DHCP Assigning Bad Address / Getting Unidentified Network
Jun 25, 2011
I just got a brand new laptop and I can't get it to connect to LAN.It's plugged in to the same hub as my main machine and I can't even access my router UI.It's not the cable because I tried plugging in my main machine's cable to the new laptop and the same thing happens.ipconfig reveals an Autoconfiguration IPv4 Address of: 169.254.197.187 But that number should say 192.168.1.1xx I've tried uninstalling and reinstalling the Ethernet driver as well.I've tried resetting the router and modem.I've tried resetting TCP/IP.
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Jul 1, 2012
I am using Windows 2011 SBS and Windows 7 clients.My server has a DHCP range of 192.x.x.150 to 192.x.x.199 and all other I.P. addresses are static. On a workstation located at I.P. 192.x.x.13 I am seeing an address conflict.When I perform an "nbtstat -a 192.x.x.13" command from the server I am given the logical computer name of a staff members personal laptop.Investigation of the laptop reveals that it is set to DHCP, and clearly the address of 192.x.x.13 is outside of my servers DHCP scope, so this I.P.should never be assigned, let alone in duplicate.I Google this topic before posting, and it was suggested that IPv6 could be having an adverse affect. I determined this because I performed a ping on the laptop and only got a MAC address back rather than an I.P. address.However after unticking IPv6, and rebooting, the laptop is still causing havoc.I can set a static I.P. address on the laptop, however this is not ideal.
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May 20, 2012
The problem is WAP 610n not assigning IP address through DHCP; i have to add IP address mannualy.
just go through the details below:
In my network environment we are using :
CISCO Router 800 series; IP: 192.168.1.1
Domain server with DHCP server : 192.168.1.2
DHCP pool: 192.168.1.234 - 192.168.1.250
WAP IP : 192.168.1.236
WAP configuration :
configuration view : mannual
Wireless band : 2.4 Ghz
Network mode : mixed
channel width: 20 Mhz only
standard channel : auto
SSID broadcast : Disabled [ for security reason]
Security mode : WPA2 Personal
Encryption : TKIP/AES
Firmware : 1.0.01 build 94, Oct 26, 2009
Note: In status menu it is not showing any default gateway.
Encapsulation method in CISCO router : PPPoA [ as instructed by ISP]
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Nov 20, 2011
The DHCP/DNS server is on ip address 10.1.100.103 with an alt on .102 I'm attempting to integrate a 4510R+E into an existing network and use existing DHCP/DNS windows 2008 server to push out IP addresses to connected computers.
I want to assign a VLAN to every port for management purposes and then I put an IP helper address on every VLAN.
I've attached a the 4500E partial config. I'm attempting to get Gi1/44 to a state where I can plug a computer into it an resolve an ip address and gain internet access like all the devices on the existing network can do.
I've created a new scope in DHCP with the ip subnet of 10.60.211.0 255.255.255.0 It leases addresses from .1 to .253
The computer will not resolve ip addresses with this config.
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Mar 13, 2013
I just moved to Auckland, NZ from the USA to go to school at the university here, and am having a problem connecting to the internet in the university residence hall in which I am living.Wifi is not available in the residence halls, so we need to use an Ethernet cable. When I plug in my computer, the network adapter icon says Identifying for a while then settles on Unidentified Network with no internet access, the IP is 169.x.x.x.When I try to release and renew the IP, it says unable to contact your DHCP server, request has timed out".I've tried multiple Ethernet cables, both brand new.I tried connecting to a port in a friend's room in the same building, and even in a classroom on campus, and both had the same result.Naturally after all that I assumed my NIC somehow died overnight while I traveled here, so I went to a computer repair shop expecting to have some hardware replaced, but we plugged it in there and it worked immediately so they weren't sure what to tell me.
