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

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Force DHCP Reservation Updates to Secondary DHCP Server in Windows Server 2012 R2

I have setup and configured two DHCP servers on my private network in load balancing mode as outlined in the following technet article: http://technet.microsoft.com/en-us/library/dn338979.aspx Both ...
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1answer
36 views

2 NICS using Windows Server 2012 as “gate”

I want to use my windows server as a gateway and DHCP for my local network. It have 2 NICs where one will be connected to the internet and the other to my local network. There are no router on the ...
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0answers
278 views

Libvirt providing bootp options without being configured to do so

I have a virtual network configured in libvirt and configured to provide DHCP (via dnsmasq) but not configured to provide bootp information (see below), but when I boot an iPXE ISO and look at the ...
0
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1answer
54 views

DHCPD: permanently leased IP being offered (twice) to random node and assignee

Greeting. On a small LAN (< 20 networked devices) with a cento6 5.9 server/dhcp-3.0.5-33.el5_9). I am configuring permanent leases thusly (dhcpd.conf, partial): range 10.115.64.60 ...
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1answer
573 views

Cross-VLAN sharing and auto-discovery of selective resources

I have a network with several VLANs that each contain resources or clients with different access rights. For simplicity, let's say I have 3 VLANs: ID 10: Contains privileged clients and private ...
0
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1answer
128 views

Migrating from static IP adresses to DHCP

I've just landed my first job as a sysadmin, and my workplace is still using static IP adresses. Informations about adresses are kept in a textfile that is not up to date. So, my first task here will ...
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0answers
252 views

Configuring an IPv6 FreeBSD router works on boot only

I am trying the following: I am having a DHCPv6 server (machine A) with a /48 subnet which will delegate /64 subnets to other routers using the prefix delegation mechanism. One of these routers is a ...
0
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1answer
54 views

Is there a Linux DHCP server that supports assigning different DNS servers to a given host?

Is there a DHCP server that runs on Linux which will allow me to configure what DNS servers get assigned to which host? E.g. If I have 192.168.0.10 and 192.168.0.20 on my network, I'd like to make it ...
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1answer
510 views

DNS A records disappear, but PTR records still remain

We've been having issues with DNS records dropping. Usually it is from DHCP reservations, like printers. Yesterday it was two of our main servers, also DHCP-reserved. Right now I'm looking at a ...
0
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1answer
184 views

Cross over cable network with DHCP On in one machine [closed]

Network novice here. I need to setup a small network (cross over cable) between a windows server 2008 and Raspbery Pi. And I need to have DHCP service running in my windows server and it should assign ...
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0answers
474 views

CentOS DHCP server not updating DNS nameserver on Ubuntu Client

I have a working DHCP server on CentOS, with /etc/dhcp/dhcpd.conf set up as follows: subnet 192.168.1.0 netmask 255.255.255.0 { option routers 192.168.1.1; option subnet-mask 255.255.255.0; ...
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0answers
112 views

DHCP fault tolerant servers: Split pool or failover?

I need to replace an aging DHCP server by a fault tolerant solution. I consider using the ISC dhcp server solution which can be setup either as split servers serving non-overlapping ip ranges or as a ...
0
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1answer
149 views

dhcp dns not resolving queries

I having been working through a lot issues with a setup and I reached another where I may have been staring at it for too long to see the issue. The server is reachable from the outside world. ...
0
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1answer
239 views

send message to connected computer when IP obtain from DHCP Server

If a computer running Windows gets a IP address from DHCP Server, how could I send a message to that computer. Say DHCP Server running from Ubuntu Server. I am guessing through SMBClient? Or is this ...
0
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1answer
293 views

Add IP address to Ubuntu 13.10 and separate webserver requests

I've got a Ubuntu 13.10 VPS server with 1 IPv4 (111.111.111.111) (and 1 IPv6 address). I recently requested an extra IP address (222.222.222.222) but I can't seem to figure out how to add the new IP ...
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0answers
72 views

coova and dhcp server running on same device?

