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二、配置步骤
1. 配置接口及路由
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# 配置外网接口(主备) interface GigabitEthernet1/0/1 description ISP1-Primary ip address 192.168.1.2 255.255.255.0 nat outbound interface GigabitEthernet1/0/2 description ISP2-Backup ip address 192.168.2.2 255.255.255.0 nat outbound # 配置默认路由(主备优先级) ip route-static 0.0.0.0 0 192.168.1.1 preference 60 # 主路由,优先级较低(优先生效) ip route-static 0.0.0.0 0 192.168.2.1 preference 70 # 备份路由,优先级较高 # 配置NQA检测主线路(触发切换) nqa entry admin isp1-test # 创建NQA测试例 type icmp-echo destination-address ipv4 192.168.1.1 # 检测ISP1网关 frequency 1000 # 每1秒检测一次 reaction 1 checked-element probe-fail threshold-type consecutive 3 action-type trigger-only # 连续3次失败触发动作 # 将NQA与主路由绑定 track 1 nqa entry admin isp1-test # 创建Track关联NQA ip route-static 0.0.0.0 0 192.168.1.1 track 1 preference 60 # 主路由绑定Track