The following example configures the spanning tree bridge forwarding time to 25 seconds. switchxxxxxx(config)#spanning-tree forward-time25 spanning-tree hello-time Use thespanning-tree hello-timeGlobal Configuration mode command to configure how often the device broadcasts Hello messages to o...
SA(config)#spanning-tree vlan 3 priority 9152 //设置此交换机为vlan3的备用根交换机 或SA(config)#spanning-tree vlan 3 root secondary //设置此交换机为vlan3的备用根交换机 SWITCH B: SB(config)#spanning-tree vlan 3 SB(config)#spanning-tree vlan 3 priority 4096 SB(config)#spanning-tree vlan ...
After a switch boots, it starts to build up a Layer 2 forwarding table on the basis of the source MAC address of the different packets that the switch receives. After this forwarding table is built, the switch forwards traffic that is destined for a MAC address directly to the corresponding...
第五个原因就是链路的抖动,当链路在10秒内反复up、down五次,那么就进入err-disable状态。 第六个原因就是keepalive loopback.在12.1EA之前,默认情况下交换机会在所有接口都发送keepalive信息,由 于一些不通交换机协商spanning-tree 可能会有问题,一个接口又收到了自己发出的keepalive,那么这个接口就会变 成err-di...
switch(enable)setcdp{enable|disable}module/port 为了查看Cisco邻接设备的CDP通告信息: switch(enable)showcdpneighbors[module/port][vlan|duplex|capabilities|detail] 5.基于IOS的交换机的端口描述: switch(config-if)#descriptiondescription-string 基于CLI的交换机的端口描述: ...
vlan VLAN Switch Spanning Tree WS-C3850-48P(config-if)#no spanning-tree v 0 有帮助 回复 hong-yh Level 1 回复angel9999 发布时间 02-21-2024 01:22 AM 可以在接口下配置spanning-tree portfast命令将接口配置成边缘端口,就可以了。 0 有帮助 回复 Rps-Cheers VIP 回复a...
craete VLAN Interface ( one of the switch) make sure you allocated respective VLAN where PC connected example : PC-A belong to VLAN 10 example : PC-B belong to VLAN 20 example : PC-C belong to VLAN 30 nterface FastEthernet0/6 switchport access vlan 10 switchport mode access span...
switch# show cdp neighbors [type module/port] [detail] 在基于CLI的交换机上启用和浏览CDP信息: switch(enable) set cdp {enable|disable} module/port 为了查看Cisco邻接设备的CDP通告信息: switch(enable) show cdp neighbors[module/port] [vlan|duplex|capabilities|detail] ...
Switch(config)#spanning-tree backbonefast/---全局启用Backbone Fast---/ 二.STP环路保护机制: BPDU Guard特性可以全局启用也可以基于基于接口的启用,两种方法稍有不同.当在启用了Port Fast特性的端口收到了BPDU后,BPDU Guard特性将关闭(err-disable)该端口(正常情况是启用了Port Fast特性的端口不可能收到BPDU)....
9、show spanning-tree root:查看交换机生成树根位置 10、show cdp neighbors:查看邻接cisco设备基本信息 11、show cdp neighbors detail:查看邻接cisco设备详细信息 12、show interface status:查看交换机接口状态是否存在errordisable接口disable接口 13、show interface summary:查看交换机所有接口当前接口流量 ...