Published at LXer:
When is a Switch Like a Router?
Port-based VLANs are specific to their switches, and cannot cross multiple switches. However, you can make a smart switch function like a router. Let's say that three ports are not enough for VLAN East; you want to connect more hosts. You could buy a bigger smart switch. Or you can uplink a second switch to one of VLAN East's ports, like this:
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