How routers connect to a three-tier switch

1, router to do a single arm routing, three layer switch for two-tier switch, only the VLAN, using routers for VLAN communication.

2, SVI:

The three-tier switch divides VLANs and configures virtual IP addresses for each VLAN to communicate data between the VLANs.

Add a VLAN, and configure the virtual IP address and the router's intranet interface address in the same network segment, and the router intranet interface to join the port to some of the VLAN.

It is important to note that a static route or dynamic route is connected to a router on a three-tier switch so that each VLAN is able to go out through the router, and a return route is routed to each VLAN on the router.

3, three layer switch configuration of each VLAN, and configure the virtual IP address, and enable a port does not belong to any VLAN IP routing function, that is, the interface for the three-tier routing function, and routers connected with the router intranet interface address with the same network segment IP address.

The three-tier switch is equipped with static routing or dynamic routing to route the addresses of the VLAN segments to the router so that each VLAN can be routed through the router to the extranet. A return route to each VLAN is also required on the router