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Questions tagged [dhcp]

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

The Dynamic Host Configuration Protocol (DHCP) is an auto configuration protocol used on IP networks and an extension of the Bootstrap Protocol. DHCP allows for computers to be configured automatically to communicate with each other over an IP network without the need for manual setup by a network administrator.

The implementation of DHCP relies on a DHCP server to hand out network configuration information to DHCP-capable clients that request an IP address (and other information required or useful in communicating with other devices on an IP network). In addition to an IP address, common configuration information served over DHCP includes a default gateway, subnet mask and DNS sever(s), though there are many more possible configurations that can be sent out using the DHCP protocol.

More in-depth detail on DHCP and its implementation can be found at Wikipedia.

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DNS Record Timestamps Are Not Updating on Server 2008 R2 DNS Server

I have 2 Server 2008 R2 domain controllers with a AD integrated DNS zone for the domain. Previously, scavenging was not enabled. I enabled scavenging a week ago and now that I am seeing old stale records go away, I am also noticing that about 80%…
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Requesting >1 IP addresses via DHCP

I'm wondering whether it is possible to configure a Windows 7 machine to request more than 1 IP address? I'm doing some testing and it would be useful to have 2 local IP addresses however, the network I'm on is using DHCP so I don't want to pick one…
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Disabling Netbios over TCP/IP via DHCP does not work

I'm working towards disabling Netbios over TCP/IP for my organization. I've created a reservation for my MAC address. I can see that the reservation becomes active when I renew my IP address. I set option 001 under the Microsoft Options vendor class…
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DNS Server address configured inside Router not working

Well, I have an ISP router in which I have configured DNS Servers to use (Primary & Secondary) like Google DNS. It works just fine. But now I have setup a computer with DNS server (Simple DNS Plus). I got it working by settings my internal DNS…
Charandeep Singh
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Web interface for managing an ISC DHCP server

I am looking for a web interface to administer an ISC DHCP server. I have the setup of one Debian Linux box running an ISC DHCP server and I would like to add a second DHCP server as failover. To facilitate administration for non-UNIX experienced…
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Using DHCP with Multi-Homed NICs

I am trying to steer away from our current manual addressing system and embrace the decades-old wonder of DHCP. In our domain and even at my home network DHCP is great - I can use address reservations to handle the need for static IP. However, in…
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Getting same IP address for cloned Virtual Images

I was trying to install 3 VM and instead of creating them individually (by using the New VM) I actually cloned them. Now after I start the VM (they are running in the bridge mode) all the VM's are getting the same IP address. I'm using auto DHCP for…
bi0s.kidd0
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Disable static IP addresses on desktop computers

Is there any way of not allowing users to statically set an IP address on their machines? We have a lot of servers with static IP addresses and also a DHCP server. I am afraid of allowing users to set a static IP address on their machines and they…
Rafael Colucci
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How do I specify the DHCP IP address ? (CentOS 5.3)

I would like to shorten the bootup time of my CentOS Virtual Machines. They are spawn up automatically during our test cycle. We noticed that it could take up to 15 seconds to obtain an IP address from the DHCP server, and suspect it has to do with…
Itai Frenkel
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Ranges for Multiple DHCP Server: Better to overlap or separate? wireless vs ethernet clients?

I know there are mixed feelings about running multiple DHCP servers on one LAN, but I'm wondering about the best way to set their ranges. In my case, I have a router which performs DHCP and also my Ubuntu Server which I use for FOG ghosting (among…
neildaemond
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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 computers, 6 network printers, 16 IP phones and between 5…
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Can a DHCP reservation use an IP address in the exclusion range?

Windows Server 2008 R2, running the DHCP service. DHCP Scope: 192.168.1.1 - 192.168.1.254 Exclusions: 192.168.1.1 - 192.168.1.99 If a reservation uses an IP address in the exclusion range (like 192.168.1.42), what will happen when that specific…
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Reserve a single ip for a wired and wireless NIC of the same machine

I'm using w2k3 dhcp server, and I've reserved an IP adress for my laptop to facilitate port forwarding. I previously had a pure wired network, but I just added a WiFi router to this network for the obvious benefits of wireless, but I want to keep…
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Windows Server - DHCP/DNS Updates - purging outdated DNS records

We have Windows 2008 Servers running and providing DHCP and DNS Services to the network. So far everything is working great. The problem is, the clients which are provided with IPs from DHCP are automatically listed in DNS with their respective…
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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 the file they'll boot etc. However, I need to add a…
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