IP Connectivity Intermediate ~7 min

Inter-VLAN routing with SVIs

Layer-3 switch SW1. Turn on IP routing, create VLAN 10 and VLAN 20, then bring up an SVI for each: Vlan10 = 10.10.10.1/24 and Vlan20 = 10.20.20.1/24. That gives hosts in either VLAN a default gateway on the switch itself.

Topology

SW1 (L3)

Objectives

○ip routing enabled
○VLAN 10 exists
○VLAN 20 exists
○SVI Vlan10 up with 10.10.10.1/24
○SVI Vlan20 up with 10.20.20.1/24

Hints

Hint 1 — SVI ≠ physical port

The command interface vlan 10 creates a virtual L3 interface bound to VLAN 10. It's the gateway that hosts in VLAN 10 point to.

Hint 2 — full sequence

enable
configure terminal
 ip routing
 vlan 10
  exit
 vlan 20
  exit
 interface vlan 10
  ip address 10.10.10.1 255.255.255.0
  no shutdown
  exit
 interface vlan 20
  ip address 10.20.20.1 255.255.255.0
  no shutdown
  end

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IP Connectivity · ~5 min

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