For each VLAN, the switch with the highest switch priority (the lowest numerical priority value) is elected as the root switch. If all switches are configured with the default priority (32768), the switch with the lowest MAC address in the V...
spanning-tree vlan 2-4094 root-primary ---> per root switch and similarly on the secondary switch but it will not show on the running configuration. Meanwhile i have many trunk ports some of them allow specific vlans and others 4 links must pass the trunks as simple as the below topolo...
There is no limit to the number of MST regions in a network, but each region can support up to 65 spanning-tree instances. Instances can be identified by any number in the range from 0 to 4094. You can assign a VLAN to only one spanning-tree instance at...
pvst Per-Vlan spanning tree mode rapid-pvst Per-Vlan rapid spanning tree mode 生成树: Port ID : 端口优先级(默认128)+端口ID BID: 优先级+MAC地址(MAC不改变) 1、SW2成为VLNA1的主根,VLAN10的备份,SW1成为VLAN10的主,VLAN1的备份 SW2(config)#spanning-tree vlan 10 root secondary SW2(config)#spa...
Instance VLANs Mapped 0 1, 3 to 4094 15 2 Table 1 Command output Field Description Format selector Format selector of the MST region, which is 0 (not configurable). Region name MST region name. Revision level Revision level of the MST region. Instance VLANs Mapped VLAN-to-instance ma...
SW1(config)#spanning-tree mst configuration //进入 MSTP 配置模式 SW1(config-mst)#name CCIE //设置域名 SW1(config-mst)#revision 1 //设置修订级别,默认是 0, SW1(config-mst)#instance 1000 vlan 1-5 //进程创建范围 0-4094, 1-5关联进程 1000 ...
no spanning-tree mst <mst-instance> vlan <vlan-id> Maps a VLAN or a range of VLANs into an MSTP instance. The no form of the command unmaps a VLAN or a range of VLANs from MSTP instances. Syntax Description mst-instance MST instance Range: 1-64 vlan-id A single VLAN or a...
This command creates an MST instance and maps it to VLANs. The no form of this command deletes the instance / unmaps specific VLANs from the MST instance. Syntax instance <instance-id(1-64)> vlan <vlan-range> no instance <instance-id (1-64)> [vlan <vlan-range>]...
Switch D is the designated bridge for VLAN 21, VLAN 23. Figure 1. Spanning Tree Network Example Port Roles Messages from connected devices to the root bridge traverse a least-cost path, which has the smallest cost among all possible paths to the root bridge. The cost of a path is the...
In Figure 5, the VLAN-to-instance mapping table of MST region 3 is: VLAN 1 to MSTI 1, VLAN 2 and VLAN 3 to MSTI 2, and other VLANs to MSTI 0. MSTP achieves load balancing by means of the VLAN-to-instance mapping table. CST The common spanning tree (CST) is a single spanning...