如果出现了接口状态为err-disable，show interfaces status err-disabled命令能查看触发err-disable的原因。下面示例原因为bpduguard，在连接了交换机的端口配置了spanning-tree bpduguard enable。sw1#show interfaces status err-disabled Port Name Status Reason Fa0/47 err-disabled bpduguard 接口产生err-...
SWITCH(config-if)#no spanning-tree bpduguard enable SWITCH(config-if)#exit SWITCH(config)#exit But that's not enough, because the port is still down due to the err-disable feature: SWITCH#show interfaces Fa1/0/46 FastEthernet1/0/46 is down, line protocol is down (err-disabled) ...
SWITCH的端口不会收到其他交换机或本交换机其他端口的BPDU,不会触发该端口的STP决策过程,也就不可能blocking该端口,这样就会引起广播风暴。我们可以利用CISCO STP的BPDUguard特性来预防这一点。 int xxx spanning-tree bpduguard enable ***值得注意的是bpduguard可以在全局下配置,也可以在每端口的基础上配置。如果在...
spanning-tree bpdufilter {disable | enable} no spanning-tree bpdufilter 構文の説明 disable enable 指定 さ れた イン ターフ ェイ ス上で BPDU フィルタリング をデ ィ セーブ ルに し ます. 指定 さ れた イン ターフ ェイ ス上で BPDU フィルタリングをイ ネーブル にし ...
A. Enable bpduguard globally. B. Enable rootguard. C. Enable loopguard. D. Enable spanning tree. E. able UDLD 如何将EXCEL生成题库手机刷题 相关题库:CCIE Q题库 > 手机使用 分享 反馈 收藏 举报 参考答案: A 复制 纠错 举一反三 以下哪种情况可选择电缆直埋敷设方式...
Router# show spanning tree summary 返回示例: Switch is in pvst mode Root bridge for: VLAN0001, VLAN0002, VLAN0003 Extended system ID is enabled Portfast Default is disabled PortFast BPDU Guard Default is disabled Portfast BPDU Filter Default is disabled ...
spanning-tree port type network speed 1000 udld aggressive channel-group 10 mode active interface Ethernet1/47 description i=e1/47 vPCpeerLink-Domain99 switchport mode trunk udld aggressive channel-group 99 interface Ethernet1/48 description i=e1/48 vPCpeerLink-Domain99 switchport mode t...
spanning-tree instance 1 vlan 2 10spanning-tree instance 2 vlan 1 254 Output Edge: sh spanning-tree Multiple Spanning Tree (MST) Information STP Enabled : YesForce Version : MSTP-operationIST Mapped VLANs : 3-9,11-253,255-4094Switch MAC Address : 6c3be5-e2a640Switch Priority : 32768Max...
#spanning-tree portfast#BPDUGuard, BPDUFilterS1(config-if-range)#spanning-tree bpduguard enbaleS1(config-if-range)#spanning-tree bpdufilter enable#UplinkFastS1(config)#spanning-tree uplinkfastS1#sh spanning-tree uplinkfast#BackboneFastS1(config)#spanning-tree backbonefastS1#sh spanning-tree backbonefast...
Router# show spanning tree summary 返回示例: Switch is in pvst mode Root bridge for: VLAN0001, VLAN0002, VLAN0003 Extended system ID is enabled Portfast Default is disabled PortFast BPDU Guard Default is disabled Portfast BPDU Filter Default is disabled ...