ZyXEL Communications EES-1024AF - Manual (Page 71)

EES-1024AF Intelligent Ethernet Switch
Advanced Web Management 7-7
Table 7-4 STP Fields Descriptions
FIELD DESCRIPTION
The Current Spanning Tree Root describes the unique root switch information for the instance of
spanning tree.
MAC Address The MAC address of the root switch.
Root Max Age The amount of time (in seconds) the protocol information received on a port is stored
by the root switch.
Root Hello Time The time interval (in seconds) the root switch sends Hello messages to other
switches.
Root Forward
Delay The amount of time (in seconds) a port will remain in the listening or learning states
before entering the forwarding state.
Root Path Cost The path cost to the root switch from this switch.
Root Port The port providing the best path from the switch to the root switch.
The Spanning Tree Bridge Configuration describes this switch information in the spanning tree.
Priority The priority of the switch, default is 32768. The lower the numeric value you assign ,
the higher priority for this switch.
Max Age The amount of time (in seconds) protocol information received on a port is stored by
the root switch, the default value is 20
Hello Time How often the root switch broadcasts Hello message to other switches, the default
value is 2
Forward Delay The amount of time a port will remain in the listening and learning states before
entering the forwarding state, the default value is 15
The Port Configuration describes those ports information in this switch in the spanning tree.
Module Shows the module number of the specific port.
Port Shows the port number.
Trunked Indicates the port is trunked or not.
Priority The port priority. The smaller this value, the higher priority this port has.
State This state of this port. Each port on a switch using STP exists in one of the following
five states: Listening, Learning, Forwarding, Blocking or Disabled
Path Cost The cost of transmission through this port. The smaller this value, the higher cost this
port has. 4 for Gigabit Ethernet and 10 for Fast Ethernet and FDDI
Root Cost The cost of transmission to the root switch.
When you enable the spanning tree protocol, because all ports in the switch will listen and learn,
you may lose communication to the switch you are managing. Wait about 2 times forward delay
(i.e. 2*15 seconds) before you get the communication again.