Nortel 8100 用户指南

Configuring Network Management

 

You can configure the MAC learning parameters to control high-security 
environments that restrict access to the network. This feature is based on the layer 
2 media access control (MAC) address of the network devices connected to the 
Passport 8000 Series switch. 

State

The port’s current state as defined by application of the Spanning 

Tree Protocol. This state controls what action a port takes on 

reception of a frame. If the bridge has detected a port that is 

malfunctioning, it will place that port into the broken state. 

For ports that are disabled (see EnableStp), this object will have 

a value of disabled.

EnableStp

The enabled/disabled spanning tree status of the port, which will 

affect only the operation of the Spanning Tree Protocol on the 

port. Disabling STP at the spanning tree group will take 

precedence over what is configured here.

FastStart

When FastStart is true, the port is enabled in the Forwarding 

state upon being enabled. If the port receives a spanning tree 

BPDU, the port will start normal STP negotiations.

PathCost

The contribution of this port to the cost of paths toward the 

spanning tree root, which include this port. The IEEE 

802.1D-1990 standard recommends that the default value of this 

parameter be in inverse proportion to the speed of the attached 

LAN.

DesignatedRoot

The unique Bridge Identifier of the bridge recorded as the Root in 

the Configuration BPDUs transmitted by the Designated Bridge 

for the segment to which the port is attached.

DesignatedCost

The path cost of the Designated Port of the segment connected 

to this port. This value is compared to the Root Path Cost field in 

received bridge PDUs.

DesignatedBridge

The Bridge Identifier of the bridge that this port considers to be 

the Designated Bridge for this port’s segment.

DesignatedPort

The Port Identifier of the port on the Designated Bridge for this 

port’s segment.

ForwardTransitions

The number of times this port has transitioned from the Learning 

state to the Forwarding state.

ChangeDetection

If this field is disabled, topology change notifications are not sent 

for the port.

STG tab fields (continued)