We have two routers (Nexus 9k), router A and router B. Currently, we have one monitoring node connected to router A, and we're running an ERSPAN session from router B to router A to copy traffic of specific vlans (let's say vlan 100). Then router A sends that traffic to the monitoring node.
The thing is that we want to add a new monitoring node, but this time connected to router B. We want to create a new ERSPAN session, now from router A to router B, to copy traffic of the same vlans (vlan 100).
What I am wondering is whether or not that could create a loop ? i.e., router B receives traffic on vlan 100 and copies it to router A via its ERSPAN session. And then, after receiving this, router A notices that it's vlan 100 so it's going to also copy that traffic back to router B via the new ERSPAN session we configured. Is it possible ? Or would it only be the "true" vlan traffic entering the Nexus devices that get copied by the ERSPAN session ?
I made a quick drawing. Our goal is to create the red ERSPAN session (without bringing down the network).
