DHCP problem

Similar Questions

• Satellite C870-1J6 wired LAN DHCP problems

  Hi all

  Here, I have a new laptop C870-1J6, which makes my life miserable. It won't start not reliable PXE, and the network card also does not start in Windows.

  On a cold start the PXE boot Gets an address dhcp fine most of the time, but a warm reboot fails most of the time.
  In windows this NIC also does not start. After five to ten minutes, he finally gets an address from the DHCP server. Rest of the network works fine.

  No points for guessing the manufacturer of the network card, of course, there a realtek :-(
  "RTL8102E/RTL8101E PCI Express Fast Ethernet controller.
  PCI ven: 10EC, dev: 8136

  None of the solutions, or can send Toshiba somehow? because I don't think I can do a lot on the PXE problem myself.

  At first, I have to say that I m really wondering why you have problems of LAN under Windows.
  Have you noticed these LAN issues from the first day of use?
  Are you using the original pre-installed OS that you got with your laptop or a facility clean or even company?

  Maybe stupid question, but I assume that LAN is set as first boot device, right?

• Trek PR2000 DHCP problems, maintains a drop connections, perhaps workaround

  Hello!

  A few days ago, I bought the new Netgear Trek PR2000 mobile wireless router. Goal was to have a point of contact for all my devices while traveling and be able to connect to a hotspot or wifi in the hotel.

  Configuration has been fine and I was able to connect to my home network in wireless client mode. My router is a TP-Link TL-WR1043ND running OpenWrt 12.09 Attitude Adjustment, wifi with WPA2-AES, DHCP service.

  The Trek has been able to connect, and the whole system was running. Unfortunately, I realized, that the Trek has kept falling connections every 3-5 minutes with the genius of Netgear annoying pop up and try to re-establish a connection. Sometimes it worked, then the Trek cannot connect at all.

  Since I read that OpenWrt Attitude Adjustment can be problems with some wifi connections, I have improved my WR1043ND barrier breaker. The connection drops continued, including OSX almost every minute. The WR1043ND showed various DHCP-wifi-a failed-to-recognize-errors and in his diary.

  After trying all possible setting changes in the Trek-config (and shortly before returning the Trek), I found something as a workaround. In the Trek-config, I disabled the DHCP Server for the LAN area and assigned static IP addresses to connecting clients. Well at least so far, it seems to work very well. No more connections, no more boring engineering arise not interrupted and try to reconnect, the system seems to work.

  But for now, I'm a little confused as to the reason. In my view, the Trek connects to a hotspot and gets an IP address assigned by DHCP from hotspot. Then the Trek uses NAT to connect the clients attached to the internet. Actually the IP addresses of the DHCP assigned by the Trek to customers connected to the LAN area shouldn't affect hotspot NETWORK settings at all. Normally the IP address and private DNS settings are just for private clients LAN, aren't they? If I'm not completely wrong in my assumption, there could be a bug in the DHCP server on the hike or the way how dynamic the client LAN IPs are handled. From the point where I changed to static IP in the LAN client, there was no error message in the log of the WR1043ND.

  Strange thing... Maybe someone could correct me if my assumptions are wrong? BTW, I use the stock PR2000 Trek firmware (which is something like 1.0.0.9) since there is no other is available.

  Thank you.

  @hksteve I wish to inform you that the fix is now available from our download page.

  Feel free to update your firmware and provide feedback.

  Thank you!

• Windows XP DHCP problem when authentication network enabled

  I have a weird problem with Windows XP. Here's a few of my observations:
  -Computer Lenovo X 61 does not connect to a wireless network with a network (that is, Shared/128 b/WEP) authentication. He can never get an IP address from the DHCP server.
  -J' checked the authentication settings. They work in another computer.
  -If I give it a static IP address (less good family), it connects to the router. However, it is very slow and flaky.
  -It connects to open networks.
  -In addition, if I have a wireless and a wired connection to the computer, the wireless connection gets a quick DHCP server address. If I disconnect the wired connection, the wireless connection works perfectly.
  I tried to reinstall the NIC drivers, apply all updates for Windows and Lenovo SW and looked at the values in the Windows registry. Nothing seems to help.
  Any ideas?
  Computer is a Lenovo X 61 Windows XP Professional

  Hello

  In the past, password WEP engines were rather flaky.

  Try using the HEX string instead of the password.

  Or switch to WPA. WEP does not guarantee these days.

