Unit 1: Network Infrastructure
This will allow you to demonstrate your networking skills, knowledge, and abilities, with a focus on enterprise-level switching, routing, and multicast components that support cross-platform (inter)operability and integration with the most recent software-defined technologies.
When a new switch is plugged into a current switching infrastructure, topology events may happen. There is a Proposal/Agreement method that RSTP uses on point-to-point links to quickly forward the port without stopping services or making a loop.
The Proposal says that a port wants to become a Designated Forwarding, and the Agreement says that the port can start forwarding right away.
When a new point-to-point link is added between two switches, both ports come up as Designated Discarding, which is the default state. When a port is in the Discarding or Learning state, it sends a BPDU with the Proposal bit set. If they are authorized to be Designated, both switches will do this.
If it turns out that the BPDU received on the port meant for discarding is the superior one, its role will change from Designated to Root discarding. During the process, port roles will also be changed.
If a switch gets a BPDU with a proposal bit set on its Root port, it puts all of its non-edge ports into a discarding state, this process is known as Sync. When a switch is in the Sync state, it is cut off from the network and loops can’t go through it.
