路由器 生成树.doc

1.5生成树典型配置举例1.5.1MSTP典型配置举例1.组网需求l网络中所有设备都属于同一个MST域。Device A和Device B为汇聚层设备，Device C和Device D为接入层设备。l通过配置MSTP，使不同VLAN的报文按照不同的MSTI转发：VLAN 10的报文沿MSTI 1转发，VLAN 30沿MSTI 3转发，VLAN 40沿MSTI 4转发，VLAN 20沿MSTI 0转发。l由于VLAN 10和VLAN 30在汇聚层设备终结、VLAN 40在接入层设备终结，因此配置MSTI 1和MSTI 3的根桥分别为Device A和Device B，MSTI 4的根桥为Device C。2.组网图图1-11MSTP典型配置组网图3.配置步骤(1)配置VLAN和端口请按照图1-11在Device A和Device B上分别创建VLAN 10、20和30，在Device C上创建VLAN 10、20和40，在Device D上创建VLAN 20、30和40；将各设备的各端口配置为Trunk端口并允许相应的VLAN通过，具体配置过程略。(2)配置Device A#配置MST域的域名为example，将VLAN 10、30、40分别映射到MSTI 1、3、4上，并配置MSTP的修订级别为0。 system-viewDeviceA stp region-configurationDeviceA-mst-region region-name exampleDeviceA-mst-region instance 1 vlan 10DeviceA-mst-region instance 3 vlan 30DeviceA-mst-region instance 4 vlan 40DeviceA-mst-region revision-level 0#激活MST域的配置。DeviceA-mst-region active region-configurationDeviceA-mst-region quit#配置本设备为MSTI 1的根桥。DeviceA stp instance 1 root primary#全局使能生成树协议。DeviceA stp enable(3)配置Device B#配置MST域的域名为example，将VLAN 10、30、40分别映射到MSTI 1、3、4上，并配置MSTP的修订级别为0。 system-viewDeviceB stp region-configurationDeviceB-mst-region region-name exampleDeviceB-mst-region instance 1 vlan 10DeviceB-mst-region instance 3 vlan 30DeviceB-mst-region instance 4 vlan 40DeviceB-mst-region revision-level 0#激活MST域的配置。DeviceB-mst-region active region-configurationDeviceB-mst-region quit#配置本设备为MSTI 3的根桥。DeviceB stp instance 3 root primary#全局使能生成树协议。DeviceB stp enable(4)配置Device C#配置MST域的域名为example，将VLAN 10、30、40分别映射到MSTI 1、3、4上，并配置MSTP的修订级别为0。 system-viewDeviceC stp region-configurationDeviceC-mst-region region-name exampleDeviceC-mst-region instance 1 vlan 10DeviceC-mst-region instance 3 vlan 30DeviceC-mst-region instance 4 vlan 40DeviceC-mst-region revision-level 0#激活MST域的配置。DeviceC-mst-region active region-configurationDeviceC-mst-region quit#配置本设备为MSTI 4的根桥。DeviceC stp instance 4 root primary#全局使能生成树协议。DeviceC stp enable(5)配置Device D#配置MST域的域名为example，将VLAN 10、30、40分别映射到MSTI 1、3、4上，并配置MSTP的修订级别为0。 system-viewDeviceD stp region-configurationDeviceD-mst-region region-name exampleDeviceD-mst-region instance 1 vlan 10DeviceD-mst-region instance 3 vlan 30DeviceD-mst-region instance 4 vlan 40DeviceD-mst-region revision-level 0#激活MST域的配置。DeviceD-mst-region active region-configurationDeviceD-mst-region quit#全局使能生成树协议。DeviceD stp enable(6)检验配置效果当网络拓扑稳定后，通过使用display stp brief命令可以查看各设备上生成树的简要信息。例如：#查看Device A上生成树的简要信息。DeviceA display stp briefMSTID Port Role STP State Protection 0 Ethernet1/1 ALTE DISCARDING NONE 0 Ethernet1/2 DESI FORWARDING NONE 0 Ethernet1/3 ROOT FORWARDING NONE 1 Ethernet1/1 DESI FORWARDING NONE 1 Ethernet1/3 DESI FORWARDING NONE 3 Ethernet1/2 DESI FORWARDING NONE 3 Ethernet1/3 ROOT FORWARDING NONE#查看Device B上生成树的简要信息。DeviceB display stp briefMSTID Port Role STP State Protection 0 Ethernet1/1 DESI FORWARDING NONE 0 Ethernet1/2 DESI FORWARDING NONE 0 Ethernet1/3 DESI FORWARDING NONE 1 Ethernet1/2 DESI FORWARDING NONE 1 Ethernet1/3 ROOT FORWARDING NONE 3 Ethernet1/1 DESI FORWARDING NONE 3 Ethernet1/3 DESI FORWARDING NONE#查看Device C上生成树的简要信息。DeviceC display stp briefMSTID Port Role STP State Protection 0 Ethernet1/1 DESI FORWARDING NONE 0 Ethernet1/2 ROOT FORWARDING NONE 0 Ethernet1/3 DESI FORWARDING NONE 1 Ethernet1/1 ROOT FORWARDING NONE 1 Ethernet1/2 ALTE DISCARDING NONE 4 Ethernet1/3 DESI FORWARDING NONE#查看Device D上生成树的简要信息。DeviceD display stp briefMSTID Port Role STP State Protection 0 Ethernet1/1 ROOT FORWARDING