• Using 3500 as a Wireless Extender DHCP problem iPhone X 6

  Hello

  If all goes well, a simple question with a simple answer.

  Background:
  I stayed away from my DSL provider to a cable provider (VirginMedia). My new ISP is delivered with a modem cable (SuperHub 2 ac) and I connected the two devices together to extend my wireless home network. The cable modem, it's that the two routers are physically apart from others - connected through just their Ethernet ports - the technology of power line (Devolo dLAN 1200 +). Both routers have the same SSID broadcast, but on separate channels.

  Question:
  All devices in my house, the tablets of laptops, phones roam between the two areas wi - fi transparently * except * the iPhone 6 (iOS8.1), this works on the cable modem wi - fi, but not on the X 3500 wireless. I also have an iPad Mini 2 (also iOS8.1) which works too - aptly / wrong I have excluded iO8.1 as the issue. Oddly enough, the iPhone 6 connects to the x 3500 but isn't getting an IP address (the cable modem's DHCP server). Even if a static IP address doesn't help.

  Comments:
  If the X 3500 is configured as a DHCP server, the iPhoen connects (and gets an IP address), but then the default gateway is incorrect (gateway IP address of the X 3500 is not the modem cable remote). I can't find anywhere to specify a default gateway configuration.

  Question
  I start thinking, it is a problem with the iPhone 6 (know all other devices work correctly), but I want to just make sure I am the X 3500 configuration correctly. I am particularly interested in it if I use the right to 'Mode' ADSL / Ethernet. I tried 'Bridged Mode Only' (ADSL) and "Automatic DHCP only" (Ethernet), but does not seem to solve the problem of having the iPhone 6.

  any suggestions on how to fix / help would be most welcomed.

  Thank you!

  Thanks a lot for the details... Now I have a config that works also for the iPhone6.

  Basically, I connected the cable on the 3500 x port and the Ethernet port on the cable modem connected to the internet (via the Powerline). I then changed the network on the 3500 of 192.168.0.x x range (this is the range of network addresses used by the cable modem connected to the internet) to 192.168.168.x. Finally I activated the DHCP on the x 3500 which seemed to be the element that was killing the iPhone6.

  The iPhone6 connects now (which he always did), but with DHCP running on the x 3500 on the new range of network addresses of the iPhone 6 also get a valid IP address.

  Looks like that much just to get the iPhone 6 to work... never found a manual way to specify a default on the x 3500 gateway when you run DHCP (appears by default which is her own IP address - with no provision to change).

  Anyway... This works for now... I'll keep an eye on the iPhoen updates 6, just in case where the anomaly is something specific to the iPhone 6, if something changes I will post here.

  I have attached a picture for furture reference. Thanks again for your advice and support.

  

• Linksys WAP200 DHCP problem

  Hi, I have problems with the Linksys WAP200. When you use WPA/WPA2 Enterprise client hangs for about 60 seconds to try and obtain an IP address after a successful authentication. AccessPoints from other suppliers do not show this behavior.

  I did a tcpdump and comapred an accesspoint of another provider in the WAP200 work, and it seems that the WAP200 is reject bids that are sent via unicast DHCP. When the dhcp server sends an offer through broadcast after 65 seconds, it reaches the client and all is well.

  This is clearly buggy since the access point seems to be filtering the DHCP responses, is there an option to solve this problem?

  WPA is a known issue with the WAP54G as well. He breaks the wireless link entirely if you use Repeater/bridge modes. It is possible that Linksys a general isue with WPA in several similar products.

  So that it is resolved I feel Linksys just to be notified in writing. This also provides a written question should be wound.

  Concerning

  Fred

• Cisco AP 561 - DHCP problems

  Hello

  We have a customer with a number of AP561, there are 2 configured SSID, IP are provided for each network via dhcp, it is managed by a switch of small business and the other is managed by a windows client server.

  The issiue is that IP address are not always given to the devices, it will work for a while then just stop, until the AP is reset, this seems to be the same for several good AP so I don't think we have any physical AP questions, it can be solved in rest normally the AP.

  I see there are other discussions with people with the same problem, we have upgraded to the latest firmware 1.1.2.3 and the problem is still happening, force wireless is not a problem because the task bar displays full strength.

  Thank you...

