From the course: CCNP Switching (300-115) Cert Prep: 1 Layer 2 Technologies
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Rapid STP - Cisco Switches Tutorial
From the course: CCNP Switching (300-115) Cert Prep: 1 Layer 2 Technologies
Rapid STP
- [Instructor] While STP's original specification, 802.1D, did a decent job of preventing loops in the early days, it was slow, and painfully so. There are a few flavors that enhanced and replaced the original. 802.1W, or Rapid Spanning Tree Protocol, was built off of 802.1D, but it converges faster than the previous 30 seconds it would normally take. RSTP introduces both new port roles and states. For review, the old 802.1D standard had roles of root port, designated port, and blocking port. STP roles are as follows: Root port and designated port are the same as they were in 802.1D. And alternate port is one that is a less desirable root port, and recall that the root port is the one that heads towards the root bridge. The last new role is a backup port. This is a less desirable designated port, which means it's a port connecting to another switch heading away from the root bridge. Speaking of the root bridge, Rapid Spanning Tree Protocol elects the root bridge in the same fashion as…