We have a network wide refresh coming up, and I keep reading that the L2 demarc should be as close to the access layer as possible. This makes sense, there are multiple benefits like convergence, eliminating STP and other L2 chatter, etc. However, I'm having a hard time understanding a few things.
- How are people connecting ESXi hosts, do vSwitches support L3?
- We have a few VLANs that span across multiple floors of our building. Would this need to be redesigned so only one route for a network always has same next hop? Or can we create two routes to same destination with multiple next hops in some fashion?
- Does L3 at the access layer assume VLANs are unique to each closet? Ex, that access switch is the sole next hop for whatever network exists in that closet.
- We use a collapsed core design for the floor where our Core switch resides. For other floors, the core connects to distribution switches. Does this wipe out the possibility of going L3?
- We use VLANs that are non-routed except by the firewall for certain things like guest network and an isolated network. These networks need no access to anything internal, so the Core simply sees them in L2 and passes them to the firewall. Like above, does this topology rule out the possibility of L3?
Appreciate any input.
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