  Hello Sir, I am sorry that you are having this problem. The latest firmware is actually 1.2.0.2

  Please download and update your Access Points. In the release notes, it is no indication that this new firmware solves the problem:

  CSCus23303: wireless client cannot get the IP address of the DHCP server after a period of time

  Eric Moyers
  .:|:.:|:. CISCO | Pre-sale technical support of Cisco | Expert on wireless

• SG300 and RVS4000 DHCP problems

  We recently deployed SG300-28 to replace a former 3Com switch.

  The installation program:

  In the SG300 switch router RVS400 and all workstations and server are connected.

  The problem:

  Windows 7 workstations are unable to get IP addresses of the server that is also connected to the switch.

  If, however, plug us into the workstations in the switch 4 ports on the back of the RVS4000 (the router), they get the IPs from the server without problem.

  It works perfectly with the old switch from 3Com for us it was classified in the category small business going.

  A few comments/advice appreciated! Thanks in advance!

  Pavol

  Pavol,

  Please make sure the SG300 switch running latest firmware 1.1.2.0, also new code then please switch factory reset after the upgrade. If you need assistance in upgrading please call Cisco Small Business Support Center @ 1-866-606-1866

  After upgrading please repost how these devices are connected and the configuration of your RVS4000 & SG300 switch series. Using RVS4000 for your DHCP server?

  Also make sure your RVS4000 is running latest firmware as well.

  Jasbryan

• Wireless DHCP problem

  Hello

  I have a problem

  We have cisco ap 500 series, it was light, but we have migrated to standalone, now, the scheme is simple.

  We have a 2811 router and dhcp created on this subject, we also f0/0.30 virtual interface with the ip address of 10.10.30.1

  Switch into a single interface (trunk) goes to f0/0 interface of the router, and a single interface (access) goes to ap

  The access point, we have BVI interface with 10.10.30.10 and default route to 10.10.30.1

  So when connecting to our SSID, it connect but doestn receive DHCP and APIPA address is, please explain why the ap assigns ip clients

  Also ap config.txt here

  Thank you

  Keita,

  Yes, sorry, it was not clear. Make your interface trunk switchport. You follow these steps on the switch:

  (config-if) # switchport trunk dot1q encap switch

  (config-if) # switchport mode trunk switch

  Justin

  Sent by Cisco Support technique iPhone App

• WLC and Linksys DHCP problem

  Hello

  I have a WLC 2112 and a DHCP Server enabled on a Linksys router. I set up a wireless LAn to have the IP address of the Linksys DHCP server, but it does not work and when I configure the DHCP anthor server it works.

  Can you help me please

  Your controller cannot ping the LinkSys Router? In addition, you set up the DHCP server on the interface of the controller, correct?

• Cisco 1921 & SG500 VLAN and DHCP problem

  Dear all,

  Thank you in advance for taking the time to read this.

  A little history:

  I want to install a project for an athlete, which is unfortunately on a budget pretty tight with a potentially large quantity of network users (~ 200 without public WIFI). I need to separate the 5 groups of users and to give them all access to internet without see each other. 5 user groups also share the same bandwidth to the internet and VLANs must be controlled bandwidth.

  To do this, I had planned to use Cisco devices built-in functions and buy a 1921 Cisco router as a switch of SG500.

  I have configured the router for 8 subinterfaces is internal NIC with 8 VLAN. I also configured DHCP Pools 8 on the 1921 and set up NAT and firewall.

  What I want to do now is have the SG500 to recognize the VLAN ID, I configured on the router (as well as on the switch using the same VLAN ID numbers), and then assign ports to the VLAN on the switch, and depending on where I plug into the switch, the device receives different IP addresses from DHCP.

  However, I can't get this to work. The router works fine, the 'intact' if left switch gives me an IP address from the DHCP server on the IP address of higher network VLAN (I.e. 168.8.0). but I can not configure the switch ports correctly so that it works. I was also confused, is that dhcp pools that I have configured on the command-line command on the router do not appear in professional CP in the mask of the pool.

  Can someone kindly check the configuration of the router and throw some guidance on how I need to configure the Ports on the SG500? I must say that I have had too many nights and I seem to confuse tagging, untagging, to exclusion and prohibiting the ;.)

  I have the router for you here:

  Thanks again and good night!

  W.

