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SmartStack STS16-20D/STS16-20R Token Ring Switches Installation and User Guide Monitoring the Network from the Console Statistics Menu
Hello Time
Time (in seconds) that the root waits between sending configuration messages. This
time is advertised by the root and used by all devices and switches in the active
topology of the spanning tree network.
Max Message Age
Time at which the configuration message used by the spanning tree algorithm
should be discarded. This time is advertised by the root and used by all devices and
switches in the active topology of the spanning tree network.
Forward Delay
Time the root waits between transitions from listening to learning, and from
learning to forwarding. This time is advertised by the root and used by all devices
and switches in the active topology of the spanning tree network.
CRF
VLAN ID of a CRF belonging to this BRF.
PId
Port ID that is used to determine the role of the port in the spanning tree. The port
ID is expressed in the form
port priority.port number.
When using the IEEE
Spanning Tree, priority is configured from the
Spanning Tree Configuration
screen and port number is the bridge number + an internal number for the CRF.
When using the IBM Spanning Tree, the port ID is constructed from
ring number.
bridge number.
PCst (Port Cost)
Cost associated with each port. Lower numbers are generally assigned to ports
attached to faster media (such as FDX or CrossLinks), and higher numbers are
generally assigned to ports attached to slower media.
PSts (Port Status)
Current status of this CRF within the spanning tree. Possible values are:
•
DIS (Disabled)
•
BLK (Blocked) A more effective way to the root bridge exists.
•
LSN (Listening) Removing old address entries.
•
LRN (Learning) Learning new address entries.
•
FWD (Forwarding) This port is the most effective way to the root.
The rules that define the state of the port are as follows: