Only if you have a very strict change control procedure. If you have
more than one person who is allowed to reconfigure the cabling without
checking it carefully with the other people, then eventually you *will*
get unexpected devices connected.
Also, these days servers are increasingly acting as routers, and
increasingly supporting VLANs, so unexpected spanning trees
are likely to be generated.
Enabling PortFast is always good if the port connected to a server or
Even the server may act as a router, it is OK to enable PortFast,
because a router doesn't participate in STP.
To prevent human errors, you should always label the cable that has
enabled PortFast, and enable BPDU Guard on the switch.
Enabling PortFast on access ports also prevents the Switch issuing STP
Topology Change Notifications. Excessive TCN's can have an impact on
network performance - a TCN is sent every time a port goes up or down
unless PortFast is used.
Basically always enable PortFast on user ports.
CCIE 15766 wrote: