Lab 7. STP Features : BPDU Guard 

Disini kita masih menggunakan topology dan konfigurasi sebelumnya

SW 1

SW1(config)#interface e0/0

SW1(config-if)#spanning-tree bpduguard enable

*Feb 1 15:56:38.537: %SPANTREE-2-BLOCK_BPDUGUARD: Received

BPDU on port Et0/0 with BPDU Guard enabled. Disabling port.

*Feb 1 15:56:38.537: %PM-4-ERR_DISABLE: bpduguard error detected

on Et0/0, putting Et0/0 in err-disable state

SW 1

SW1(config)#do show int e0/0

Ethernet0/0 is down, line protocol is down (err-disabled)

Hardware is Ethernet, address is aabb.cc00.0100 (bia aabb.cc00.0100)

MTU 1500 bytes, BW 10000 Kbit/sec, DLY 1000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Auto-duplex, Auto-speed, media type is RJ45

input flow-control is off, output flow-control is unsupported

ARP type: ARPA, ARP Timeout 04:00:00