Reference Guide

Rapid Spanning Tree Protocol (RSTP) | 1275
Designated port id is 128.257, designated path cost 0
Number of transitions to forwarding state 1
BPDU : sent 27, received 9
The port is not in the Edge port mode
Example
(guard)
FTOS#show spanning-tree rstp guard
Interface
Name Instance Sts Guard type
--------- -------- --------- ----------
Gi 0/1 0 INCON(Root) Rootguard
Gi 0/2 0 FWD Loopguard
Gi 0/3 0 BLK Bpduguard
spanning-tree rstp
c e s
Configure an RSTP interface with one of these settings: port cost, edge port with optional
Bridge Port Data Unit (BPDU) guard, port priority, loop guard, or root guard.
Syntax
spanning-tree rstp {cost port-cost | edge-port [bpduguard [shutdown-on-violation]] | priority
priority | {loopguard | rootguard}}
Parameters
Table 45-1. show spanning-tree rstp guard Command Information
Field Description
Interface Name RSTP interface
Instance RSTP instance
Sts Port state: root-inconsistent (INCON Root), forwarding (FWD), listening
(LIS), blocking (BLK), disabled (DIS), or shut down (EDS Shut)
Guard Type Type of STP guard configured (Root, Loop, or BPDU guard)
cost port-cost 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
edge-port
Enter the keyword edge-port to configure the interface as a Rapid Spanning
Tree edge port.
bpduguard
(OPTIONAL) 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.