User`s manual

PT-7728 User’s Manual Featured Functions
3-39
At the top of this page, the user can check the Current Status of this function. For RSTP, you will
see:
Now Active:
This field shows which communication protocol is being used—Turbo Ring, RSTP, or neither.
Root/Not Root
This field appears only for RSTP mode. It indicates whether or not this PT-7728 is the Root of the
Spanning Tree (the root is determined automatically).
At the bottom of this page, the user can configure the Settings for the selected protocol. For RSTP,
you can configure:
Protocol of Redundancy
Setting Description Factory Default
Turbo Ring This selects the Turbo Ring protocol. None
RSTP (IEEE 802.1W/1D) This selects the RSTP protocol. None
Bridge Priority
Setting Description Factory Default
Numerical value selected
by user
This specifies the PT-7728’s bridge priority. A
lower number means a higher priority, which
means a greater chance of being established as
the root of the Spanning Tree topology.
32768
Forwarding Delay
Setting
Description
Factory Default
Numerical value input by
user
This specifies the amount of time this device will
wait before checking to see if it should change to
a different state.
15 (sec.)
Hello Time (sec.)
Setting Description Factory Default
Numerical value input by
user
This specifies the time interval between “hello”
messages broadcast by the root of the Spanning
Tree topology. The "hello" message is used to
check if the topology is healthy.
2
Max. Age (sec.)
Setting Description Factory Default
Numerical value input by
user
This specifies the amount of time to wait for a
“hello” message from the root before the
PT-7728 will reconfigure itself as a root. When
two or more devices on the network are
recognized as a root, the devices will renegotiate
to set up a new Spanning Tree topology.
20
Enable STP per Port
Setting Description Factory Default
Enable/Disable This includes the selected port as a node on the
Spanning Tree topology.
Disabled