Stp Extensions - Cisco Nexus 3000 series Configuration Manual

Overview
Changing the spanning tree mode disrupts the traffic because all spanning tree instances are stopped for
Note
the previous mode and started for the new mode.

STP Extensions

The software supports the following Cisco proprietary features:
• Spanning tree port types—The default spanning tree port type is normal. You can configure interfaces
• Bridge Assurance—Once you configure a port as a network port, Bridge Assurance sends BPDUs on
• BPDU Guard—BPDU Guard shuts down the port if that port receives a BPDU.
• BPDU Filter—BPDU Filter suppresses sending and receiving BPDUs on the port.
• Loop Guard—Loop Guard prevents the nondesignated ports from transitioning to the STP forwarding
• Root Guard—Root Guard prevents the port from becoming the root in an STP topology.
connected to Layer 2 hosts as edge ports and interfaces connected to Layer 2 switches or bridges as
network ports.
all ports and moves a port into the blocking state if it no longer receives BPDUs. This enhancement is
available only when you are running Rapid PVST+ or MST.
state, which prevents loops in the network.
Cisco Nexus 3000 Series NX-OS Layer 2 Switching Configuration Guide, Release 5.0(3)U1(1)
STP Extensions
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