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Questions tagged [dhcp]

The Dynamic Host Configuration Protocol (DHCP) is a network configuration protocol that assigns IP addresses and gateway configuration automatically.

The Dynamic Host Configuration Protocol (DHCP) is a network configuration protocol for hosts on Internet Protocol (IP) networks. Computers that are connected to IP networks must be configured before they can communicate with other hosts. The most essential information needed is an IP address, and a default route and routing prefix. DHCP eliminates the manual task by a network administrator. It also provides a central database of devices that are connected to the network and eliminates duplicate resource assignments.

Excerpted from Wikipedia.

1054 questions
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How can I find out my system's DHCPv6 DUID?

I would like to assign a static IPv6 address to my machine running Ubuntu Server 15 using DHCPv6. To do so, I need to know the DUID used by the DHCP client so I can assign the static IP to it in my network's DHCP server. How can I find out which…
ThiefMaster
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How to define default gateway with multiple DHCP interfaces?

How does ifconfig determine which network interface to use as the default when DHCP assigns a default route for each NIC? It seems like it's in a race-condition and I need to have a more reliable solution. Is there a setting in…
DrumEater
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How to monitor DHCP leased ip address

I have Ubuntu server 12.10 as DRBL and CloneZilla. How can I find out how many IP addresses have been assigned to the clients. How do I control/monitor the DHCP daemon service(stop/start/status)?
Kevin Liao
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What is the difference between dhcp3-server and isc-dhcp-server packages?

What is the difference between dhcp3-server and isc-dhcp-server packages in ubuntu 12.04?
user61928
3
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2 answers

Can't connect to internet after starting DHCP

I install isc-dhcp-server to connect with my Parallella board via ethernet cable, and I'm using internet via wifi. However, after starting DHCP server, I can't connect to the internet. I checked the syslog and there seems to be conflict between eth0…
sean
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Forwarding data between two interfaces

I installed Ubuntu server 12.04 after that I installed dhcp3-server and configured it like this: At isc-dhcp-server INTERFACES="eth0" And in dhcpd.conf # A slightly different configuration for an internal subnet. subnet 192.168.1.0 netmask…
user84471
  • 399
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How to automatically renew DHCP IP?

I have a headless server on my network (actually it's just running Ubuntu Desktop 10.04) that for some reason isn't automatically renewing its DHCP lease when it gets reconnected to the network. How do I fix this? Some more info: the router our…
xyzzyrz
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ISC has announced the end of life for ISC DHCP as of the end of 2022. Will ubuntu use kea DHCP instead of ISC DHCP as they suggest?

for more information about DHCP EOL: https://www.isc.org/blogs/isc-dhcp-eol/
mingshuai ren
  • 31
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DHCP-DHCP Relay Agent

I am using the Ubuntu 18.04. For the seek of an enterprise client i would like to use my server as a DHCP server and as a DHCP Relay Agent. I am not sure if this is a possible solution. I know that this is feasible with Cisco technology and with…
Kostas
  • 31
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Where is isc-dhcp-server configuration files in Ubuntu 14.04?

On Ubuntu 14.04 LTS I can not find the path to isc-dhcp-server as it is mentioned in several areas as in this (for Ubuntu 12.04). It is installed on my machine, but I want to access its configuration files that I can not see. Where can I find it ?
user284234
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ubuntu 20.04 does not renew dhcp lease

All of a sudden my Ubuntu 20.04 stopped renewing dhcp leases. My ethernet card has been assigned a fixed IP, but it needs to renew the lease every 12 hours. It does not. I need to unplug and re-plug the ethernet cable to be back on-line. I have…
Antonio Sesto
  • 173
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How can I boot the dhcp server for my internal network board?

I configured the dhcp server and now I want it to boot for the internal network board. Any idea how to do this?
Larisa Fersigan
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Linux DHCP server with multiple gateway

In the following diagram, I have two routers between LAN A and B, and several hosts on LAN A that should have connectivity to LAN B. My goal is to have half my hosts using R1, and the other half using R2. To do that, I thought about using a DHCP…
Nakrule
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Problem obtaining IP address when connecting to Linksys E4200 with DHCP Reservation established

I am having difficulty acquiring an IP address when running off my Ubuntu partition and attempting to connect to the Cisco Linksys E4200 wireless router via wireless which is using DHCP reservation for assigning "static" IP addresses based on the…
Terrance Curry
  • 21
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dhcpd.log problem

I stupidly deleted /var/log/dhcpd.log So, I stopped the service, created a new dhcpd.log file with the same ownership / rights etc. as the old file, and restarted the service. But nothing is being written to the log file now. Am I missing something?
Simon
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