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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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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 settings. Can someone please tell me what this…
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Windows 7 does not respect the prefered router order from DHCP

We have been using Microsoft's DHCP server on our domain for years with success. One of the options we are pushing to the client is the default gateway. In the Scope Options dialog it reads: 003 Router Array of router addresses ordered by…
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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 use a well-known port: UDP port 67 for the DHCP…
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Adding static DNS entries on a dynamic BIND setup

I've got a DNS (BIND9) and DHCP (ISC-DHCP-SERVER) setup in which the DHCP server dynamically updates the DNS when hosts grab an IP address. I'm currently resubnetting a portion of my network that's not currently handled by DHCP and it's critical…
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Is it possible to receive dhcpdiscover from ff:ff:ff... mac address?

Today I saw this record in my log files: dhcpd: DHCPDISCOVER from ff:ff:ff:ff:ff:ff via vlan400: network 40.60.100.10/24: no free leases …
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IP served by OpenVPN doesn't take ipp.txt into account

I'm facing some troubles right now with an OpenVPN server an former colleague set up (I'm not too into it ATM). We're using OpenVPN for a private network of ~200 clients (to be more specific, only 15 clients, with VMs on them, bridged to the same…
Guillaume Fenollar
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how to fix "no free leases" issue in dhcp3?

I am facing no free leases issue. I am building a new server. I have successfully installed ltsp. Then, I configured the dhcp. This is my dhcpd.conf file. option subnet-mask 255.255.255.0; option broadcast-address 192.168.12.255; option routers…
sat
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Client not getting address from some DHCP server

I'm working on some embedded devices which should be connected to a large network (hundreds of devices) via ethernet and that should be configured using the DHCP protocol. What I'm experiencing is that apparently the devices get the address in some…
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Add static route through DHCP

I'm trying to get an OSX Lion Server to provide a static route to its clients (all OSX Lion) over DHCP. I can't get the client to actually apply the static route. So far, I've managed to get the DHCP server (BOOTPD) to actually serve the DHCP…
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Is there a way to classify DHCP requests based on the interface they're coming from?

As the question title states, I want to classify my clients based on the interface their requests are coming from. Can this be done with normal matching? Or should I restrict the DHCP server to only one interface and have dhcrelay listening on the…
kirbuchi
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DHCP: One NIC and multiple subnets

I'm setting up a Debian to work as a gateway for a small office network. I need to have three subnetworks for different areas within the company and I will define which PCs will get what IP based on their MAC addresses. My question is: is it…
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Use two DHCP servers in one LAN

How do I configure Windows XP to choose between one of as two DHCP servers in one (same) LAN?
unknown (google)
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Changing from Infinite lease time to 8 days

On our DHCP server, the lease time is currently set to infinite. I want to switch it over to 8 days, but from what i understand the clients do not do a DHCP renew if they have infinite lease. Will a machine do the whole DHCP handshake even if it…
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DHCP range starts with 194.77.30. Could that lead to problems?

Just noticed that our Lancom router has a DHCP range of 194.77.30.50 - 150. Could that lead to problems? Because sometimes some devices can’t be reached (with static IPS above that range like 194.77.30.170) and I have not yet figured it out why. I…
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DHCP failing to update DNS

We have a Windows Server 2003 SP2 machine that is a domain controller, DNS server, and DHCP server. (We realize that having all three roles running on the same computer is not the optimal configuration but there are no other machines available.)…
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