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Spanning tree

Configuring the spanning tree protocol (STP) on Cisco devices.

Config options​

! Set spanning tree mode
spanning-tree mode pvst

! Use portfast on an interface
interface fa0/0
  spanning-tree portfast

! Use portfast by default
spanning-tree portfast default

Evaluation​

#
show spanning-tree summary

Security​

Instructions on how to make STP more secure using BPDU Guard is covered in the port security chapter.

Routebridge, etc.​

TODO