6-2CHAPTER 6: MONITORING THE TR-IN-FE MODULE
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:
1Enter the *Unit ID* number of the unit you wish to view.
2Select the STATISTICS button.
The TR Port Statistics screen appears. See Figure 6-2.
Figure 6-2TR 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.