I've gone through pages of old threads at this forum and others like it, trying solutions but having no luck.I've power cycled my computer, obviously I can't power cycle the whole network as it's for 200 people, but the IT people here have tried resetting it for me on their end as best they can. [code]
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Dec 16, 2010
I am replacing an older AP with a new 1252 unit. I attached everything and powered it up, but my DHCP server does not appear to be finding it and assigning an IP address. The status light stays green and the ethernet light blinks randomly green. Seems to be connected fine, but without an IP I cannot configure it to use it.
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Jan 31, 2011
DHCP is assigning multiple leases per machine. The server itself grabs about 10 IPs with Unique ID "RAS"
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May 26, 2012
I am trying to give an static ip address to a time clock on my network and for some reason when I connect time clock to network it will always get an ip address from a different network. for example my computer IP address is 192.168.2.70 when connected to network, my default gateway is 192.168.2.1, the IP address that the time clock always gets is 192.168.1.120, there is no way to tell the time clock what IP address I wanted to be it has to get it from router (that is what the manufacturer told me), router (16portLiksys) does not have DHCP enabled the guy who set up network left it disabled, on his notes he says server (dell server T110) is acting as router is that true that a server can be acting as router?what do guys think is going on here?all the computers hooked up to network have static IP address.I also notice that when I connect a computer to router it will get an IP address from different network the same as time clock.I tried to reserve ip address on router by entering MAC address from time clock but it won't work. I am not very familiar with the server settings I have not try changing settings on server, I am not even sure the guy who set up network is right about using server as router.
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Jun 19, 2012
This is IOS 15.1(4)M3 on a 1921 router. The LAN is 192.168.42.1/24. (DHCP config is further down.) We have a small range that we want to assign via DHCP to devices; .200 through .220 . At the same time, we have a handful of Macintosh systems to which we want to assign a specific address that is not in that 200-220 range. I don't want to configure the assignment based on the Ethernet MAC addresses because these systems might connect via UTP or wireless; that is to say, they have more than one MAC address. They only ever connect using one interface/MAC address at a time, but it's their choice; in some areas wi-fi is available, and in some areas they have to cable-up.
The Mac OSX network settings has a field for "DHCP Client ID". It would be much easier to tell the users of these systems to put their Mac's name in the Client ID field for both their wired and wireless DHCP configs. (As opposed to having them all lookup, and then give me their Ethernet MAC addresses for both of their interfaces.) I tried this with my Mac's (named "shrike") wi-fi interface, but I don't get the 192.168.42.14 address that I expected. I get an address from the .200 to .220 range.
Here's the DHCP-related config from the router:
router#sh run | s dhcp
ip dhcp excluded-address 192.168.42.1 192.168.42.199
ip dhcp excluded-address 192.168.42.221 192.168.42.254
ip dhcp pool OurOffice
network 192.168.42.0 255.255.255.0
[code]....
Is "client-name" the wrong place to configure the DHCP Client ID?
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Jan 7, 2013
HP wifi printers (I've had 2 over the last several years)eventually have a disconnect with my wifi router and was told (by an experienced IT guy from my last job) I should assign the printer a static address to eliminate the problem. How can I assign a static address to my printer. Here are the models Router: Belkin model F5D9231-4v1(01); Printer HP Officejet 6600. I know how to access the printer and manually enter an IP address and subnet and such, I just don't know which numbers to use where. I also know how to access my router, via typing in the IP address in Internet Explorer, but i'm unsure of which tab within the router's page (i.e. is it category wirelessunder MAC address control) or which numbers (IP address or MAC Address)and where should I get the correct numbers from (i.e. go run, cmd,IPconfig/all).
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Oct 12, 2011
We once had a virtual server with two network adapters, one was internal and the other was external, and people could access it directly from the internet.
That server recently, died (someone put the .VHD file on a massive RAID 0 array, and that went boom), and I need to set it back up again. All the DNS entries appear to still be there, but how to assign the external IP to the network adapter. I tried Google, but my Google-fu must be weak today as I can't find anything useful.
