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Questions tagged [dhcp-server]

Dynamic Host Configuration Protocol (DHCP)

The DHCP service is a client/server application that allows "clients" to obtain configuration information (typically for network settings) from a "server".

Questions carrying this tag should focus on the server-side more than the client-side.

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Unable to add two scopes?

I am trying to add two scopes of different range say (192.168.0.5-192.168.0.10), (192.168.0.15-192.168.0.25) on windows DHCP server while I am trying to add the second scope it says the address range and mask conflicts with the existing scope is…
vincity _sportia_taymodaimo
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DHCP not sharing Internet access

I have several Virtual Machines in Vmware ESXi 6.5 with 2 Network Groups. Created a DHCP Server Machine on CentOs with 2 networks interface. 1 / vm network from which it takes a network and has IP assigned. 2 / to the internet network in which all…
Slideroh
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Weird answer of linux DHCP server to gratitious ARP causes DHCP failure

This is a problem, that I ran into recently on a quite heavily configured linux server. This machine runs Samba as an Active Directory Domain Controller, a mail server, a web server, two virtual machines (using KVM/QEMU, and connecting one of their…
Kai Petzke
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Are static IP's supposed to show up in DHCP.leases list?

I messed with the dhcp.leases file (removed, and remade it) hoping it would force the IP's to repopulate. That was a mistake.. I think I have fixed it by reinstalling though. Anyway, I setup static IP's for the servers via the dhcp.config file, I…
Darius
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Have a script receive an IP from the DHCP server?

None of the Nagios DHCP check plugins can actually take an IP from the DHCP server as a real test. All they do is ask which IP it would give to a certain mac address. Our DHCP server failed, where Nagios didn't alert, because it could pass the…
Louise Hoffman
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DNS issue when communicating with Windows Server 2012 R2

I have upgraded my Windows Server 2008 R2 to a new Windows Server 2012 R2 and installed AD DS, but when to trying to join other PCs to the domain it gives the following error: The specified domain does not exist or could not be contacted. Domain…
Karim M.Z.
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ISC DHCP (Infoblox) takes 30+ seconds to respond to DISCOVERS

Client's DISCOVER packets reach the Infoblox DHCP server through DHCP relays, but Infoblox doesn't seem to be responding. I checked the pcap taken from the DHCP server, I can see there is 3 DISCOVERS from the Client (via Relay), Infoblox DHCP…
Vignesh SP
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DHCP server is saying 'host unknown' before sending DHCPOFFER

I am trying to PXE boot a machine. In the system log, I can see: dhcpd[28030]: DHCPDISCOVER from 98:90:96:bc:fc:e3 via 10.65.240.2 dhcpd[28030]: none: host unknown. dhcpd[28030]: DHCPOFFER on 10.65.240.111 to 98:90:96:bc:fc:e3 via 10.65.240.2 I…
shearn89
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DHCP server is not selecting IPs inside of the specified range

I have my DHCP server which I specificaly set the ip range to be between: 10.53.70.100 -- 10.53.70.200 but there are sometimes I get IPs outside from this range. For example, the last server I created got the IP 10.53.70.245, so I just wanted to…
VaTo
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pxe and dhcp on dfferent subnets

Good Day Please help , i have a dhcp on 192.168.21.0/24 and pxe server on 192.168.1.0/24. Now i want to install hosts in 192.168.21.0/24 using this pxe tftp netboot on 192.168.1.0/24. My hosts in 192.168.21.0/24 are getting IP fine then trying tftp…
Tofara Machemedze
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Does "broadcast-address" needs to be within defined subnet in dhcpd.conf?

Ideally, broadcast address should be last address of defined subnet.But I don't see dhcp server enforces such restriction.A brodcast-address defined outside subnet in dhcpd.conf is accepted by dhcp server? e.g. below configuration for…
user2589882
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dhcp 'next-server' outside broadcast domain, without using ip helpers(aka dhcp relay)

Can you set a 'next-server' option in dhcp that is outside of the client's broadcast domain? I'm trying to pxe-boot from a server outside my client's network, using isc-dhcpd In my lab I see the next-server option get sent from the dhcp server to…
Party Time
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How can I set the Ethernet infrace classid through Powershell?

Hey guys I wonder if it's possible to set classid on Ethernet interface via Powershell? I tried that on server 2k12 R2 via ifconfig but I get no results.
nethero
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DHCP client not getting IPv4 address from a DHCP server

I configured a DHCP server on a VM in VirtualBox. This machine has 2 network adapters, enp0s3 - NAT (from where I have my network connection) and enp0s8 - Internal Network (intnet). DHCP server is listening on enp0s8 interface. Configurations: …
Alex V
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how dhcpd handles static IPs vs DHCP reservations

We have a RHEL 6.7 server for DHCP. I am needing some clarification on how dhcpd handles network addressing when someone wants a permanent IP address. Here is a sample config from one of our servers. My understanding is there are 2 ways to get them.…
user53029
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