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C
ONFIGURING
THE
S
WITCH
3-114
When using STP or RSTP, it may be difficult to maintain a stable path
between all VLAN members. Frequent changes in the tree structure can
easily isolate some of the group members.
Displaying Global Settings
You can display a summary of the current bridge STA information that
applies to the entire switch using the STA Information screen.
Field Attributes
•
Spanning Tree
State
– Shows if the switch is enabled to participate
in an STA-compliant network.
•
Bridge ID
– A unique identifier for this bridge, consisting of the
bridge priority and MAC address (where the address is taken from the
switch system).
•
Max Age
– The maximum time (in seconds) a device can wait without
receiving a configuration message before attempting to reconfigure.
All device ports (except for designated ports) should receive
configuration messages at regular intervals. Any port that ages out STA
information (provided in the last configuration message) becomes the
designated port for the attached LAN. If it is a root port, a new root
port is selected from among the device ports attached to the network.
(References to “ports” in this section mean “interfaces,” which
includes both ports and trunks.)
•
Hello Time
– Interval (in seconds) at which the root device transmits
a configuration message.
•
Forward Delay
– The maximum time (in seconds) the root device will
wait before changing states (i.e., discarding to learning to forwarding).
This delay is required because every device must receive information
about topology changes before it starts to forward frames. In addition,
each port needs time to listen for conflicting information that would
make it return to a discarding state; otherwise, temporary data loops
might result.
Summary of Contents for TigerSwitch 1000
Page 2: ......
Page 19: ...CONTENTS xv...
Page 23: ...TABLES xix...
Page 36: ...INTRODUCTION 1 10...
Page 155: ...PORT CONFIGURATION 3 107 Figure 3 50 Displaying Etherlike and RMON Statistics...
Page 222: ...CONFIGURING THE SWITCH 3 174...
Page 417: ...VLAN COMMANDS 4 195 This section describes commands used to configure private VLANs...
Page 466: ...TROUBLESHOOTING B 4...
Page 479: ......