In this video we look at what you might see in a daily ticket in the networking queue. The ticket requires we make network changes to install a new server on the network, with new vlan creation. I started from the physical connection to the “new” ESX server, and walked through configuring a layer two port-channel/etherchannel/channel-group which are all essentially the same thing (don’t even get me started on my rant about Cisco and their terminology sometimes).

After the server was connected, the next step is the layer 2 and layer 3 VLAN creation for the new server VLAN.  The difference between layer 2 and layer 3 VLAN’s in summary is the layer 3 is treated as an interface where you can assign an IP address (a gateway for a subnet, essentially). Whereas layer 2 is simply a number and logical seperation of traffic assigned to that vlan on their ports. The two work side by side whereas the other solution to a layer 2 vlan’s gateway could be a sub interface with a dot1q association to match that vlan on a far-side trunk, perhaps to a router.

With VLAN’s configured and the trunks identified as functioning, this ticket is resolved and we can refill our coffee.