3Com SUPERSTACK II 2000 TR, Manual

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6-2 C
HAPTER
6: M
ONITORING
T
HE
TR-
IN
-FE M
ODULE
Statistics Overview
The TR Port Statistics screen provides a top level sum-
mary of TR-in-FE Port statistics. You can use the sum-
mary to estimate the amount of traffic on your
network backbone, and to check the health of the
incoming connection. To view the summary, proceed
as follows from the I/O Module menu:
1
Enter the *Unit ID* number of the unit you wish to
view.
2
Select the STATISTICS button.
The TR Port Statistics screen appears. See Figure 6-2.
Figure 6-2 TR Port Statistics Screen
The figures shown for each statistic on this screen
include TR-in-FE management traffic and normal
Token Ring traffic.
The Port Statistics screen displays the following fields:
Unit ID — Identifies the currently selected unit.
Port ID — Identifies the currently selected port. It
should read TIF.
Link State — Displays the current state of the unit.
The states include:
■
Listening —The state in which all ports are
placed while Spanning Tree configures the net-
work topology. Ports remain in this state until
the root bridge is selected. This period should
be long enough for a port to hear from all other
ports on the switch.
■
Learning —The state in which ports receive
data on the topology of the network for the
purpose of learning the stations attached to the
port. If the port receives no information that
would force it into the blocking state, then it
moves on to the forwarding state.
■
Forwarding —This state allows the port to per-
form standard switching and bridging func-
tions. Packets are received and the port either
forwards or discards them based on the address
of the packet and the switch’s address table.
■
Blocking —In this state, the port continues to
receive data on the status of the network topol-
ogy but does not transmit them. The port nei-
ther receives packets nor learns the addresses of
stations for forwarding or receiving.
■
Disabled —The state in which Spanning Tree
has been turned off. Port is disabled by man-
agement.