It's a Server 2008 R2 machine running inside Hyper-V. Nothing's changed except for the new Windows install, it's running with the exact same VM settings, which I didn't touch except to add a new VHD.
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Jul 25, 2012
My company wants to create a VPN Tunnel to allow a remote office to connect to ours. I purchased 2 ASA 5505 and I was expecting to be able to set this up without any issues. Sadly, that is not the case.
What I'm having trouble with is configuring my Public IP Address to the device. I go through the setup wizard and enter the IP Address like normal, but I have no option to input my ISP's subnet, Gateway or DNS. Without those, I get no internet connection. I know there is a way to do this, but I'm stumped.
My Specs:
2 ASA 5505 series
ISP Modem (Which they control) - SMC SMCD3GN with DHCP disabled
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Oct 25, 2012
hrome threw me a DNS lookup failed. I go into my network settings and I noticed that I had limited connectivity. It would switch between no network access and no internet access every few seconds. After a bit of fiddling around, I got it to connect through assigning myself a static IP. This isn't exactly convenient because I use this computer on multiple networks. When I try to have it on automatic IP, I get no IP address or default gateway when I do an ipconfig /all. It would appear that my router quit assigning my laptop an IP for no reason whatsoever. DHCP is enabled on the router, and all other devices work fine. What could possibly be the problem here? I'm 99% sure it's not an IP conflict either. It's not being MAC filtered because I'm on the thing right now posting this through a static IP. It's not my A/V because it's worked great in the past. Perhaps I should also mention it occasionally says "unidentified network" instead of the SSID
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Jan 22, 2012
I'm fairly new to Cisco configuration and I am looking at a problem for a client that involves the use of a Cisco 887 (wired only) as the main router/gateway. The problem I am investigating involves the allocatoni of DHCP addresses from the device to a product we have designed that connects to the router. I am attempting to set the 880 up on the bench with no ADSL connection and just use the DHCP feature of the box for the 4 switch ports on the back. I have tried all kinds of configurations from default. Whatever I do I can't get the router to assign an IP address to anything that is plugged in (Windows or Linux machines). What could I be doing wrong ? It can't be that difficult to get the system to just act as a DHCP server.
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Feb 16, 2013
some problems when I was trying to install my X3000 as a DSL modem and router.I had to assign a designated IP address but I have dynamic IP from my internet supplier. I can't get pass the stepp of assigning IP address.
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Apr 3, 2011
Is there anyway you can assign a static IP address within WAG160Nv2 to peripherals such as an XBOX?
The knowledge base only seems to show how to assign an IP address in the XBOX but when I have to reboot the router, I've noticed the XBOX is assigned a new IP address when viewed in the router pages.
If I set a permanent IP address in the XBOX, this will no longer match what is in the router.
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Apr 9, 2012
Recently purchased 5 SGE2010P 48-port switches to replace older L2 switches. I have 4 switches in single stack and one as a standalone. Both the stack and standalone will connect to at least 1 Dell 2724 switch. Both the stack and the standalone Cisco are in Layer 3 mode.
I have created several VLans on the Cisco switches, and am trying to assign an IP address to the VLan, but cannot seem to figure out the web gui. Each time I try to use Systems > System Management > IP Addressing > IP Interface, then click Add, it simply changes the existing IP of the management interface. So, I'm not sure how to go about assigning an IP Address to an Vlan.
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May 17, 2011
My local DHCP server mis-assigns IP Addresses of 192.168.x.x to laptops every morning.It has been suggested that one of my print servers (two Fierys and a Creo) is pushing 192.168.x.x onto the network but I think I've ruled that out. have an XP Pro desktop running a standard Windows bridge that connects a wireless Netgear router to the local Cisco switch. This has worked flawlessly for a couple of years so I hesitate to blame the bridge.My remote IT dept pushed a change/update to all locations having to do with address lease duration. I do not know details.Is there a way I can identify the source of the problem if I do not have admin access to the DHCP server? The only local control I have is to cycle power.
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Nov 7, 2012
I am doing Activity 6-1: Basic VLSM Calculation and Addressing Design (6.4.1) in the ccna book.the lab can be seen here: (mellowd - link removed) I've done the topology and assigned the addresses appropriately as shown in the first table. My question is on Task 2 Step 2."Assign the first available subnet to HQ LAN1."
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Sep 3, 2012
I have a win xp system which connects to internal network & Internet. The problem I have is, for each work i need to change the IP address.
Ex: For internal network the ip should be 192.168.0.1 To connect to internet the ip should be 192.168.1.1
Now I want to be connected to both internal network as well as internet at the same time. So what should I do ?
* I can not add another physical network card.
* I can not change the IP's of any other system or config servers etc... (as it is used by our internal application, doing so will make a mess.)
* I have the admin rights so any software changes to my system can be done.
So i was hoping to add a virtual network card, and configure it to the new IP. So can that be done ? if so how ?
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Oct 8, 2012
i can search for networks. As you can tell i am currently on the internet on my laptop. I can search for the current network i am on through my adapter. I then connect to it. It says im connected to a unidentified network. It will not let me search the internet or anything else.
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May 23, 2012
During this time we've had two different Internet Service Providers as well as two different modems. Also we've had 9 different devices connected to modem wirelessly. ( 2 Desktops, 3 laptops, 2 Xbox 360s, and 2 Nintendo Dss ) And this desktop is the only one that has had any issues, it's also the oldest of the devices. So I doubt the issue lies within networking but more with the actual desktop. I've even conneceted the desktop straight to the modem with an ethernet cord, also to no avail.
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Apr 25, 2011
ok i did the cmd ipconfig and it says media state disconnected.also i uninstall a network adapter it was the isatap one also it had a yellow mark one it so thats why i tryed to uninstall it i thought it would let me install it agian but it didnt so i did that add legacy hardware so now it shows it in the hidden devices tad with out that yellow mark also when i try the problem and solution found the isatap sayinf could not load driver software click on it and it says windows was able to successfully install device driver software but the driver software encountered a problem when it tried to run.the problem code is 31. the control panel tad would all was say microsoft windows came up saying window explorer has stopped working windows is checking for solution to the problem windows explorer the internet was working then and it still was i think it had that internet ball on it but when i try to use the internet it wouldnt connect
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Apr 26, 2011
my customer has FreeRadius, and I'm trying to get the server to assign a network admin role to a 5K running 5.0.3 code.This is based on the example given in this document: url...The server authenticates the user name, but will only put the user into the network operator role. This is confirmed by checking the output of show user-account and debug security user-db.The Radius test using the same credentials passes the authentication test. I'm sure the problem is that the N5K dosent understand the VSA format of the attribute, and that this is a simple syntax problem.
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May 6, 2012
am in the process of setting up an online business and now all of a sudden I have no internet access which is not good! I am connected to the router but it says unidentified network, local only...When I lost connectivity I spoke to my ISP provider and they took me through all the steps then determined that it is the router that is at fault and are sending me a new one. HOWEVER after I hung up I remembered I have an old router so I tried that one, same thing, then my neighbours gave me access to their wi-fi, same thing.... so suspecting that it is not the router I have dug out an old laptop which now connects fine to my router wirelessly.
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Dec 12, 2011
I switched on my laptop today and it wouldn't connect to the internet because of an 'unidentified network' problem. Last night before I went to bed it was surfing the net fine and then this morning, nothing. No one has touched the laptop overnight and it was switched off all night so I have no idea how this has happened. I'm using my internet connection via my iPhone with no problems. I've already tried several things to try and fix the problem - I've reinstalled all network adapters, have fiddled with IPv4 settings, have deleted and re-setup my network connection, and have restored Windows to a previous point. I can't connect my laptop to the router using a cable because I live in a bock of flats where lots of people share the same router and it's locked in a security box, so I'm just using a wireless connection.
