ZyXEL Communications MES-2110 - Manual (Page 91)

Chapter 11 Bridge
MES-2110 User’s Guide
91
11.1.3 STP Port States
STP assigns five port states to eliminate frame looping. A bridge port is not
allowed to go directly from blocking state to forwarding state so as to eliminate
transient loops.
11.2 The Bridge Configuration Screen
Click Configuration > Bridge Menu > Bridge Config to open the following
screen.
Figure 36 Configuration > Bridge Menu > Bridge Config
Table 24 STP Port States
PORT
STATE
DESCRIPTION
Disabled STP is disabled (default).
Blocking Only configuration and management BPDUs are received and processed.
Listening All BPDUs are received and processed.
Note: The listening state does not exist in RSTP.
Learning All BPDUs are received and processed. Information frames are submitted
to the learning process but not forwarded.
Forwarding All BPDUs are received and processed. All information frames are received
and forwarded.