By default DHCP works via broadcasting on the local subnet and therefore is limited to being able to provide IP addresses for devices on its subnet only. In modern day networks this is a serious limitation as it would mean that for every subnet you would need a DHCP server – imagine the management overhead!
So how can we configure a DHCP server in one subnet to respond and provide IP addresses to clients in multiple other subnets? The answer is to use a DHCP Relay Agent.
The following article explains how to configure a DHCP relay agent for a Cisco SG300 Layer 3 managed switch.
Recently I upgraded my home test lab with a new ESXi white box host. This host is a custom built PC that runs an Asus Gryphon Z97 micro-ATX motherboard. A few people have asked me how I got ESXi 5.5 running on the Asus Gryphon Z97, so I thought I would post up how I did it here….
By default, all domain-joined servers and workstations synchronise their time with the PDC Emulator Domain Controller. However how do you configure Windows Time synchronisation for the PDC Emulator and for non-domain joined machines?
This article explains how to configure Windows Time to synchronise an external time source (NTP server), whether that be internal to your network or an internet NTP server.