spanning-tree rstp
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 cost port-cost Enter the keyword cost then the port cost value. The range
is from 1 to 200000. The defaults are:
• 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 keywords 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-
violation
(OPTIONAL) Enter the keywords shutdown-on-violation
to hardware disable an interface when a BPDU is received
and the port is disabled.
priority priority Enter keyword priority then a value in increments of 16 as
the priority. The range is from 0 to 240. The default is 128.
loopguard Enter the keyword loopguard to enable loop guard on an
RSTP port or port-channel interface.
rootguard Enter the keyword rootguard to enable root guard on an
RSTP port or port-channel interface.
Defaults Not configured.
Rapid Spanning Tree Protocol (RSTP) 1569