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GS2200-24 User’s Guide
247
CHAPTER 26
Loop Guard
26.1 Overview
This chapter shows you how to configure the Switch to guard against loops on the
edge of your network.
Loop guard allows you to configure the Switch to shut down a port if it detects that
packets sent out on that port loop back to the Switch. While you can use Spanning
Tree Protocol (STP) to prevent loops in the core of your network. STP cannot
prevent loops that occur on the edge of your network.
Figure 129 Loop Guard vs. STP
Refer to Section 26.1.2 on page 247 for more information.
26.1.1 What You Can Do
Use the Loop Guard screen (Section 26.2 on page 249) to enable loop guard on
the Switch and in specific ports.
26.1.2 What You Need to Know
Loop guard is designed to handle loop problems on the edge of your network. This
can occur when a port is connected to a Switch that is in a loop state. Loop state
occurs as a result of human error. It happens when two ports on a switch are
STP
Loop Guard