I need to run coova on a device that does not easily disable it's built-in DHCP server or the IP address on the WiFi AP interface facing the WiFi clients. This means both coova DHCP and device ...
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2answers
213 views

client's not receveing internet with dhcp. does if i use static

i reloaded my ad, dhcp, dns server 3 day's ago. server 2008 enterprise. and we are having a problem. only the server issue's the ip. all files share's, ad, etc works. can ping and remote desktop ...
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0answers
71 views

How to setup metric for routers on CentOS DHCP server

I have a simple DHCP server running on CentOS 6 with the following configuration: subnet 192.168.1.0 netmask 255.255.255.0 { allow booting; allow bootp; ddns-update-style none; range ...
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0answers
110 views

How can I find which application is changing my routing table? [closed]

My setup is: Panda <--> PC. PC runs DHCP server. Panda gets IP settings from PC. After DHCP is done Panda has the following routing table: Destination Gateway Genmask Flags ...
2
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2answers
391 views

DHCPD clean leases on client disconnect

Is there a way to force ISC DHCPD to trigger expire or release for static lease right after client disconnect? I want to trigger a script right after client connects ("on commit" DHCPD event) and ...
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3answers
158 views

Prevent IP conflict from untrusted network machines

I maintain a small LAN (192.168.1.0/24) on which we have several untrusted machines, where the users of those machines have administrative rights or are able to connect their own machines to the ...
3
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1answer
348 views

Windows 2008 R2 DHCP - client renewing too frequently

We are running a Windows 2008 R2 DHCP server. We just added a new DHCP server and removed the old one about three weeks ago. I have an employee who is reporting IP conflict errors every day now for ...
1
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1answer
80 views

PXE Booting: Default boot file name?

When implementing PXE booting, is it necessary to specify a specific boot file in the DHCP options, or can you have a default boot file and so not specify that option?
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1answer
410 views

Push hostnames to a DNS server without DHCP

Considering the complete lack of luck I've had googling any terms related to this question, this may not even be possible, but: Is there a reasonably standard way to set a hostname on a machine, and ...
0
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1answer
131 views

Multiple DHCP servers on a single physical network?

Today i got put on a project to solve a networking project for a friend who rents out multiple office suites. Internet is provided to all suites in the rent cost. The guy who originally set everything ...
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2answers
119 views

Assign private IP via DHCP + public IP

I would like my Ubuntu VM to have both a private IP and a public IP. The private IP should be supplied by my DHCP server. Currently I am trying this: auto lo iface lo inet loopback # The primary ...
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1answer
120 views

Enterprise DHCP server solution? [closed]

I have a network of about 1000 assorted devices, all of witch are running by static IP addressing. Given the size of the network and the lapse of technical advice, the addressing scheme is in chaos ...
2
votes
1answer
5k views

What else does “netsh int ip reset” do?

According to this KB article when you run the "netsh int ip reset" command, all it does is to reset the content of two registry keys: SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\ ...
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2answers
988 views

PXE DHCP configuration with existing DHCP server

How does a DHCP service need to be configured, so that it handles PXE requests while there is still another DHCP server on the network? I managed to set up a working PXE system in a separate ...
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2answers
108 views

Centos TFTP boot server without a dhcpd server

Good Day, I want to ask the comunity if it is possible to setup a TFTP boot server without running a local dhcpd server on the local box? The setup currently looks like this? What is currently ...
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1answer
32 views

Setting up DNS for Remote Access

I have Windows 2012 with the DNS/DHCP features installed. Do I need to install Active Directory and then add all my machines to the domain of local.FQDN.com for example? I can do this and still use ...
0
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1answer
271 views

CentOS 5 domain-search from DHCP server ignored by dhclient

I have a DHCP server running ISC dhcpd which offers the option domain-search "domain.local"; option. This is being ignored by a particular CentOS 5 dhclient which is removing the search parameter in ...
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votes
1answer
187 views

2 DHCP Server it is possible to set a default server and a second

i have the following question (Problem) i have a AVM Fritzbox 7390 as WLAN Router and there is DHCP-service running with a range of 50 adresse. so far i works nice. Know i would like to have a PXE ...
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0answers
41 views

DHCP Randomly Not Assigning Addresses

Having a strange issue for the past day or so. Some users (probably about a dozen, dozen and a half out of 100 or so) are having trouble pulling DHCP. They are getting the private IP address. If I ...
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votes
3answers
137 views

Why first dhcp server not used? [closed]

I have hardware connected to router with DHCP server. That router has MAC reservation to make sure hardware be assigned to specific IP. When this setup isolated everything is fine, but if I connect ...
0
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0answers
114 views

How do I stop a Linux computer from sending a DHCP hostname?

