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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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Migrate AD DHCP

Soon, I will need to migrate my domain controller server with AD DHCP 2012 R2 from a PowerEdge R430 to a virtual machine on Windows server 2016 based on VMware vSphere 6. Can anybody post a step-by-step procedure or indicate if there will be any…
Andre
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Do the DHCP scopes of subnets need to be unique

I am investigating connectivity issues in a network setup with 4 routers - A1, B2, B3, and B4. A1 is the modem/router that connects to the internet at large. It is using pretty much the default settings WAN IP: (assigned by ISP) LAN IP: …
Enrico
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Static IP after reboot conflict with repository : [Errno 256] No more mirrors to try

I install CentOS-7-x86_64-Minimal-1611 on vmware. In the first part, after enabled dhclient I can install and download using commands but I set static IP to avoid to use dhclient command every after reboot. But after reboot commands like yum install…
user332153
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TFTP Server for multiple vlans

I have a linux dhcp/tftp server with multiple vlans serving a CMTS. The gist of it is in the CMTS, I tell the cable modems on what vlan I want them to get their address and configuration file from. The tftp server address is 192.168.130.2 and the…
Mauricio Perez
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DHCP and infrastructure

I'm currently deploying domain controllers in my company network, and I would love to have my own DHCP server within my network. The problem is that a another company in the building is controlling the router, which is running a DHCP service. All…
Frisbee
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Search domains in Debian 8 with systemd-resolved

I'm running Debian 8 + systemd215. I'm trying to setup domain suffix to be appended automatically, when I ping other hosts in LAN. Before systemd I'd just add below line to: #/etc/resolv.conf search sub2.sub1.mydomain But now on modern system…
deklin
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CISCO DHCP Relay and Server

I want to setup a cisco router to be a DHCP relay but i want to answer dhcp requests locally if the DHCP Relay request won't answer. In the other word, I want to setup a dhcp relay with fail safe(Which assign ip from its own DHCP pool)
Ali
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408 errors from apache, "fork: cannot allocate memory" from dhclient and sshd

For the last three nights in a row, I've had an EC2 server start to give 408 errors in response to web requests. When I come in in the morning, I can't ssh in; I have to reboot using the management console. Both dhclient and sshd are giving error…
philh
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Debian IPv6 DHCP not working when rebooting

For some reason I won't get an IPv6 address when rebooting my Debian 8 System, while I get one when restarting the networking service. The DHCPv6 server is up and running (and is answering when using dhclient or restarting the networking…
CalibeR.50
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Centos 7 tagged vlan dhcp client

I'm trying to set up a tagged vlan interface to work with DHCP and I want to make sure I have the client config set correctly. I have ifcfg-ens32 set as: DEVICE=ens32 TYPE=Ethernet ONBOOT=yes BOOTPROTO=none and I have ifcfg-ens32.15 set…
Keef Baker
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Networking Issue with DHCP and Vlans

We've had this issue for a while now and im at my whits end. Bit of background, we have a simple setup, we have a main vlan for the office, then a few seperate ones for development, testing and support. Two windows server 2012 DC's running…
Russell
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Secure Dynamic DNS and DHCP Quandry

Looking for some input on a best practices approach. Currently have an AD domain w/ secure dynamic DNS updates disabled (e.g. any client can update a DNS record). Would like to move away from this. 50+ remote sites (connected w/ MPLS and each has…
rayvd
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dnsmasq does not resolve local adresses

I am setting up a dnsmasq server at the moment with the capabiltity of acting as a DHCP server. Ive done a basic setup yet. My goal was to have a DHCP Server here that also resolves names and makes them pingable. DHCP works just fine, I get the…
Nidhoegger
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Should the Default Gateway be Firewall or DHCP/DNS server on Windows Domain Client PC

This is a bit of a theorteical question but it determines how I set up. On a Client computer within a Windows network should the "Default Gateway" be set to the Firewall or the DHCP server (which would then direct it to the Firewall)?
tim.baker
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How to find out ip address of new virtual machine using libvirt 0.10.0+ (routed network)

My goal is to find out ip address of new virtual machine by using libvirt api only (>=0.10). Currently I am using libvirt's net-update command: before start a new machine I set static dhcp entry for it and vm booting with known address. It works…
kubus
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