Default Settings For Rapid Pvst - Cisco Nexus 7000 Series Configuration Manual

Default Settings for Rapid PVST+

• Only Rapid PVST+ or MST can be active at any time for each VDC.
• Port channeling—The port-channel bundle is considered as a single port. The port cost is the aggregation
• For private VLANs, on a normal VLAN trunk port, the primary and secondary private VLANs are two
• We recommend that you configure all ports connected to Layer 2 hosts as STP edge ports.
• Always leave STP enabled.
• Do not change timers because changing timers can adversely affect stability.
• Keep user traffic off the management VLAN; keep the management VLAN separate from the user data.
• Choose the distribution and core layers as the location of the primary and secondary root switches.
• When you connect two Cisco devices through 802.1Q trunks, the switches exchange spanning tree

Default Settings for Rapid PVST+

This table lists the default settings for Rapid PVST+ parameters.
Table 13: Default Rapid PVST+ Parameters
Parameters
Spanning Tree
Spanning Tree mode
VLAN
Extended system ID
MAC address reduction
Bridge ID priority
Port state
Port role
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of all the configured port costs assigned to that channel.
different logical ports and must have the exact STP topology. On access ports, STP sees only the primary
VLAN.
BPDUs on each VLAN allowed on the trunks. The BPDUs on the native VLAN of the trunk are sent
untagged to the reserved 802.1D spanning tree multicast MAC address (01-80-C2-00-00-00). The BPDUs
on all VLANs on the trunk are sent tagged to the reserved Cisco Shared Spanning Tree Protocol (SSTP)
multicast MAC address (01-00-0c-cc-cc-cd).
Configuring Rapid PVST+ Using Cisco NX-OS
Default
Enabled on all VLANs.
Rapid PVST+
Changing the spanning tree mode disrupts
Caution
the traffic because all spanning tree
instances are stopped for the previous
mode and started for the new mode.
All ports assigned to VLAN1.
Always enabled.
Always enabled.
32769 (default bridge priority plus system ID
extension of default VLAN1).
Blocking (changes immediately after convergence).
Designated (changes after convergence).