  Hi Wolfgang, for the sx500 configuration can be something like this

  config t

  database of VLAN

  VLAN 2-8

  int item in gi1/1/1

  switchport mode general

  switchport trunk allowed vlan add 2-8 tag

  switchport General disable filtering of capture

  For any client that connects must be no tagged coelio

  So if you want a client access port then you should do something like 5 unidentified to this port

  config t

  int item in gi1/1/2

  switchport mode access

  switchport access vlan 5

  -Tom
  Please mark replied messages useful

• SGE2000 relay DHCP problem

  I'm looking for more help with DHCP relay on a switch SGE2000.

  I have configured the two VLAN on the switch, (192.168.10.x/24) VLAN2 and VLAN3 (192.168.9.x/24). I have the Layer 3 switch. I configured the 192.168.10.4 DHCP and the DHCP Interfaces like VLAN3 relay server. All static IP Routes have been generated by the switch.

  If I put a client computer on a port which is Untagged VLAN 3 and try to get a DHCP address from the server on a port that is not tagged VLAN 2 I never get a response.

  I made a few captures package and here is what I found:

  1. I see the DHCP on the client computer
  2. I see the DHCP Request to the DHCP server from the IP shown in the switch to VLAN 3 (192.168.9.254)
  3. I see the server DHCP responds with a DHCP offer
  4. The DHCP offer never gets the client computer

  I can't get a DHCP address to any system not on the same VLAN as the DHCP server. 82 option is disable, and tried him, that made no difference.

  Any help would be great.

  Thank you

  Phil

  Hi phil,.

  Have you created a static route on the DHCP server that points to the network 192.168.9.0/24.

  The entry door for this network, in the perspective of relay DHCP servers, is the IP address of the switch SGE2000 VLAN2.

  I think that if you tried to ping to the IP address of the switch VLAN3 with the DHCP server now, you will not get a response.

  When you create a static route to be persistent in the DHCP server, you should then be able to address IP VLAN3 ping of the switch.

  Best regards, Dave

• install 10g release 2 standard edition. Address DHCP problem

  I get a warning "installed detected that a primary IP address of the system is assigned DHCP." I have to configure the microsoft loop back adapter for the main card in the system. I don't know what to do.

  Hello

  The main map is determined by the order in which you installed adapters: this is the last card is installed. If you install additional network cards after installing the loopback adapter, you need to uninstall the loopback adapter and reinstall.

  See Install Doc...

  http://download.Oracle.com/docs/CD/B19306_01/install.102/b15681/reqs.htm#BABGCEAI

  If this help you score as useful... thx

  Kind regards
  Levi Pereira

• DHCP Server R2 2012 problem

  Hello world.

  I am new to Windows Server. I'm setting up a server to connect thin clients and use it only as an internet point.

  Server roles installed: SC AD, AD DS, AD FS and AD LDS, AD RMS, App Server, DHCP, DNS, file storage Services, Hyper-V, IIS, IPAM, NAP, remote access, Remote Desktop Services. GOING to Services, WDS, Windows Server Essentials experience, WSUS Server Local, all servers.

  My problem is that DHCP does not dynamically IP addresses in the clients. In trying to check the DHCP problem, I used followed enough of ipconfig ipconfig / renew and got the error message "an error has occurred during the renewal of the vEthernet of the virtual interface (my static IP port): unable to contact your DHCP server. I even removed then added the DHCP function and no change.

  What I am doing wrong? Help, please!

  Other tips on this deployment will be welcome, because I'm out of my League here and have no money to wait for him.

  PS. I downloaded and installed SELFSSL for safety certification, as is (without modification).

  Hello

  Post your question in the TechNet Server Forums, as your question kindly is beyond the scope of these Forums.

  http://social.technet.Microsoft.com/forums/WindowsServer/en-us/home?category=WindowsServer

  See you soon.

• After running jetpack.exe DHCP database

  Currently we have two DHCP servers and seems to have been corrupted. I ran the JETPACK. Tool EXE to compact the database, but instead of compaction of the database, it has increased in size. Our DHCP database was 2MB in size before running the tool and after running the tool, it is passed to 3 MB. Has anyone ever encountered this problem before, and if so did solve all your DHCP problems, or if it has caused more problems.

  We turned off from the DHCP server on our server problem, we have not started the server with the database update I'm not sure if this solves the problem or just cause more problems and affect our another DHCP server.

  Any help would be appreciated.

  Thank you

  Hi Vince,.

   
  This problem would be better suited to the TechNet community.
  Please visit the link below and send the request to help on this issue.
  http://social.technet.Microsoft.com/forums/en-us/category/WindowsServer
   
  Thank you.