Reference Guide

1314 | Rapid Spanning Tree Protocol (RSTP)
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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
Defaults
Not configured
Command Modes
INTERFACE
Command
History
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.
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.
priority priority Enter keyword priority followed by a value in increments of 16 as the
priority.
Range: 0 to 240
Default: 128
loopguard
(C-, S-, and E-Series TeraScale only) Enter the keyword loopguard to
enable loop guard on an RSTP port or port-channel interface.
rootguard
(C-, S-, and E-Series TeraScale only) Enter the keyword rootguard to
enable root guard on an RSTP 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 options