Hey guys,
i'm currently trying to completely understand how the Cisco SDN-Solutions are implemented in an existing network, and i'm a bit confused by all the information online about this topics at Cisco. Maybe you guys can enlighten me.
So if i got that right, a cisco SDN-Solution, like SD-Access or ACI, implements an overlay-network on top of an existing underlay (Layer-3?) network. And in that overlay-network, many different services and protocols in all different logical layers can be implemented.
Are my assumptions correct so far?
And how is it prevented that this creates a bottleneck if all the implemented protocols and services in the overlay-network are limited to the specifications of the underlay-network? Like e.g. everything from the overlay-network still get encapsulated with IP-Protocol on Layer-3 in the underlay network?
please excuse my bad english and my may stupid questions, the more i research online, the more confused i am.
Thanks in advance and best regards
Sascha