Which spanning-tree feature satisfies this requirement?

For client server failover purposes, the application server team has indicated that they must not have the standard 30 second delay before their switchport enters a forwarding state. For their disaster recovery feature to operate successfully, they require the switchport to enter a forwarding state immediately.

Which spanning-tree feature satisfies this requirement?
A . Rapid Spanning-Tree
B . Spanning-Tree Timers
C . Spanning-Tree FastPort
D . Spanning-Tree PortFast
E . Spanning-Tree Fast Forward

View Answer

Answer: D

Explanation:

In order to allow immediate transition of the port into forwarding state, enable the STP PortFast feature. PortFast immediately transitions the port into STP forwarding mode upon linkup. The port still participates in STP. So if the port is to be a part of the loop, the

port eventually transitions into STP blocking mode. Example configuration: Switch-C# configure terminal Switch-C(config)# interface range fa0/3 – 24 Switch-C(config-if-range)# spanning-tree portfast Reference: http://www.informit.com/library/content.aspx? b=CCNP_Studies_Switching&seqNum=36