DHCP for several local area networks VIRTUAL via SG200 - 50 p

Here's my scenario.  One of my clients is an executive suite.  Each office gets its own internet through a separate router.  It is a big mess of wiring and confusion.  I want to simplify this by using a single router that feeds a single DHCP subnet to a confgured to switch SG200 - 50 p with multiple VIRTUAL LANs. I was able to do this by connecting an ethernet cable from the router to each group VLAN ports.  So VLAN1 has 4 ports, the first is connected to the router.  VLAN2 has 4 ports, the first is connected to the router etc.    Each VLAN is done with success of DHCP, I isolate traffic between the VLANS.  There is no cross = ping between the VLAN, which is what I want.  And each VLAN can access resources within its VIRTUAL LAN and also provides access to the internet.  Bravo HOWEVER, I would like to provide DHCP to all them VLAN on a single switch port, rather you use a router to power for each grouping of VIRTUAL LAN port.  Because my router is limited to 4 ports, I am limited to 4 VLANS.  I need 12.   I guess this is accomplished in trunking all the VLAN of the to a single port.  But I failed to achieve.  Any ideas are much appreciated.

Hi Andy, it depends on what one of your routers support. The switch supports 802. 1 q. One of your routers must support a trunk or subinterfaces with 802. 1 q capabilities. It is very important for more than just DHCP. Since I use a single wire, all the VLAN except the vlan native will not have access to the internet unless the router can understand tags vlan.

My advice to you is first to identify the capacity of your routers, know which router you have / want that supports 12 VLAN and 802. 1 q. The configuration should be the easy part.

-Tom
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