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A "philosophical question" about aNet

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Created: Feb-19-2025 14:11

Summary:

Official documentation says:- VMs that run on the same node communicate via an internal bridge- Different node VMs communicate via overlay interface when connected to vSwitch- Does not go to Physical ...

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Marco Barbieri Posted Feb-11-2026 21:33
Hi all, I enter this thread because I see a lot of confusion on OVERLAY network.

NONE of the previously showed enviroment will use network overlay, all of the packet will flow througth the Port Group and the edge directly.
There is no reason to encapsulate a tcp packet when it has the capability to reach the destination without usage of overlay network.

Overlay network will intervene for example if you place a virtual router or a virtual firewall in the middle, between the virtual Switch and the Edge/trunk
Newbie437257 Posted Mar-26-2025 12:00
If you connect both VMs directly to the Edge, traffic will be routed via the Edge network, which could introduce more hops and potential latency.
Football Bros
AR Posted Feb-20-2025 12:23
Hello,
As you can see from the figure on the left, these virtual machines use the edge network for all of their traffic. Since both virtual machines are on the same virtual switch, traffic between them in the right diagram goes to the overlay network. In the event that two virtual machines are located on separate virtual switches, the traffic between them is handled via the edge interface.

Enrico Vanzetto Posted Feb-19-2025 15:49
Hi,
in the left diagram, these VMs use the edge network even for the traffic among them. In the right diagram, the traffic between virtual machines goes to the overlay network as both virtual machines are on the same virtual switch. If you have a scenario with two virtual machines on different virtual switches, the edge interface is used for the traffic between them.