Restarting The Protocol; Verifying Rapid Pvst+ Configurations - Cisco Nexus 3000 series Configuration Manual

Configuring Rapid PVST+
This example shows how to configure the link type as a point-to-point link:
switch# configure terminal
switch (config)# interface ethernet 1/4
switch(config-if)# spanning-tree link-type point-to-point
You can only apply this command to a physical Ethernet interface.

Restarting the Protocol

A bridge running Rapid PVST+ can send 802.1D BPDUs on one of its ports when it is connected to a legacy
bridge. However, the STP protocol migration cannot determine whether the legacy switch has been removed
from the link unless the legacy switch is the designated switch. You can restart the protocol negotiation (force
the renegotiation with neighboring switches) on the entire switch or on specified interfaces.
Command
switch# clear spanning-tree detected-protocol
[interface interface [interface-num | port-channel]]
The following example shows how to restart Rapid PVST+ on an Ethernet interface:
switch# clear spanning-tree detected-protocol interface ethernet 1/8

Verifying Rapid PVST+ Configurations

To display Rapid PVST+ configuration information, perform one of these tasks:
Command
switch# show running-config spanning-tree [all]
switch# show spanning-tree [options]
This example shows how to display spanning tree status:
switch# show spanning-tree brief
VLAN0001
Spanning tree enabled protocol rstp
Root ID
Bridge ID
Interface
---------------- ---- --- --------- -------- --------------------------------
Eth1/3
Priority 32768
Address 001c.b05a.5447
Cost 2
Port 131 (Ethernet1/3)
Hello Time 2 sec Max Age 20 sec
Priority 32769 (priority 32768 sys-id-ext 1)
Address 000d.ec6d.7841
Hello Time 2 sec Max Age 20 sec
Role Sts Cost Prio.Nbr Type
Root FWD 2 128.131
Cisco Nexus 3000 Series NX-OS Layer 2 Switching Configuration Guide, Release 5.0(3)U1(1)
Purpose
Restarts Rapid PVST+ on all interfaces on the switch
or specified interfaces.
Purpose
Displays the current spanning tree configuration.
Displays selected detailed information for the current
spanning tree configuration.
Forward Delay 15 sec
Forward Delay 15 sec
P2p Peer(STP)
Restarting the Protocol
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