C
HAPTER
1
| Introduction
Overview
– 12 –
L
OOPBACK
D
ETECTION
AND
P
REVENTION
When a loop occurs at a port, the switch will
■
Block the loop port, automatically protecting the switch.
■
Flash the port LED twice every second.
■
Turn the Loop LED on red.
When the loop clears the port LED will cease flashing and the Loop LED will turn
off.
Figure 3: Loopback Detection and Prevention
IGMP S
NOOPING
V
1/
V
2
The switches support IGMP snooping v1/v2, improving multicast services such
as video streaming, resulting in smoother video reproduction.
