ZyXEL Communications XS-3900-48F, User Manual

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Chapter 11 Spanning Tree Protocol
XS3900-48F User’s Guide
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Note: This screen is only available after you activate RSTP on the Switch.
Figure 55
Advanced Application > Spanning Tree Protocol > Status: RSTP
The following table describes the labels in this screen.
Table 35
Advanced Application > Spanning Tree Protocol > Status: RSTP
LABEL DESCRIPTION
Configuration Click Configuration to specify which STP mode you want to activate. Click RSTP to edit
RSTP settings on the Switch.
Bridge Root refers to the base of the spanning tree (the root bridge). Our Bridge is this Switch.
This Switch may also be the root bridge.
Bridge ID This is the unique identifier for this bridge, consisting of the bridge priority plus the MAC
address. This ID is the same for Root and Our Bridge if the Switch is the root switch.
Hello Time
(second) This is the time interval (in seconds) at which the root switch transmits a configuration
message. The root bridge determines Hello Time, Max Age and Forwarding Delay.
Max Age (second) This is the maximum time (in seconds) a switch can wait without receiving a
configuration message before attempting to reconfigure.
Forwarding Delay
(second) This is the time (in seconds) the root switch will wait before changing states (that is,
listening to learning to forwarding). See
Section 11.1.3 on page 108 for information on
port states.
Note: The listening state does not exist in RSTP.
Cost to Bridge This is the path cost from the root port on this Switch to the root switch.
Port ID This is the priority and number of the port on the Switch through which this Switch must
communicate with the root of the Spanning Tree.
Topology Changed
Times This is the number of times the spanning tree has been reconfigured.
Time Since Last
Change This is the time since the spanning tree was last reconfigured.