O'Reilly logo

CCNA Quick Reference Sheets (CCNA Exam 640-802) by Jim Doherty, Eric Rivard

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 2. Redundant Switching and STP

Redundant Switched Topology Issues

A redundant topology has multiple connections to switches or other devices. Redundancy ensures that a single point of failure does not cause the entire switched network to fail. In the absence of the Spanning Tree Protocol (STP), Layer 2 redundancy can cause problems in a network, including broadcast storms, multiple copies of frames, multiple loops, and MAC address table instability. Figure 2-1 shows a redundant topology.

Redundant Switched Topology

Figure 2-1. Redundant Switched Topology

Broadcast Storms

The flooding of broadcast frames can cause a broadcast storm (indefinite flooding of frames) unless ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required