Command Line Reference Guide

Example (Guard)
FTOS#show spanning-tree 0 guard
Interface
Name Instance Sts Guard type
--------- -------- --------- ----------
Te 0/1 0 INCON(Root) Rootguard
Te 0/2 0 LIS Loopguard
Te 0/3 0 EDS (Shut) Bpduguard
spanning-tree 0
Assigns a Layer 2 interface to STP instance 0 and configures a port cost or port priority, or enables loop guard, root
guard, or the Portfast feature on the interface.
S5000
Syntax
spanning-tree stp-id {cost cost | {loopguard | rootguard} |
portfast [bpduguard [shutdown-on-violation]] | priority
priority}
To disable Spanning Tree group on an interface, use the no spanning-tree stp-id
{cost cost | {loopguard | rootguard} | portfast [bpduguard
[shutdown-on-violation]] | priority priority} command.
Parameters
stp-id Enter the STP instance ID. The range is 0.
cost cost Enter the keyword cost followed by a number as the cost. The range
is 1 to 65535. The defaults are:
• Gigabit Ethernet interface = 4.
• 10-Gigabit Ethernet interface = 2.
• 40-Gigabit Ethernet interface = 2.
• Port Channel interface with Gigabit Ethernet = 3.
• Port Channel interface with 10-Gigabit Ethernet = 1.
• Port Channel interface with 40-Gigabit Ethernet = 1.
loopguard Enter the keyword loopguard to enable STP loop guard on a port
or port-channel interface.
rootguard Enter the keyword rootguard to enable STP root guard on a port or
port-channel interface.
portfast
[bpduguard
[shutdown-on-
viol ation]]
Enter the keyword portfast to enable Portfast to move the
interface into Forwarding mode immediately after the root fails.
Enter the optional keyword bpduguard to disable the port when it
receives a BPDU.
Enter the optional keyword shutdown-on-violation to
hardware disable an interface when a BPDU is received and the port
is disabled.
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