The network was fine yesterday and as far as I know nothing has been changed or added. This morning some computers are connected to our domain but most of them are reporting limited connectivity. On checking our DHCP server we are getting this message.
Cannot find the DHCP Server:
The DHCP server you specified cannot be located.
I took down my DHCP server to change some stuff, and after bringing it back up (down for 15 mins or so), I noticed that four other Ubuntu 12.04 servers set to use DHCP were unreachable. Running ifconfig on them returned just lo, so the eth0 and eth1 had been disabled.
I'm assuming the DHCP server missing caused them to shutdown the interface?
I know that there is an option for network-manager to get only the addres from DHCP but I think there's nothing for what you want.I'm not sure what you want to do. Do you have changing DNS servers and gateways?If you have control over the DHCP server you could do that by static DHCP (your pc gets the same address every time based on the MAC address).
i want to deploy a dhcp server capable of leasing ip on the basis of mac address.on each boot the system must take the same ip from dhcp serverhow to setup static ip from dhcp ser... [by abdulroshan]
My first post here.
Relevant info:
Host OS: Windows 7 Home Premium 64-bits with VMware Workstation 8
Two VMs: Ubuntu Server 12.04 and Ubuntu Desktop 12.04
VMware NAT settings:
Use local DHCP service is DISABLED
Subnet IP: 192.168.2.0
Subnet mask: 255.255.255.0
Gateway IP: 192.168.2.2
On Ubuntu Server I have a DHCP server: isc-dhcp-server
DHCP is working OK.
I had two virtual machine running under VirtualBox, both Windows Server 2008 R2.
One configured with DHCP and RRAS(NAT), another configured to be DNS.
The DHCP-NAT server has two virtual network cards, one NAT to have Internet access, another connected to internal network. I made the NAT one to have static IP, and the internal network one to get IP from DHCP.
A DHCP Server assigns IP addresses to client computers. This is very often used in enterprise networks to reduce configuration efforts. All IP addresses of all computers are stored in a database that resides on a server machine.
(...)Read the rest of How to install DHCP server in ubuntu 12.04 (Precise) Server (845 words)
© ruchi for Ubuntu Geek, 2012.
Given a LAN with default gateway of 10.5.1.1 and subnet of 255.255.0.0
The DHCP range is currently set in the range of 10.5.2.1 to 10.5.3.254
The 10.5.1.x range is reserved for static IP's.
I want to increase the DHCP pool ( the 10.5.2.x - 10.5.3.x range is too small )
Is this DHCP scope limited to the 2.x and 3.x range because of the 255.255.0.0 subnet?
Given a LAN with default gateway of 10.5.1.1 and subnet of 255.255.0.0
The DHCP range is currently set in the range of 10.5.2.1 to 10.5.3.254
The 10.5.1.x range is reserved for static IP's.
I want to increase the DHCP pool ( the 10.5.2.x - 10.5.3.x range is too small )
Is this DHCP scope limited to the 2.x and 3.x range because of the 255.255.0.0 subnet?
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