NetAtlas Enterprise Ethernet Switch Manager User’s Guide
53
Chapter 5 View
Once a stable network topology has been established, all bridges listen for Hello BPDUs
(Bridge Protocol Data Units) transmitted from the root bridge. If a bridge does not get a Hello
BPDU after a predefined interval (Max Age), the bridge assumes that the link to the root
bridge is down. This bridge then initiates negotiations with other bridges to reconfigure the
network to re-establish a valid network topology.
5.2.3 STP Port States
STP assigns five port states (see next table) to eliminate packet looping. A bridge port is not
allowed to go directly from blocking state to forwarding state so as to eliminate transient
loops.
5.2.4 STP Status
View current STP information in the
STP Status
screen. Click
Status
>
STP Status
and select
a switch from the device list located on the left-hand side of the screen. The STP status
displays in the table on the right.
Figure 22
View: STP Status
The following table describes the labels in this screen.
Table 18
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.
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.
Summary of Contents for NETATLAS ENTERPRISE -
Page 1: ...NetAtlas Enterprise Ethernet Switch Manager User s Guide Version 1 02 1 2006 ...
Page 21: ...NetAtlas Enterprise Ethernet Switch Manager User s Guide 21 List of Tables ...
Page 27: ...NetAtlas Enterprise Ethernet Switch Manager User s Guide 27 Chapter 1 Introduction ...
Page 35: ...NetAtlas Enterprise Ethernet Switch Manager User s Guide 35 Chapter 2 Switch Manager ...
Page 45: ...NetAtlas Enterprise Ethernet Switch Manager User s Guide 45 Chapter 3 EMS Main Window ...
Page 67: ...NetAtlas Enterprise Ethernet Switch Manager User s Guide 67 Chapter 5 View ...
Page 91: ...NetAtlas Enterprise Ethernet Switch Manager User s Guide 91 Chapter 9 Fault ...
Page 99: ...NetAtlas Enterprise Ethernet Switch Manager User s Guide 99 Chapter 10 Maintenance ...
Page 103: ...NetAtlas Enterprise Ethernet Switch Manager User s Guide 103 Chapter 11 Tools ...
Page 109: ...NetAtlas Enterprise Ethernet Switch Manager User s Guide 109 Chapter 12 Device Menu Overview ...
Page 119: ...NetAtlas Enterprise Ethernet Switch Manager User s Guide 119 Chapter 13 System Configuration ...
Page 133: ...NetAtlas Enterprise Ethernet Switch Manager User s Guide 133 Chapter 14 Switch Configuration ...
Page 191: ...NetAtlas Enterprise Ethernet Switch Manager User s Guide 191 Appendix A SNMPc Network Manager ...
Page 193: ...NetAtlas Enterprise Ethernet Switch Manager User s Guide 193 Appendix B ...