网络拓扑如下：
目的：通过配置nqa路由检测工具，来实现静态路由的自动切换，达到网络链路联通性，当主路径故障时，通过配置nqa可使PC1与PC2之间的网络可以无缝连接
PC上配置好ip，网关为路由器直连接口ip地址
路由器各接口配置地址：
R1：
<Huawei>system-view [R1]sysname R1 [R1]interface GigabitEthernet 0/0/2 [R1-GigabitEthernet0/0/2]ip address 10.1.1.254 24 #配置PC1的网关ip [R1-GigabitEthernet0/0/2]inter gig0/0/0 [R1-GigabitEthernet0/0/0]ip address 12.1.1.1 24 [R1-GigabitEthernet0/0/0]inter gig0/0/1 [R1-GigabitEthernet0/0/1]ip address 13.1.1.1 24 [R1-GigabitEthernet0/0/1]qu [R1]dis ip interface brief #查看接口ip地址 *down: administratively down ^down: standby (l): loopback (s): spoofing The number of interface that is UP in Physical is 4 The number of interface that is DOWN in Physical is 0 The number of interface that is UP in Protocol is 4 The number of interface that is DOWN in Protocol is 0 Interface IP Address/Mask Physical Protocol GigabitEthernet0/0/0 12.1.1.1/24 up up GigabitEthernet0/0/1 13.1.1.1/24 up up GigabitEthernet0/0/2 10.1.1.254/24 up up NULL0 unassigned up up(s) [R1]
R2：
<Huawei>sys [Huawei]sysname R2 [R2]interface gig0/0/0 [R2-GigabitEthernet0/0/0]ip address 12.1.1.2 24 [R2-GigabitEthernet0/0/0]inter gig0/0/1 [R2-GigabitEthernet0/0/1]ip address 24.1.1.2 24 [R2-GigabitEthernet0/0/1]qu [R2]dis ip interface brief #查看接口ip地址 *down: administratively down ^down: standby (l): loopback (s): spoofing The number of interface that is UP in Physical is 3 The number of interface that is DOWN in Physical is 1 The number of interface that is UP in Protocol is 3 The number of interface that is DOWN in Protocol is 1 Interface IP Address/Mask Physical Protocol GigabitEthernet0/0/0 12.1.1.2/24 up up GigabitEthernet0/0/1 24.1.1.2/24 up up GigabitEthernet0/0/2 unassigned down down NULL0 unassigned up up(s) [R2]
R3：
<Huawei>system-view [Huawei]sysname R3 [R3]inter GigabitEthernet 0/0/1 [R3-GigabitEthernet0/0/1]ip address 13.1.1.3 24 [R3-GigabitEthernet0/0/1]inter gig0/0/2 [R3-GigabitEthernet0/0/2]ip address 34.1.1.3 24 [R3-GigabitEthernet0/0/2]qu [R3]dis ip interface brief *down: administratively down ^down: standby (l): loopback (s): spoofing The number of interface that is UP in Physical is 3 The number of interface that is DOWN in Physical is 1 The number of interface that is UP in Protocol is 3 The number of interface that is DOWN in Protocol is 1 Interface IP Address/Mask Physical Protocol GigabitEthernet0/0/0 unassigned down down GigabitEthernet0/0/1 13.1.1.3/24 up up GigabitEthernet0/0/2 34.1.1.3/24 up up NULL0 unassigned up up(s) [R3]
R4：
