Smart Link和Monitor Link

Smart Link和Monitor Link

Smart Link 简单的说就是实现链路负载，或者理解可将自定义的数据流走哪条链路。
Monitor Link英文的解释就是他的意思，用来做上下端口联动的技术。
       以下图为实例，实现vlan1~100 走SWB,vlan101~200走SWC,但是两台交换机任意一台坏了，实现链路流量自动切换，同时使用Monitor Link实现SWB和SWC上下端口状态联动。

1、配置Smart Link 实现链路负载：
SWA配置：
[SWA]vlan 1 to 200      #创建vlan1-200
[SWA]interface GigabitEthernet 1/0/1
[SWA-GigabitEthernet1/0/1]port link-type trunk
[SWA-GigabitEthernet1/0/1]port trunk permit vlan 1 to 200      #允许vlan通过
[SWA-GigabitEthernet1/0/1]undo stp enable      #需要关闭stp
[SWA-GigabitEthernet1/0/1]quit

[SWA]interface GigabitEthernet 1/0/2
[SWA-GigabitEthernet1/0/2]port link-type trunk
[SWA-GigabitEthernet1/0/2]port trunk permit vlan 1 to 200
[SWA-GigabitEthernet1/0/2]undo stp enable
[SWA-GigabitEthernet1/0/2]quit

[SWA]interface range GigabitEthernet 1/0/3 to GigabitEthernet 1/0/20      #配置自己业务端口（举例）
[SWA-if-range]port link-type access
[SWA-if-range]port access vlan 50      #走SWB
[SWA-if-range]quit

[SWA]interface range GigabitEthernet 1/0/21 to GigabitEthernet 1/0/40      #配置自己业务端口（举例）
[SWA-if-range]port link-type access
[SWA-if-range]port access vlan 150      #走SWC
[SWA-if-range]quit

下面开始是主要配置：
配置MSTP域映射实例（不要想得太复杂，简单理解就是多个vlan的一个集合代号）

[SWA]stp region-configuration       #配置stp域的配置
[SWA-mst-region]region-name test       #可选，配置域名称
[SWA-mst-region]instance 1 vlan 1 to 100       #实例1是vlan-100的集合代号
[SWA-mst-region]instance 2 vlan 101 to 200
[SWA-mst-region]active region-configuration       #激活域配置
[SWA-mst-region]quit

[SWA]smart-link group 1
[SWA-smlk-group1]protected-vlan reference-instance 1       #这里的保护vlan就是业务数据vlan，他和控制vlan相同。控制vlan是发送flush报文的vlan,防止上游设备mac地址表在链路切换时还没有及时更新导致链路中断
[SWA-smlk-group1]port GigabitEthernet 1/0/1 primary       #配置实例1中的vlan优先走此接口
[SWA-smlk-group1]port GigabitEthernet 1/0/2 secondary
[SWA-smlk-group1]flush enable control-vlan 1       #个人觉得可以不配置。（防止mac地址未更新）
[SWA-smlk-group1]preemption mode role       #设置强占模式，当主链路恢复正常优先走主链路
[SWA-smlk-group1]quit
[SWA]
#配置到这里，vlan1~100的数据优先走GigabitEthernet 1/0/1，次优走GigabitEthernet 1/0/2，同理配置
smart-link group 2

[SWA]smart-link group 2
[SWA-smlk-group2]protected-vlan reference-instance 2
[SWA-smlk-group2]port GigabitEthernet 1/0/2 primary
[SWA-smlk-group2]port GigabitEthernet 1/0/1 secondary
[SWA-smlk-group2]flush enable control-vlan 101
[SWA-smlk-group2]preemption mode role
[SWA-smlk-group2]quit
[SWA]
#配置到这里，vlan101~200的数据优先走GigabitEthernet 1/0/2，次优走GigabitEthernet 1/0/1

----------------------------------------------SWA基本配置完毕
SWB配置：
[SWB]interface range GigabitEthernet 1/0/1 to GigabitEthernet 1/0/2
[SWB-if-range]port link-type trunk
[SWB-if-range]port trunk permit vlan all
[SWB-if-range]smart-link flush enable control-vlan 1 101      #上面配置控制vlan,那么这里也需要配置
[SWB-if-range]quit

SWC配置：
[SWC]interface range GigabitEthernet 1/0/1 to GigabitEthernet 1/0/2
[SWC-if-range]port link-type trunk
[SWC-if-range]port trunk permit vlan all
[SWC-if-range]smart-link flush enable control-vlan 1 101

[SWA]display smart-link group all      #查看刚才配置结果如何

2、配置SWB和SWC的端口联动(很简单的)：
配置SWB:
[SWB]monitor-link group 1
[SWB-mtlk-group1]port GigabitEthernet 1/0/2 uplink      #上联端口，可以添加多个
[SWB-mtlk-group1]port GigabitEthernet 1/0/1 downlink      #下联端口，可以添加多个
[SWB-mtlk-group1]quit

配置SWC:
[SWC]monitor-link group 1
[SWC-mtlk-group1]port GigabitEthernet 1/0/2 uplink
[SWC-mtlk-group1]port GigabitEthernet 1/0/1 downlink
[SWC-mtlk-group1]quit