RSTP and PVST are two different protocols that can be used in a switched network. While they both achieve the same goal, they do so in different ways. In this article, we will take a look at the main differences between RSTP and PVST. We will also discuss when each protocol is most appropriate. By understanding the difference between RSTP and PVST, you can make the best decision for your network.
What is RSTP?
RSTP, or rapid spanning tree protocol, is a network protocol that helps to prevent loops in a network. It does this by sending out messages to switch ports to determine which ports are active and which are inactive. RSTP then creates a logical topology of the network, with active ports forming the “trunk” of the tree and inactive ports forming the “branches.” RSTP is similar to STP, or spanning tree protocol, but it is faster and more efficient. RSTP can be used in networks of all sizes, from small LANs to large WANs. RSTP is an important part of keeping a network running smoothly and preventing data loss.
What is PVST?
PVST stands for Per-VLAN Spanning Tree. PVST is a variant of the Spanning Tree Protocol (STP) that creates a separate spanning tree instance for each VLAN in the network. PVST+ is an enhanced version of PVST that supports advanced features such as load balancing and fast transition. PVST+ is compatible with STP, so it can be used in environments where STP is already deployed. PVST is typically used in enterprise networks, while PVST+ is often used in service provider networks. PVST and PVST+ are both standards-based protocols, so they are supported by a variety of vendors.
Difference between RSTP and PVST
RSTP and PVST are two types of Spanning Tree Protocols (STP). RSTP was introduced in 2001 with IEEE 802.1w. RSTP significantly reduces topology convergence time after a link failure.
- RSTP achieves faster convergence time by using the concept of point-to-point links and by introducing the role of alternate and backup ports. PVST is Cisco’s proprietary variation of STP. PVST+ is an enhanced version of PVST that provides compatibility between Pvst+ and RSTP domains. Both RSTP and PVST use the 802.1D STP algorithm, but RSTP has some modifications to the way it handles port states. RSTP converges faster than PVST because it uses a shorter timers & assumes that Point-to-Point links are present.
- Also, RSTP port roles are simpler than PVST port roles. In RSTP, there are three port roles: root port, designated port & blocks. Whereas in PVST, there are five port roles: root port, bridge port, designated port, alternate port & backup port .
- When a link goes down, RSTP will immediately block the redundant link without waiting for the max age timer to expire whereas PVST will wait for the max age timer to expire before blocking the redundant link . So overall RTP is faster than PVSP in terms of convergence time but PVSP+ provides compatibility between differentspanning-tree implementations.
Conclusion
Spanning tree protocol (STP) is a Layer 2 networking protocol that enables network administrators to configure a redundant, loop-free topology for their networks. There are two main types of STP: Rapid Spanning Tree Protocol (RSTP) and Per-VLAN Spanning Tree Protocol (PVST). In this article, we’ve looked at the key differences between RSTP and PVST. We hope you found it helpful!
