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1). Cisco CCNP / BCMSN Exam Tutorial: Configuring PortFast And BPDU Guard By : Chris Bryant, CCIE #12933
In your CCNA studies, you learned about PortFast and the trouble it can cause if configured on the wrong port! Suitable only for switch ports connected directly to a single host, PortFast allows a port running STP to go directly from blocking to forwarding mode.
A Cisco router will give you a warning when you configure PortFast:
SW1(config)#int fast 0/5
SW1(config-if)#spanning-tree portfast
%Warning: portfast should only be enabled on ports connected to a
single host.
Article Related to: cisco, ccnp, certification, bpdu, guard, portfast, port, fast, switch, err-disabled, exam, pass
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