireless clients using 'Start IP Address'

05 Dec 2017   #1

Win7 x64 & XP
Limiting wireless clients using 'Start IP Address'

I hope I can explain this correctly, sorry if I don't. Some 'assumption' on my part is included.

I assign static IP addresses to the clients, always have done so. Two Desktops, One Laptop, two DVR's one ATA (VoIP adapter) and now one 'Streaming box. All wired except a Laptop.

Not a problem until I assigned one to this Streaming box (Fire TV 2).

Looking at the attachments, specific the 2nd one, I assigned '31' (last segment/octet in the address) to the FTV. It showed correctly in that screen.
When I looked at the LAN page in the Router, it the last IP segment/octet was '54' which is in the allowable 'limit range' I specified, not the static '31' I assigned in the device.

Today, I now see it is showing correctly as '31' with what appears to be the former Router assignment (if that is the correct term) as '54' at the bottom of the page which I assume is a 'history' list.

Can this behavior be due to "lease time"?

When I initially connected the device to the Router, it was in auto assigned address mode. Can I assume the 'clock' started running at that point before I set a static address??

I hope that made sense.

Attached Thumbnails
Limiting wireless clients using 'Start IP Address'-limit-number-clients.png   Limiting wireless clients using 'Start IP Address'-limit-number-clients-lan-page.png  
My System SpecsSystem Spec
05 Dec 2017   #2

Win7 x64 & XP

I just wanted to know if my assumptions etc. were correct or did I miss a few?
My System SpecsSystem Spec
05 Dec 2017   #3

win 8 32 bit

If it had an IP on lease it would retain that for the duration of the lease and then get the correct one when it re applys
My System SpecsSystem Spec

05 Dec 2017   #4

Win7 x64 & XP

What got me was this one specific device showed the assigned static IP in it's user menu correctly, but it wasn't in effect at the time. I would think when I entered it, it would either error out, or give a some type of message.

It's all good now, I'm just trying to understand why it happened. I prefer the idea of specific, always used devices always showing the same address.
My System SpecsSystem Spec
09 Dec 2017   #5

Windows 7 Ultimate x64

It seems quite normal to me, for the sequence of events you describe. The simple explanation is that the computer is using the "31" address, but while it initialy was on DHCP it got the "51" assigned, and at the time you took the screenshots that assignment was still valid. I don't see any problem with that.

The key point is to understand what means each table. My understanding according to both screenshots is this:
The first one is labeled "active clients". It means it refers to the devices using the router right now. You can see the MAC and IP addresses of each one (it doesn't informs or cares about how each one got those for now). Basically it shows the answer to "who is plugged to me right now?".
The second table says "DHCP clients", that refers to what devices have requested an automatically assigned IP address from the router and what responses the router gave. The fundamental information this table gives is "this MAC address requested an IP, and I gave this one", nothing more. It doesn't says what the device actually did with that IP address or even if the device is still alive. Only the MAC=>IP mappings the router itself created.

Note that you can see both tables because the router has both functions, as a router itself and as a DHCP server. Should you use an external server, only the first table would exist, and the other would be in a separate computer. Each table refers to a completely separate service.

So, my understanding of how you reached to that situation is that the following events happened:
1) The device is not yet connected. Neither table displays it.
2) The device is connected using its default configuration, that is, DHCP. So it issues a request for an IP address and connects to the network using that. At this point, it appears in both tables, with the "54" that the router gave to it. The lease time began counting. This is the case of the "Galaxy J7" shown there, using DHCP.
3) It was reconfigured to use a fixed IP ("31"). It disconnected from the network and reconnected, using the new IP address. This is what you see in the first table you posted. But, the previous DHCP request was still in effect, the router keep it reserved (until the lease time expires), even if it's no longer used, so it remains with the previous IP, and this is the second table you captured.
4) At some point in the future from your screenshot, the lease time expires, then the DHCP table deletes the "54" row from it, making it available to anyone else. At this point, the device only appears in the first table. This is also the case with all others devices shown, likely having fixed IPs.
My System SpecsSystem Spec

 Limiting wireless clients using 'Start IP Address'

Thread Tools

Similar help and support threads
Thread Forum
Home Folder Mapping Failing on Wireless Clients
Trying to solve a complex and frustrating problem with home folder mappings for my school district and am stumped. Any help is appreciated. I am doing basic home folder mapping in an Active Directory domain for users on the profile tab of their user account. We are mapping H to...
Network & Sharing
How to Change Your Win 7 Wireless Adapter MAC address
There are programs to accomplish this, but here is the roll-your-own method of changing the Media Access Control (MAC) address of your wireless adapter. CHANGE YOUR WIRELESS MAC ADDRESS The possible MAC addresses in Windows 7 for wireless adapters: X2-XX-XX-XX-XX-XX...
Network & Sharing
MAC address conflict (wireless) resolved with arp -a
Hi Everyone, I had a very strange issue when setting up a DHCP reservation on my router. Whilst attempting the setup my Windows 7 computer was reporting one MAC address (both under ipconfig & through a program called Change MAC Address) and my router was reporting another (and NO there weren't...
Network & Sharing
Wireless printer cannot see IP address
Hi. I'm running windows 7 ultimtae 32bit. I would get my HP C4380 connected to my computer. I can see the MAC address for the printer in the router, but I cannot see it's IP address. What could be reason(s) for this behaviour ?
Network & Sharing
how to display a list of connected wireless clients?
OK, simple question - I have a router with four wired connections and the wireless. The wired computers are right in front of me - this is my home office we're talking about - but how do I know who's connected to my wireless? Yes, I could go into the router configuration and maybe see a log, but it...
Network & Sharing

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 17:11.
Twitter Facebook Google+