CCNP 300-115 精簡版 Q.282

rayleigh1990

which command enables you to determine the spanning-tree guard features that are enabled globally?

(C)show spanning-tree detail
(D)show spanning-tree summary

這一題題庫答案給C
可是我使用模擬器實測C這個指令根本沒有看到guard 功能是否開啟，都是介面詳細資訊
反而是D有

SW1#show spanning-tree summary
Switch is in rapid-pvst mode
Root bridge for: VLAN0001, VLAN0010-VLAN0011, VLAN0020, VLAN0500-VLAN0501
  VLAN1010, VLAN1099, VLAN1999, VLAN2048
Extended system ID                      is enabled
Portfast Default                        is disabled
Portfast Edge BPDU Guard Default        is disabled
Portfast Edge BPDU Filter Default       is disabled
Loopguard Default                       is disabled
PVST Simulation Default                 is enabled but inactive in rapid-pvst mode
Bridge Assurance                        is enabled
EtherChannel misconfig guard            is enabled
Configured Pathcost method used is short
UplinkFast                              is disabled
BackboneFast                            is disabled

jac19901112

此題 show spanning-tree detail 沒錯喔，PT有時候模擬不出來環境指令喔，不妨可以嘗試適用GNS3，支援更多指令環境來讓大家練習，希望能替你解答

ho676767

Congratulations

popeye2008

这个是真机上的结果：
SW1#show spanning-tree detail

VLAN0002 is executing the rstp compatible Spanning Tree protocol
  Bridge Identifier has priority 8192, sysid 2, address 00xx.xxcc.xx00
  Configured hello time 2, max age 20, forward delay 15, transmit hold-count 6
  We are the root of the spanning tree
  Topology change flag not set, detected flag not set
  Number of topology changes 0 last change occurred 47w3d ago
  Times:  hold 1, topology change 35, notification 2
          hello 2, max age 20, forward delay 15
  Timers: hello 0, topology change 0, notification 0, aging 300

Port 1 (GigabitEthernet1/1) of VLAN0002 is designated forwarding
   Port path cost 4, Port priority 128, Port Identifier 128.1.
   Designated root has priority 8194, address 00xx.xxcc.xx00
   Designated bridge has priority 8194, address 00xx.xxcc.xx00
   Designated port id is 128.1, designated path cost 0
   Timers: message age 0, forward delay 0, hold 0
   Number of transitions to forwarding state: 1
   The port is in the portfast edge mode by default
   Link type is point-to-point by default
   Bpdu guard is enabled by default
   BPDU: sent 1018, received 0

alexliushi

怎么提高积分啊

勁爆

謝謝大大的分享