Lab 5. STP Features : Portfast 

SW-1

SW-1#debug spanning-tree events

SW-1(config)#int e0/0

SW-1(config-if)#shutdown

*Feb 1 12:05:41.821: %LINK-5-CHANGED: Interface Ethernet0/0, changed

state to administratively down

SW-1(config-if)#no shutdown

*Feb 1 12:05:48.316: STP: VLAN0010 Et0/0 -> listening

*Feb 1 12:06:03.317: STP: VLAN0010 Et0/0 -> learning

*Feb 1 12:06:26.431: STP: VLAN0010 Et0/0 -> forwarding

 Konfigurasikan portfast pada SW-1

SW-1

SW-1(config)#int e0/0

SW-1(config-if)#spanning-tree portfast

Kita verifikasi

SW-1

SW-1#show spanning-tree int e0/0 detail

Port 1 (Ethernet0/0) of VLAN0010 is designated forwarding

 Port path cost 100, Port priority 128, Port Identifier 128.1.

 Designated root has priority 32778, address aabb.cc00.0200

 Designated bridge has priority 32778, address aabb.cc00.0200

 Designated port id is 128.1, designated path cost 0

 Timers: message age 0, forward delay 0, hold 2

 Number of transitions to forwarding state: 1

 The port is in the portfast edge mode

 Link type is point-to-point by default

 BPDU: sent 1065, received 0

BPDU masih tetap dikirimkan pada link Portfast. Pengetesannya, jalankan

debug kemudian lepas kabel atau shutdown, no shutdown.

SW-1

SW-1#debug spanning-tree events Spanning Tree

event debugging is on

!

SW-1(config)#int e0/0

SW-1(config-if)#shutdown

SW-1(config-if)#

*Feb 1 12:00:42.509: STP: VLAN0010 we are the spanning tree

root SW-1(config-if)#

*Feb 1 12:00:44.514: %LINK-5-CHANGED: Interface Ethernet0/0, changed state

to administratively down

*Feb 1 12:00:45.520: %LINEPROTO-5-UPDOWN: Line protocol on Interface

Ethernet0/0, changed state to down

SW-1(config-if)#no shutdown

SW-1(config-if)#exit

*Feb 1 12:00:51.687: STP: VLAN0010 Et0/0 ->jump to forwarding fromblocking