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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.
Port
Port number.
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.
PCst
Cost associated with each port. Lower numbers are generally assigned to ports
attached to faster media (such as FDX or CrossLink), and higher numbers are
generally assigned to ports attached to slower media (such as 2400-baud modem
links).
PSts
Current status of this port within the spanning tree. Possible values are:
•
DIS (Disabled)
•
BLK (Blocked)
•
LSN (Listening)
•
LRN (Learning)
•
FWD (Forwarding)
•
DWN (Down)
The rules that define the state of the port are as follows:
•
A port on a network segment that contains no other switch or bridge is always
forwarding.
•
If two ports of the switch are connected to the same network segment and there
is no other bridge or switch, the port with the lower ID is forwarding and the
other is blocked.
CrossFire 8730 Switch Reference Guide, DOC-7047 v. 1.1
Monitoring the Network from the Statistics Menu
177
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