Dell S4048T, Руководство по настройке

Страница: 1052 / 1277

INTERFACE mode
spanning-tree 0 priority priority-value
The range is from 0 to 15.
The default is 8 .
To view the current values for interface parameters, use the
show spanning-tree 0
command from EXEC
privilege mode. Refer to the second example in Enabling Spanning Tree Protocol Globally .
Enabling PortFast
The PortFast feature enables interfaces to begin forwarding traffic approximately 30 seconds sooner.
Interfaces forward frames by default until they receive a BPDU that indicates that they should behave
otherwise; they do not go through the Learning and Listening states. The
bpduguard shutdown-on-
violation
option causes the interface hardware to be shut down when it receives a BPDU. When you only
implement
bpduguard
, although the interface is placed in an Error Disabled state when receiving the BPDU,
the physical interface remains up and spanning-tree drops packets in the hardware after a BPDU violation.
BPDUs are dropped in the software after receiving the BPDU violation.
CAUTION: Enable PortFast only on links connecting to an end station. PortFast can cause loops if it is
enabled on an interface connected to a network.
To enable PortFast on an interface, use the following command.
• Enable PortFast on an interface.
INTERFACE mode
spanning-tree stp-id portfast [bpduguard | [shutdown-on-violation]]
Example of Verifying PortFast is Enabled on an Interface
To verify that PortFast is enabled on a port, use the
show spanning-tree
command from EXEC Privilege
mode or the
show config
command from INTERFACE mode. Dell Networking recommends using the
show
config
command.
Dell#(conf-if-te-1/1)#show conf
!
interface TenGigabitEthernet 1/1
no ip address
switchport
spanning-tree 0 portfast
no shutdown
Dell#(conf-if-te-1/1)#
Spanning Tree Protocol (STP) 1052