Hi all, I am having a bit of a mental blank here.
If two PCs on a switch are in two separate VLANs (and the switch is connected to a router) and one of the PCs sends a layer 3 broadcast, who gets the broadcast?
- All of the PCs on the switch regardless of which VLAN they are in, but the broadcast does not go past the router?
- All of the PCs in that VLAN (including PCs past the router)?
- All PCs in that VLAN before the router?
- None of the above??
Layer 3 switch is nothing but a router. Therefore, you guessed is correct it doesn't forward broadcasts. Of course, we talking about VLAN (layer 3) interfaces only and the switch (layer2) itself forwards broadcast between the switchports as any other layer 2 switch.
To make a router forward broadcasts between two interfaces you need to configure the two interfaces to bridge traffic between them. The router would simply forward the broadcast out the interfaces that are part of the same bridge group. It doesn't convert the broadcast into any other form with this setup.