ZyXEL Communications MES3500 Series, User Manual

Page: 124 / 370

Chapter 13 Spanning Tree Protocol
MES3500 Series User’s Guide
124
13.5 Rapid Spanning Tree Protocol Status
Click Advanced Application > Spanning Tree Protocol in the navigation panel to display the
status screen as shown next. See Section 13.1 on page 115 for more information on RSTP.
Note: This screen is only available after you activate RSTP on the Switch.
Figure 64
Advanced Application > Spanning Tree Protocol > Status: RSTP
The following table describes the labels in this screen.
Table 33
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 13.1.3 on page 116 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.