I need to set up a Linux computer so that it uses DHCP but doesn't send any hostname at all. I'm using isc-dhclient-4.2.4 /etc/dhcp/dhclient.conf contains the line send host-name = gethostname(); ...
2
votes
2answers
378 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 ...
4
votes
2answers
214 views

Set specific DHCP options on a static IP address connection

Our network has some not-commonly used DHCP options on it, including some vendor-specific options (e.g. option 002 for Time Offset set to 0x9AB0). I have one particular computer that for whatever ...
0
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1answer
166 views

dhcpd update bind dns server on non standard port

I have most of a dynamic dns set up working. I can manually update the DNS entries using nsupdate and my dhcpd.conf file will attempt to set the DNS entries. However this fails as I don't have bind ...
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0answers
154 views

Laptop using DHCP lease from another network

We have a laptop with intermittent wifi connectivity problems. Rebooting often helps. Today while digging around I noticed that its DHCP IP address and gateway are not addresses on our subnet. The ...
2
votes
1answer
799 views

WDS deploying Different architectures (64-bit and 32-bit) with a single boot image

At the moment I have a WDS server set up with 2 Windows 7 boot images (32 Bit and 64 Bit) because we are running a mixed environment which will stay mixed for the near future. We are moving to a VLAN ...
1
vote
1answer
53 views

Lost as to what I'm not doing in setting up a home lan network [closed]

I'm a PC repair tech and this is a problem I've recently been trying to troubleshoot for a customer. Upstairs they have the main router which servers as the gateway and router, both hardwired and ...
0
votes
2answers
284 views

How to DHCP request a second, different, IP for the same physical interface?

(Similar to this question, but with two different DHCP-assigned IPs) Is there any way to let dhclient or dhcpcd request two different IPs for one physical interface, e.g. via virtual interfaces eth0 ...
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0answers
68 views

DHCP server with ability to update mac address dynamically

Is there a better way to maintain MAC to IP specification in dhcp with out restarting dhcp service each time when there is an update. is it possible to use DHCP with database in Linux to save all ...
2
votes
1answer
2k views

Aliased network interfaces and isc dhcp server

I have been banging my head on this for a long time now. There are many discussions on the net about this and similar problems, but none of the solutions seems to work for me. I have a Debian server ...
13
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4answers
2k views

Windows DHCP Server - get notification when a non-AD joined device gets an IP address

SCENARIO To simplify this down to it's easiest example: I have a Windows 2008 R2 standard DC with the DHCP server role. It hands out IPs via various IPv4 scopes, no problem there. WHAT I'D LIKE I ...
2
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1answer
632 views

pfSense - DHCP Relay

I have 3 pfSense boxes acting as routers on a single subnet (172.22.12.0/26). Router A - 172.22.12.1 Router B - 172.22.12.17 Router C - 172.22.12.33 I want Router A to be the only DHCP server. ...
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1answer
1k views

Assign two static IP addresses to one mac address

Can Isc-dhcp-server give two static ip addresses to one mac address? I have several Genexis terminals in my network. Each terminal have two interfaces, one for public traffic and one for a management ...
0
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2answers
95 views

Controlling 2 DHCP servers in one network

In my customer network, we have 2 DHCP servers. One is fully controlled by me and another by a different vendor. I want to make sure a set of devices (my devices) when connected, should get IP address ...
0
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0answers
1k views

CentOS 6.4 - Cant get an IP from DHCP

I have a Ubuntu and CentOS system running on XenServer. The Ubuntu Box gets and IP from DHCP no problem. The CentOS will not take a DHCP but a static address works fine. [root@XenCentOS ~]# service ...