Question About InterVLAN Routing
shimabuku
Member Posts: 13 ■□□□□□□□□□
in CCNA & CCENT
By looking at the diagram in the link, Configuring InterVLAN Routing with Catalyst 3750/3560/3550 Series Switches - Cisco Systems
Would the router have subinterfaces on Fa0/0 for each VLAN? Or is the layer 3 switch taking care of it? Is it safe to say that the router is running some kind of routing protocol so traffic is able to reach the internet?
Would the router have subinterfaces on Fa0/0 for each VLAN? Or is the layer 3 switch taking care of it? Is it safe to say that the router is running some kind of routing protocol so traffic is able to reach the internet?
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FrankGuthrie
Member Posts: 245
If you configure the Layer 3 switch, also called an Multi Layer Switch (MLS), with the #ip routing command, then routing between the VLAN's is done by the switch and you don't need sub-interfaces on the router, as the traffic is passed as Layer 3 to the Router.
If you don't configure the Layer 3 Switch with the #ip routing command, which basically makes the switch a Layer 2 switch, you do need to create sub-interfaces on the Router.