Spanning Tree Protocol (STP)


Spanning Tree Protocol (STP)

STP Overview

In Layer 2 domain, redundancy is an important case. To provide redundant links, multiple connections are done between switches. But this redundancy mechanism can cause an undesirable situation that is called “L2 Loop”. To provide L2 redundancy and to avoid L2 loops, Spanning Tree Protocol (STP) has been developed.

During the development period, various versions of STP has been introduced. Different standards has been created beside Cisco specific versions. These STP versions are :

STP (Spanning Tree Protocol) – 802.1D
RSTP (Rapid Spanning Tree Protocol) – 802.1W
PVST+ (Per VLAN Spanning Tree Plus) – Cisco Proprietary
Rapid PVST+ (Rapid Per VLAN Spanning Tree Plus) – Cisco Proprietary
MST (Multiple Spanning Tree) – 802.1s

In this article, mainly we will focus on STP (802.1D).

Redundant Layer 2 Problems

Redundancy is an important term for a network. Layer 2 Redundancy is also important but need more caution. Without a mechanims like STP, Layer 2 Redundancy mechanisms can cause the below problems:

• Layer 2 Loops and Broadcast Storms
• MAC Address Instability
• Duplicate Frame Transmission

Let’s talk about each of these Layer 2 Redundacy problems.

We're Sorry!
Full Access is for only IPCisco Crew...
With IPCisco Membership, You Can Access:
• All Certification Courses (Cisco, Juniper, Nokia and Huawei),
• Thousands of Questions (Lesson Quizes and Special Quiz Section),
• Carieer Consultancy, CV/Resume Check, Career Advice Meeting,
• Cheat Sheets, Job Interview Trainings, Network Tools,
You will be Member of a Big IPCisco Community,
You will Learn Network Lessons with Always,
New And Different Learning Styles!
We are waiting for you!

Lesson tags: STP, Spanning Tree
Back to: JNCIS > Spanning Tree

Comments are closed.