Chapter 17 Spanning Tree Protocol
GS1510 Series User’s Guide
99
Hello Time 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.
Forward Delay This is the time (in seconds) the root switch will wait before changing
states.
Current Bridge Status
MAC Address This is the MAC address of the current bridge.
Priority Priority is used in determining the root switch, root port and designated
port. The switch with the highest priority (lowest numeric value)
becomes the STP root switch. If all switches have the same priority, the
switch with the lowest MAC address will then become the root switch.
Priority determines the root bridge, which in turn determines the Root
Hello Time, Root Maximum Age and Root Forwarding Delay.
Max Age This is the maximum time (in seconds) the Switch can wait without
receiving a BPDU before attempting to reconfigure. All Switch ports
(except for designated ports) should receive BPDUs at regular intervals.
Any port that ages out STP information (provided in the last BPDU)
becomes the designated port for the attached LAN. If it is a root port, a
new root port is selected from among the Switch ports attached to the
network.
Hello Time This is the time interval in seconds between BPDU (Bridge Protocol Data
Units) configuration message generations by the root switch.
Forward Delay This is the maximum time (in seconds) the Switch will wait before
changing states. This delay is required because every switch 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 blocking state; otherwise,
temporary data loops might result.
Path Cost Path cost is the cost of transmitting a frame on to a LAN through that
port. It is recommended to assign this value according to the speed of
the bridge. The slower the media, the higher the cost.
Root Port This is the number of the port on the Switch through which this Switch
must communicate with the root of the Spanning Tree.
Refresh Click this to update the status screen.
Table 29 STP Status (continued)
LABEL DESCRIPTION
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