If you have layer 2 managed switches which have VLAN's on them, do you still need a layer 3 switch/router?

  • 1
    A layer-2 switch cannot send traffic between VLANs. You need a router for that, and a layer-3 switch has a router module in it, so that will work, too.
    – Ron Maupin
    Jul 9, 2020 at 17:28

2 Answers 2


Each VLAN is a separate data link layer segment - nodes in different segments cannot talk to each other. In order to enable communication between them, a router/gateway/layer-3 switch is required.

  • So what's the difference between a layer 2 managed switch and a layer 2 unmanaged switch?
    – The_Bear
    Jul 9, 2020 at 17:19
  • Check out this question.
    – Zac67
    Jul 9, 2020 at 17:22

Vlan is logical segmentation of network

As you said layer2 switch and having vlan configured on them . By default different vlan won't communicate to each other to enable communication between different vlan . We need to have router or layer 3 switch . Inter vlan routing is used in router to enable communication between different vlan as same as in layer3 switch also....

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