Cisco Systems N3KC3064TFAL3 Manual De Usuario
• Forwards frames received from the attached segment.
• Forwards frames switched from another port for forwarding.
• Incorporates the end station location information into its address database.
• Receives BPDUs and directs them to the system module.
• Processes BPDUs received from the system module.
• Receives and responds to network management messages.
Disabled State
A LAN port in the disabled state does not participate in frame forwarding or STP. A LAN port in the disabled
state is virtually nonoperational.
state is virtually nonoperational.
A disabled LAN port performs as follows:
• Discards frames received from the attached segment.
• Discards frames switched from another port for forwarding.
• Does not incorporate the end station location into its address database. (There is no learning, so there is
no address database update.)
• Does not receive BPDUs from neighbors.
• Does not receive BPDUs for transmission from the system module.
Summary of Port States
The following table lists the possible operational and Rapid PVST+ states for ports and the corresponding
inclusion in the active topology.
inclusion in the active topology.
Table 8: Port State Active Topology
Is Port Included in the Active
Topology?
Topology?
Port State
Operational Status
No
Blocking
Enabled
Yes
Learning
Enabled
Yes
Forwarding
Enabled
No
Disabled
Disabled
Synchronization of Port Roles
When the switch receives a proposal message on one of its ports and that port is selected as the new root port,
Rapid PVST+ forces all other ports to synchronize with the new root information.
Rapid PVST+ forces all other ports to synchronize with the new root information.
Cisco Nexus 3000 NX-OS Layer 2 Switching Configuration Guide, Release 5.0(3)U3(1)
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Configuring Rapid PVST+
Understanding Rapid PVST+