Chapter 11 Bridge

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.

Table 24 STP Port States

PORT

DESCRIPTION

STATE

 

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.

11.2 The Bridge Configuration Screen

Click Configuration > Bridge Menu > Bridge Config to open the following screen.

Figure 36 Configuration > Bridge Menu > Bridge Config

MES-2110 User’s Guide

91

Page 91
Image 91
ZyXEL Communications MES-2110 manual Bridge Configuration Screen, STP Port States, Port Description State, Forwarded