selelo wrote: ↑Sat Oct 12, 2019 11:40 pm
What is the advantage over layer 2 because with layer 2 the customer hide own routes from service provider
Sure, but the cost here is extending L2 over WAN. Which is never a good thing, given L2 has it's own problems - flooding, troubleshooting and (potential for) loops.
We're moving away slowly from extending L2 at all, and L2 islands should be ideally reduced to one host, or maybe even one container if that's virtualized environment. That way all you do stays at L3, and with L3 you have a lot of tools and visibility for the traffic - including tools to engineer paths for the traffic, load balance it and so on.