DHCP stands for Dynamic Host Configuration Protocol and is an auto configuration protocol used on IP networks and an extension of the Bootstrap Protocol.

learn more… | top users | synonyms

2
votes
4answers
989 views

Why use DHCPv6 over Stateless Address Autoconfiguration?

IPv6 and RFC 2462 provide a means for hosts to configure their own IP addresses via stateless address autoconfiguration. To me this seems like the bee's knees, and it leaves me wondering why someone ...
2
votes
3answers
1k views

Can i configure dhcp on windows server to assign fix ip address all the time

I re-framed my question for better clarity http://serverfault.com/questions/110835/automatic-allocation-on-windows-dhcp-server Is there a way to configure dhcp server to give same ip address to NIC ...
2
votes
5answers
3k views

Having a domain controller on the same network as a wireless router

I have a win server 2k3 machine as a domain controller and a dhcp server. All of the wired machines work fine connecting to the domain controller and authenticating but the users that connect to the ...
2
votes
5answers
1k views

Server 2003 takes alot of DHCP addresses, althought DHCP is disabled

I have a problem where Windows Server 2003 takes lots of DHCP addresses althought there is only 1 NIC in that server and with DHCP disabled (see information below). However, as you can see, MAC ...
2
votes
3answers
574 views

How can order of IP addresses issued be controlled?

Every home router I've setup/used issues addresses from low to high. However, dhcpd from the Internet Systems Consortium seems to issue addresses in reverse order - ie, high to low. Is there a way ...
2
votes
4answers
14k views

DHCP Server Slow to give out IPs

My Windows 2003 server standard DHCP server takes 30-45 seconds to give out an IP to XP clients. I've never seen one this slow before. The server is not overwhelmed. We are on 100 Mbps switches. ...
2
votes
4answers
2k views

Windows DHCP Server Priority

How can I set the priority of DHCP servers to get a lease from in windows (XP)?
2
votes
2answers
2k views

Windows 2012 DHCP server with 2 NICs

I have a Windows 2012 Server with 2 NICs running as a DHCP server. Each NIC is connected to a different subnet. I'd like to run DHCP service on each subnet from the same server. Is that possible? ...
2
votes
3answers
736 views

Can I run a single DHCP Server for all branches of an MPLS?

We have a two-location MPLS. I am told by the ISP that I can have a single DHCP server to service both branches. But I don't understand this. Consider this: Location1 (Host branch with the DHCP ...
2
votes
2answers
1k views

DHCP - Will it dish out IP's and DNS details to non-domain joined computers?

The question is essentially in the title - I'm very new to servers and AD (studying for my first exam as of now and messing with VM's). My query is really, with DHCP installed in your domain, will it ...
2
votes
2answers
360 views

Multiple DHCP servers available to virtual networks in VMware - how to set priority?

In a VMware ESXi 4.1 lab environment*, I have a pair of virtual networks configured (10.0.4.x and 10.0.10.x). On both networks is a DHCP server. The problem is that the networks are routable to each ...
2
votes
3answers
6k views

Multiple Subnets on home network… would this work? [closed]

We are looking at renting out the basement suit in our home and want to offer internet as part of the package. I however do not want the downstairs tennent to have access to our network (home office ...
2
votes
1answer
5k views

Is it possible to give static IP to clients in pfsense

I am using pfsense and it provides an IP address to all clients. Is there any option in there so that I can define the client IP address based upon their MAC address, so that I can measure how much ...
2
votes
4answers
2k views

How can I avoid Mac OS X temporarily setting its IP in the “link-local” range (169.254.x.x) at boot time?

I have a DNS and DHCP server (Linux machine) managing my LAN addresses and names. Everything is configured and fully working once the clients are up and running, having every Mac OS X client a DHCP ...
2
votes
1answer
1k views

Very long 'Unique ID' in Windows 2008 DHCP Server Leases - why? What is the device?

