Users Guide

bpduguard
Enter the keyword portfast to enable Portfast to move the interface into
Forwarding mode immediately after the root fails.
Enter the keyword bpduguard to disable the port when it receives a BPDU.
shutdown-on-
violation
(OPTIONAL) Enter the keywords shutdown-on-violation to hardware disable
an interface when a BPDU is received and the port is disabled.
err-disable Enter the keywords err-disable to enable the port to be put into the error-
disable state (EDS) if an error condition occurs.
vlan vlan-range Enter the keyword vlan then the VLAN numbers. The range is from 1 to 4094.
cost number Enter the keyword cost then the port cost value. The range is from 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 then the Port priority value in increments of 16. The
range is from 0 to 240. The default is 128.
loopguard (C-, S-, and E-Series only) Enter the keyword loopguard to enable loop guard on
a PVST+ port or port-channel interface.
rootguard (C-, S-, and E-Series only) Enter the keyword rootguard to enable root guard on
a PVST+ port or port-channel interface.
Defaults Not configured.
Command Modes INTERFACE
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
Networking OS Command Line Reference Guide.
Version Description
9.8(2.0) Introduced on the S3100 series.
9.8(1.0) Introduced on the Z9100-ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.2(1.0) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.4.2.1 Introduced the loopguard and rootguard options on the E-Series, C-Series,
and S-Series.
8.3.7.0 Introduced on the S4810.
8.2.1.0 Introduced the hardware shutdown-on-violation option.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
1088 Per-VLAN Spanning Tree Plus (PVST+)