Thursday, September 30, 2021

Two switches/routers "sharing" routing tables?

Noob/terminology question!

If I have a managed switch with two vlans, I understand that all traffic between the two vlans must go through a router. I was wondering if there are switch / routers that can share routing tables (say every millisecond) so that traffic that's local to switch (between two different vlans) doesn't have to go to the router and can be handled by switch alone.

I am sure something like this must exist: what is such a sharing protocol/mechanism called? Or is this part of what they call "software defined networks"?



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