I have inherited a network and I don’t understand why the VLAN’s are setup this way.
I have 6 cisco switches with a single Internet gateway. My clients are all on the VLAN 1 with an IP of 10.60.15.x/18. Their gateway is set to be 10.60.48.254. My gateway has an internal IP of 10.60.48.254/24 but on VLAN100 (note the different subnet mask). The core switch connected to the gateway has VLAN IP’s of 10.60.15.253/18 and 10.60.15.254/24 so that all Internet traffic is switched through this core switch.
Is there an advantage to having my Internet Gateway on a separate VLAN? I’ve never seen this before. Is the setup advanced or just overly complex?