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Nov 5, 2012
Right now I've been staying at a hotel and my internet doesn't work while my brothers laptop connects flawlessly. The only way the internet works again is by me tapping the power button and putting it to sleep and turning it back on then the internet works but only for a couple of minutes.
I've tried everything, I've installed the latest wireless driver worked a little then went back to the same problem then I rolled back the driver it worked then it went back to the same problem. I've tried everything I checked power options, I reset the winsock and Ip,I tried a vpn still no luck. If I go to network and sharing center and trouble shoot it say that the adapter is not plugged in or the DHCP is not enabled which it is. Like today I could barely get on because it just showed unidentified network with no hope of connecting. On Xirrus it shows the hotel has more one ssid with the same name.
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Feb 27, 2012
recently i bought a phone that has the ability to connect your pc to the internet. It has worked great, but when i connect my ps3 or another computer to my laptop which i use the phone with, they all come up as unidentified network. I tried changing the setting on my computer, but cant seem to figure out how to change it from unidentified to home, so i can use the internet on connected pc's and my ps3.
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Sep 15, 2012
I am in a network, where my laptop works in all other routers except my room's router, whereas other's laptop/PC supports my room's routerI'm out of the network.However, I'm now in same network, coin another router.
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Jun 23, 2012
I have my wireless router that gives internet to all my computers (4), each one having their own usb wifi adaptor. This part works fine, never had any issue with internet.Each of the computers also have its own GBE adapter but i wasn't really using them. Until now, i bought a switch and connected all 4 computers through rj-45 to the switch just so i could transfer files easier and especially much faster than through the wireless.This is where my problem is, the network works, i can see and transfer files just fine, the issue being, on each and every computer, the lan is considered as unidentified public network. I've tried everything i could think of, yet, nothing, i can't change the status of the lan connection.
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Aug 29, 2011
my gateway laptop, running vista 64 home premium, cannot connect to the internet at home. connects straight to the modem via ethernet. displays as 'unidentified network'. according to the Atlantic BB tech(my ISP), my laptop is not obiaining an IP addy from the modem. The modem seems good, and the tech could see the modem from his end, but no IP addy from the laptop. ran ipconfig /all from home and the gateway was 207.255.36.1(preferred) instead of 192.168.x.x So i'm stumped with no net at home. the ipv4 properties do have the obtain automatically button checked, and dhcp is enabled. had the tech reset the provisioning on the modem & he said the mac addresses were cleared already. i reset the ipv4, ipv6, and winsock. haven't gotten anywhere. tech's last advice was to bring the modem back and swap it for another one.
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Nov 23, 2012
Namely an Unidentified Network with no NETWORK access. Some information first, the NIC that Im using is the Realtek PCIe Family Controller, Ive updated the drivers, Ive uninstalled, Ive reinstalled. Ive basically been on the internet for the past two days trying all the solutions. Including refreshing and renewing my ip, trying a static ip (although, Im still not sure if I did this step correctly) Ive tried disabling IPV6, Ive tried adjusting my speedflux. The problem is also intermittent with seemingly no reason whatsoever, some days Ill go without internet for the entire day, then the next day Ill boot up my computer and Ill have internet again. It should be noted that when I enable WIRELESS on my laptop, Im able to connect to the network, but when I enable wired, I am not able to.
Here is the ipconfig /all for when Im connected wirelessly and have a connection.
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:Windowssystem32>ipconfig /all
[Code]....
It should be noted that I am using powerline adapters for my connection, but as I said, this problem only recently started cropping up. I went fine for almost a week with no problems, then all of a sudden it started happening. Im still able to connect wirelessly so its not too much of an issue, but I prefer via Ethernet..
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Aug 6, 2011
My pc is windows 7ultimate and my laptop is vista ultimate. the router is connecting fine to the pc. as i try to connect to the laptop it keeps saying unidentified network and local access only. i tired different things but nothing seems to work. it will work only when there is no password on the wireless.
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