Reference Guide

1200 | Per-VLAN Spanning Tree Plus (PVST+)
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Defaults
Not Configured
Command Modes
INTERFACE
Command
History
shutdown-on-vi
olation
(OPTIONAL) Enter the keyword shutdown-on-violation to hardware disable
an interface when a BPDU is received and the port is disabled.
err-disable
Enter the keyword err-disable to enable the port to be put into error-disable
state (EDS) if an error condition occurs.
vlan vlan-range
Enter the keyword vlan followed by the VLAN number(s).
Range: 1 to 4094
cost number
Enter the keyword cost followed by the port cost value.
Range: 1 to 200000
Defaults:
100 Mb/s Ethernet interface = 200000
1-Gigabit Ethernet interface = 20000
10-Gigabit Ethernet interface = 2000
Port Channel interface with one 100 Mb/s Ethernet = 200000
Port Channel interface with one 1-Gigabit Ethernet = 20000
Port Channel interface with one 10-Gigabit Ethernet = 2000
Port Channel with two 1-Gigabit Ethernet = 18000
Port Channel with two 10-Gigabit Ethernet = 1800
Port Channel with two 100-Mbps Ethernet = 180000
priority value
Enter the keyword priority followed the Port priority value in increments of
16.
Range: 0 to 240. Default: 128
loopguard
(C-, S-, and E-Series TeraScale only) Enter the keyword loopguard to enable
loop guard on a PVST+ port or port-channel interface.
rootguard
(C-, S-, and E-Series TeraScale only) Enter the keyword rootguard to enable
root guard on a PVST+ port or port-channel interface.
version 8.3.19.0 Introduced on S4820T
Version 8.4.2.1 Introduced the loopguard and rootguard options on the E-Series TeraScale,
C-Series, and S-Series.
Version 8.3.7.0 Introduced on S4810
Version 8.2.1.0 Introduced hardware shutdown-on-violation option
Version 7.6.1.0 Support added for S-Series
Version 7.5.1.0 Support added for C-Series
Version 7.4.1.0 Added the optional Bridge Port Data Unit (BPDU) guard
Version 6.2.1.1 Introduced