Nortel 8100 Guia Do Utilizador
Chapter 4 Configuring and graphing ports
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Configuring Network Management
Configuring MAC learning parameters
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.
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.
Table 13
STG tab fields (continued)
Field
Description