Spanning tree portfast

Spanning-tree portfast command makes interface on the switch jump up from spanning-tree disable mode to spanning-tree forwarding mode which is different from the normal spanning tree operation that the interface needs to go through listening status and learning state. Therefore, the interface will come up right away.

How to enable spanning-tree portfast


Spanning-tree portfast in interface level
  In the interface level we use " spanning-tree portfast" command to enable it. This is for an access port only. If you want to enable portfast for trunk port "spanning-tree portfast trunk" is required.


Spanning-tree portfast option in the global configuration
  In the global configuration, we can enable the portfast for all of the access ports on the switch by using "spanning-tree portfast default " command. However, this command will not affect the trunk port on the switch

Option for spanning-tree portfast
   - spanning-tree portfast bpduguard default

   - spanning-tree portfast bpdufilter default

   -spanning-tree portfast bpduguard default :  it will enable the bgpuguard on the all of the portfast interfaces on the switch. This is only valid for access port.

   - spanning-tree portfast bpdufilter default  :  it will enable the bgpufilter on the all of the portfast interfaces on the switch. This is only valid for access port.