I notice on one Windows 2008 R2 DHCP server the device with the first IP in the range has a strange looking Unique ID of the format ...
2
votes
1answer
865 views

Difference between DHCP options 'Domain-Name' and 'Domain-Search'

What is the difference between the two? I had thought that domain-name would put the client on the specified domain (ie. If the domain-name was set to "foo.bar" the clients FQDN would be ...
2
votes
2answers
1k views

How should I integrate Active Directory with Windows clients and Linux clients and servers

I have Windows and Linux clients and I want to provide Active Directory authentication for both but keeping DHCP and DNS on Linux servers. Is this possible ? I have very little experience in ...
2
votes
3answers
2k views

PXE with DHCP on another server

Hi I have the following setup : A router that does DHCP a PXE server (VMware workstation Bridged mode) a client I want to boot on (VMware workstation Bridged mode) I was following this guide on ...
2
votes
3answers
5k views

Multiple PXE server same subnet

I've been struggling with this for some time. I have a few test machines that boot from the network, they receive the boot data from the DHCP server, this tells them who is the boot server where is ...
2
votes
7answers
1k views

DHCP Starvation, A Trivial Solution?

I know there are a lot of solutions out there for mitigating DHCP starvation attacks. But wouldn't a really simple solution be to just set the DHCP address pool to 1.1.1.1 - 254.254.254.254 (or some ...
2
votes
3answers
2k views

Is there any way to prevent DHCP server conflicts?

When I ordered the internet connection for work, they threw on a "bonus" router. It's a a 2wire gateway "every service we can cram in a box" type of thing. This is not what I preferred to work with, ...
2
votes
2answers
651 views

How to make sure clients use only the IP assigned via DHCP

We want to limit the users Internet usage on a daily traffic basis but not the local network bandwidth. Our users are on different platforms (Windows, Android, IOS), therefore it is not possible to ...
2
votes
2answers
1k views

Can a Windows DHCP server serve a scope that it is not a part of?

The situation I have a windows SBS 2008 box running as DC/DNS/DHCP/Exchange/File Server to a network on 192.168.1.0/24. Suffice it to say that the IP of the SBS box is immutable. At some point in the ...
2
votes
1answer
2k views

Why does DHCP have fixed client and server port numbers

In most client-server-applications, the port number of a server is a well-known number, while the client uses a currently available port number. DHCP is different. Here, both the client and the server ...
2
votes
2answers
674 views

How to configure DHCP to assign devices to subnets?

I have Windows 2008 R2. There are three classes of devices on our network- IP phones, Handheld (WM5 & 6) devices, and everything else (Computer, printers, servers). I use 2 Cisco Catalyst switches ...
2
votes
1answer
176 views

AD server within another network - DNS issues

Here's a quick summary of the environment I support: we have a domain (domain A) that has about 20 client computers. The domain server for this domain and all the clients sit within the network ...
2
votes
3answers
10k views

DHCP server for multilple VLANs [duplicate]

Possible Duplicate: Can I have multiple DHCP servers on one network? This is a very old question i guess.In this forum itself it has been answered in Multiple VLANs, multiple subnets, ...
2
votes
1answer
400 views

Windows 7 routing traffic through the gateway for local addresses

Windows is adding a route for a local address (10.0.0.90 - my fileserver) with a gateway of (10.0.0.138 - this is my gateway), the gateway only has a 100Mbs link so all of my fileserver bound traffic ...
2
votes
3answers
566 views

Connection of a 10/100Mb adapter to 1000Mb LAN

I have the following problem. I cannot get an IP address using DHCP. I have a 10/100Mb adapter on a set-top box connected to a 1000Mb LAN. When I boot up the set-top box it gets an IP from the DHCP ...
2
votes
2answers
5k views

Routing between subnets with one router?

I have a Draytek Vigor 2820 which is connected to three gigabit Netgear Layer 2 switches. Currently the network is fairly simple, 192.168.1.0/24. One the network I have 7 servers, around 50 ...
2
votes
3answers
447 views

Multiple DHCP servers on the same subnet

I am in the process of configuring a new Server 2008 R2 domain controller in our enviroment and have a question regarding DHCP. Is it safe to have two dhcp server on the same subnet with the same ...
2
votes
1answer
574 views

DHCP not working through long bridged network

I have setup a hotspot at my local harbor. I have encountered a problem with my setup. The accespoint that creates the hotspot connection is a out door long range antenna from UBNT. The distance from ...
2
votes
3answers
87 views

can dhcp, or domain controller, update time in client machine

I want to update the time on client machines in my domain. Can DHCP or Domain Controller update the windows time in client machines ?? if Yes, how to do that ? Please include steps
2
votes
2answers
2k views

Two DHCP servers in the same scope - what happens when one runs out of IP addresses?

We have two DCHP servers on our 192.168.0.x LAN. One server gives out 192.168.0.100-169 and the other gives out 192.168.0.170-239. The 2nd server only has 9 IP addresses left whereas the other has 40 ...
2
votes
2answers
427 views

Get IP from DHCP - Ubuntu

apparently someone on my LAN is running his own DHCP server (by mistake i assume) and broadcasting an address (yep it is 192.168.1.155) prevents me to connect to the 'real' DHCP server ...
2
votes
2answers
663 views

Two DHCP bindings

Please help me resolve very stupid question: Here is situation: OS: 2008 R2, DHCP service, 2 NICs So, the main goal is to make two scope on DHCP service, each of scope will link to each of NIC. Any ...
2
votes
2answers
7k views

DHCP Configuration for Windows Deployment Services

I have Windows Deployment Services (WDS) currently running on one of my servers (within a domain of course). I have another machine running as a DHCP server, which is outside of the domain. I don't ...
2
votes
1answer
5k views

How to ignore a set of Mac addresses in dhcpd.conf?

Is it possible in dhcpd.conf to ignore requests from a set of MAC addresses? Something like this: host vminstances { hardware ethernet d0:0d:*; ignore booting; }
2
votes
3answers
1k views

Same or separate subnets when connecting two buildings via a wireless bridge

We have two buildings about 200 feet apart connected via SMC's outdoor wireless bridge. Currently, both buildings are on the same subnet with one DHCP server in the main building. This seemed to be ...
2
votes
4answers
3k views

How to install DHCP server on FreeBSD 7.2?

I have a clean install of FreeBSD 7.2-RELEASE. I want to install a simple DHCP server for a few windows computers. But, unfortunately, following don't work: pkg_add -r isc-dhcp3-server Error is: ...
2
votes
4answers
4k views

Option 82 and dhcpd. “No free leases” for second computer

There is DHCP server in network (isc-dhcpd-server-3.0 on FreeBSD 7.2) than gives one IP per switch port to every user via Option 82 The problem appears when user disconnects one of his computers and ...
2
votes
1answer
57 views

Are MAC ID passed via DHCP Relay

Do MAC ID pass through dhcp relay? Even if its connected on the WAN from the internet? So if the DHCP Server is on the WAN of the router and connected to a DHCP server on the internet is it passed?
2
votes
1answer
105 views

Two LAN cables when using Remote Access Card?

I recently bought a HP MicroServer N54L and a HP Remote Access Card. Connecting to the server over a KVM viewer for BIOS setup etc. works fine, but when it comes to installing Ubuntu 14.04. the ...
2
votes
1answer
669 views

DHCP Warning Sign Icon On Windows Server

I have a Windows Server 2008 R2 SP1 Domain Controller. I have the roles AD, DHCP, and DNS installed on this server. I noticed today that there was a warning sign on my IPv4 setting, but not on my IPv6 ...
2
votes
1answer
460 views

Can Windows Server 2003 DHCP Server assign multiple IP Addresses to a single host?

I have Windows 2003 Server handling DHCP for our network. We use reservations to assign some hosts IP addresses. Is it possible for the server to assign a single host two IP addresses in different ...
2
votes
2answers
630 views

Static lease IP dhcp within dynamic range pool

I am using fedora 13. I want to statically bind a MAC to IP. Now the problem is if the IP is within the range pool, it may get allocated to some other host also. For that I use a tweak, where I ...
2
votes
2answers
170 views

DHCP/static IP nomenclature

I've just inherited systems administration for a small network, on which we have exclusive access to the first 128 IPs on a private virtual subnet. We have a DHCP server which binds IP addresses to ...
2
votes
3answers
15k views

PXE boot fails to get IP address via DHCP, but DHCP works when OS booted

I'm trying to PXE-boot a Cisco UCS C240 server to install a new OS over the network, but it isn't picking up an IP address via DHCP during boot. I get the "No DHCP or proxyDHCP offers were received" ...
2
votes
1answer
968 views

When does ISC dhcpd expire leases

When exactly does ISC dhcpd forget a lease that is not explicitly freed by the client? Context: I am running an installation with many small pools (3 address) and it does not seem to cope well when ...
2
votes
1answer
3k views

Mac OSX server command equivalent for dhclient?

Is there an MacOS command that makes a dhcp request, and renews the old lease, drops it for a new one, or usefully reports errors or lack of response from a dhcp server? This would both help fix ...