<Huawei>sys [Huawei]sysname R4 [R4]inter gig0/0/0 [R4-GigabitEthernet0/0/0]ip address 172.16.2.254 24 [R4-GigabitEthernet0/0/0]inter gig0/0/1 [R4-GigabitEthernet0/0/1]ip address 24.1.1.4 24 [R4-GigabitEthernet0/0/1]inter gig0/0/2 [R4-GigabitEthernet0/0/2]ip address 34.1.1.4 24 [R4-GigabitEthernet0/0/2]qu [R4]dis ip interface brief *down: administratively down ^down: standby (l): loopback (s): spoofing The number of interface that is UP in Physical is 4 The number of interface that is DOWN in Physical is 0 The number of interface that is UP in Protocol is 4 The number of interface that is DOWN in Protocol is 0 Interface IP Address/Mask Physical Protocol GigabitEthernet0/0/0 172.16.2.254/24 up up GigabitEthernet0/0/1 24.1.1.4/24 up up GigabitEthernet0/0/2 34.1.1.4/24 up up NULL0 unassigned up up(s) [R4]
在R1、R4上配置nqa
[R1]nqa test-instance kelly cat #创建nqa管理员Kelly，cat进程
[R1-nqa-kelly-cat]test-type icmp #协议基于icmp
[R1-nqa-kelly-cat]frequency 5 #5秒发送一次探针
[R1-nqa-kelly-cat]timeout 2 #超过2秒网络故障；注：interval seconds默认时间为4s，timeout时间如果大于4s，则需要调整interval seconds的时间大于timeout，且frequency也需大于timeout时间，不然nqa进程无法启动
[R1-nqa-kelly-cat]threshold rtd 1 #超过1秒代表网络质量不好
[R1-nqa-kelly-cat]probe-count 1 #一次发送1个探针
[R1-nqa-kelly-cat]destination-address ipv4 24.1.1.4 #目的ip
[R1-nqa-kelly-cat]source-address ipv4 12.1.1.1 #源ip
[R1-nqa-kelly-cat]start now #现在开始启动
[R4]nqa test-instance kelly cat #创建nqa管理员Kelly，cat进程
[R4-nqa-kelly-cat]test-type icmp #协议基于icmp
[R4-nqa-kelly-cat]frequency 5 #5秒发送一次探针
[R4-nqa-kelly-cat]timeout 2 #超过2秒网络故障；注：interval seconds默认时间为4s，timeout时间如果大于4s，则需要调整interval seconds的时间大于timeout，且frequency也需大于timeout时间，不然nqa进程无法启动
[R4-nqa-kelly-cat]threshold rtd 1 #超过1秒代表网络质量不好
[R4-nqa-kelly-cat]probe-count 1 #一次发送1个探针
[R4-nqa-kelly-cat]destination-address ipv4 12.1.1.1 #目的ip
[R4-nqa-kelly-cat]source-address ipv4 24.1.1.4 #源ip
[R4-nqa-kelly-cat]start now #现在开始启动
所有路由器配置静态路由：
R1
[R1]ip route-static 24.1.1.0 24 GigabitEthernet 0/0/0 12.1.1.2 #去往24.1.1.0网络出接口GE0/0/0，下一跳地址12.1.1.2
[R1]ip route-static 172.16.2.0 24 GigabitEthernet 0/0/0 12.1.1.2 track nqa kelly cat #去往172.16.2.0网络出接口GE0/0/0，下一跳地址12.1.1.2，并调用nqa路由追踪
[R1]ip route-static 172.16.2.0 24 GigabitEthernet 0/0/1 13.1.1.3 preference 100 #备用路径，将优先级调为100，作为备用路由
R2
[R2]ip route-static 10.1.1.0 24 GigabitEthernet 0/0/0 12.1.1.1
[R2]ip route-static 172.16.2.0 24 GigabitEthernet 0/0/1 24.1.1.4
R3
[R3]ip route-static 10.1.1.0 24 GigabitEthernet 0/0/1 13.1.1.1
[R3]ip route-static 172.16.2.0 24 GigabitEthernet 0/0/2 34.1.1.4
R4
[R4]ip route-static 12.1.1.0 24 GigabitEthernet 0/0/1 24.1.1.2
[R4]ip route-static 10.1.1.0 24 GigabitEthernet 0/0/1 24.1.1.2 track nqa kelly cat
[R4]ip route-static 10.1.1.0 24 GigabitEthernet 0/0/2 34.1.1.3 preference 100
nqa查询命令：
display nqa results #查看nqa结果
display nqa history #查询nqa历史记录
