Configuring The Rapid Pvst+ Port Priority - Cisco Nexus 3000 Series Configuration Manual

Configuring the Rapid PVST+ Port Priority

Procedure
Step 1
Step 2
This example shows how to configure the switch as the secondary root bridge for a VLAN:
switch# configure terminal
switch(config)# spanning-tree vlan 5 root secondary diameter 4
Configuring the Rapid PVST+ Port Priority
You can assign lower priority values to LAN ports that you want Rapid PVST+ to select first and higher
priority values to LAN ports that you want Rapid PVST+ to select last. If all LAN ports have the same priority
value, Rapid PVST+ puts the LAN port with the lowest LAN port number in the forwarding state and blocks
other LAN ports.
The software uses the port priority value when the LAN port is configured as an access port and uses VLAN
port priority values when the LAN port is configured as a trunk port.
Procedure
Step 1
Step 2
Step 3
This example shows how to configure the access port priority of an Ethernet interface:
switch# configure terminal
switch(config)# interface ethernet 1/4
switch(config-if)# spanning-tree port-priority 160
You can only apply this command to a physical Ethernet interface.
Cisco Nexus 3000 Series NX-OS Layer 2 Switching Configuration Guide, Release 6.x
72
Command or Action
switch# configure terminal
switch(config)# spanning-tree vlan
vlan-range root secondary [diameter
dia [hello-time hello-time]]
Command or Action
switch# configure terminal
switch(config)# interface type
slot/port
switch(config-if)# spanning-tree
[vlan vlan-list] port-priority priority
Purpose
Enters global configuration mode.
Configures a software switch as the secondary root
bridge. The vlan-range value can be 2 through 4094
(except reserved VLAN values). The dia default is 7.
The hello-time can be from 1 to 10 seconds, and the
default value is 2 seconds.
Purpose
Enters global configuration mode.
Specifies the interface to configure, and enters interface
configuration mode.
Configures the port priority for the LAN interface. The
priority value can be from 0 to 224. The lower the value
indicates the higher the priority. The priority values are
0, 32, 64, 96, 128, 160, 192, and 224. All other values are
rejected. The default value is 128.
Configuring Rapid PVST+
OL-29545-03