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Help Can you help, now it says it cannot contact my DHCP server?

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Try this link. It explans what a DHCP is and how to configure it.
http://www.howtoforge.com/dhcp_server_linux_debian_sarge

Posted on Jun 20, 2008

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Why Addresses in the IP Address Pool on a Switch Are Exhausted When the Switch Functions as a DHCP Server and It Has a Few Clients?


If the IP address pool has much more resources than needs of clients, the following two reasons may cause address exhaustion:
1. An attacker keeps changing the CHADDR field and sending DHCP Discover packets to exhaust addresses. If so, contact Huawei engineers to deploy DHCP snooping to protect the IP address pool.
2. The DHCP server ping function is enabled on the DHCP server. This function tries to ping the allocated addresses before responding to DHCP Offer packets. If a client responds to any ping packet, the DHCP server considers that there are address conflicts and addresses are exhausted. To solve this problem, two methods are available:
1. Capture packets on the ports connected to the DHCP server. If a client responds to ping packets, prohibit the client.
2. Disable the DHCP server ping function using the undo dhcp server ping packet command.
3. Such as S5700, S6700

Aug 01, 2016 | Computers & Internet

1 Answer

I am trying to disable the NAT settings on my TP-Link WR642G


Find the DHCP settings From DHCP menu
Turn off the DHCP server (which you have)
Save your settings

If you need any kind of technical assistance you can contact support cell at http://www.vtechsquad.com/

Jan 13, 2013 | TP-LINK TL-WR1043ND Router

2 Answers

We have a DHCP problem with our thin client HP T5540, the network interface can't get an ip address fom the DHCP server for 30 seconds so it can't connect to citrix xen serverver for virtualization...


First of all check the configuration of the unit if it's AUTOMATIC IP/DHCP, if all OK you can test by configuring a static IP (use an unused IP in the server's DHCP table) than check the connectivity (ping something), if that works you have a server rule/DHCP or DNS problem

if it's still not working check the cabeling and connectors for connectivity (with a good cable tester) or an other (working) computer.

Good luck!

Oct 22, 2010 | HP t5540 VIA Eden 1GHz Thin Client...

1 Answer

I am trying to setup my set up a Access Point at my house with the following product. a EnGenius EOC 2611P. when i set security on the device it is not sending an ip address to the computer. is there a...


Assigning an IP address to a computer is a function of DHCP. Either the access point's DHCP server much be enabled, or a DHCP server somewhere on the network to which the AP provides a path must be enabled. There should be only one DHCP server per LAN.
For example, if you have a home router handing out DHCP addresses to computers in your home, and you wire this AP to your router to wirelessly serve an additional computer or computers in a remote location, then its DHCP server should be off, because DHCP service will be performed by your home router to both local and remote computers.
However, if you connect this AP directly to your network interface and serve ONLY computers in a remote location, then its DHCP server should be on, so that it will provide DHCP addresses to the remote computers (because your network interface in general won't, unless it is also a router itself, in which case see the previous paragraph).

Aug 28, 2010 | EnGenius EOC2610 80211g Outdoor High Power...

1 Answer

"Couldn't contact DHCP" error


Check on the router if you are distributing enough IP addresses.

Jul 30, 2009 | Polycom SoundPoint

1 Answer

DHCP installation problem


First of all, read this M$ article on setting up DHCP: http://support.microsoft.com/kb/139904

Secondly, check the following:
1. You have defined a valid scope and ACTIVATED it
2. You have AUTHORISED the DCHP server in Active Directory (see http://technet.microsoft.com/en-us/library/cc759688(WS.10).aspx)
3. Make sure that there are enough unused IPs in the address pool
Make sure that the DHCP server service is running - and check the EVENT LOG for errors
4. Make sure that there is no other, especially unauthorized, DHCP servers (i.e. router with DHCP enabled)

Actually the best article overall to review is http://technet.microsoft.com/en-us/library/cc781697(WS.10).aspx, which gives a big picture view regarding the role of DHCP autorization and what can happen in a mixed environment

May 21, 2009 | Microsoft Windows Server 2003 Enterprise...

2 Answers

Sending DHCP request across diffrent vlans


Hmm... on your DHCP server, try setting the "default router" IP for each pool to be the VLAN ID on the switch.

scope 172.16.0.0 /24
router 172.16.0.1

scope 10.20.8.0 /22
router 10.20.8.1

I think the DHCP replies aren't going back where they should. I've never done this without a router doing all the DHCP, but it does work and i've done it many times. Your config looks spot on for the switch.

Feb 01, 2009 | Cisco Catalyst 3750E-48PD

1 Answer

Dhcp in server 2003 in domain not working


Windows 2003 server supports DHCP. If you don't see in Administrative tool DHCP maybe the DHCP role is not enabled. You can add this role in "Manage your server". You don't need to reinstall win 2003 server.
Another way to access DHCP management tool is: in command prompt type mmc and then File> "Add remove snap-in" then "Add" and select DHCP.

Jan 06, 2009 | Microsoft Windows Server Standard 2003 for...

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