1、当主路由不可达时,备份路由生效,Device A通过Device C将报文转发到同样地,Device D作为,在Device D上存在两条到达,下一跳分别为Device B和Device C。该路由可达时,Device D通过Device B将报文转发到 在Device D上通过静态路由、Track与NQA联动,实时判断主路由是否可达。当主路由不可达时,备份路由生效,Device D通过Device C将报文转发到2. 组网图图1-2 静态路由、Track与NQA联动配置组网图3. 配置步骤(1) 按照图1-2创建VLAN,在VLAN中加入对应的端口,并配置各VLAN接口的IP地址,具体配置过
2、程略。(2) 配置Device A# 配置到达,优先级为缺省值60,该路由与Track项1关联。 system-viewDeviceA ip route-static 24 track 1# 配置到达,优先级为80。DeviceA ip route-static 24 preference 80# 配置到达DeviceA ip route-static 24 # 创建管理员名为admin、操作标签为test的NQA测试组。DeviceA nqa entry admin test# 配置测试类型为ICMP-echo。DeviceA-nqa-admin-test type icmp-echo# 配
3、置测试的目的地址为,下一跳地址为,以便通过NQA检测Device ADevice BDevice D这条路径的连通性。DeviceA-nqa-admin-test-icmp-echo destination ip DeviceA-nqa-admin-test-icmp-echo next-hop # 配置测试频率为100ms。DeviceA-nqa-admin-test-icmp-echo frequency 100# 配置联动项1(连续失败5次触发联动)。DeviceA-nqa-admin-test-icmp-echo reaction 1 checked-element probe-fai
4、l threshold-type consecutive 5 action-type trigger-onlyDeviceA-nqa-admin-test-icmp-echo quit# 启动探测。DeviceA nqa schedule admin test start-time now lifetime forever# 配置Track项1,关联NQA测试组(管理员为admin,操作标签为test)的联动项1。DeviceA track 1 nqa entry admin test reaction 1(3) 配置Device BDeviceBDeviceB ip route-static
5、 24 (4) 配置Device CDeviceCDeviceC ip route-static 24 (5) 配置Device DDeviceDDeviceD ip route-static 24 track 1DeviceD ip route-static 24 preference 80DeviceD ip route-static 24 DeviceD nqa entry admin testDeviceD-nqa-admin-test type icmp-echo# 配置测试的目的地址为,下一跳地址为,以便通过NQA检测Device DDevice BDevice A这条路径的连通性
6、。DeviceD-nqa-admin-test-icmp-echo destination ip DeviceD-nqa-admin-test-icmp-echo next-hop DeviceD-nqa-admin-test-icmp-echo frequency 100DeviceD-nqa-admin-test-icmp-echo reaction 1 checked-element probe-fail threshold-type consecutive 5 action-type trigger-onlyDeviceD-nqa-admin-test-icmp-echo quitDe
7、viceD nqa schedule admin test start-time now lifetime foreverDeviceD track 1 nqa entry admin test reaction 1(6) 验证配置结果# 显示Device A上Track项的信息。DeviceA display track allTrack ID: 1Status: PositiveDuration: 0 days 0 hours 2 minutes 14 secondsNotification delay: Positive 0, Negative 0 (in seconds)Referen
8、ce object:NQA entry: admin testReaction:# 显示Device A的路由表。DeviceA display ip routing-tableRouting Tables: PublicDestinations : 10 Routes : 10Destination/Mask Proto Pre Cost NextHop Interface Direct 0 0 Vlan2 Direct 0 0 InLoop0 Static 60 0 Vlan2 Direct 0 0 Vlan3 Direct 0 0 Vlan6以上显示信息表示,NQA测试的结果为主路由可达
9、(Track项状态为Positive),Device A通过Device B将报文转发到# 在Device B上删除VLAN接口2的IP地址。DeviceB interface vlan-interface 2DeviceB-Vlan-interface2 undo ip address Negative 0 days 0 hours 1 minutes 13 seconds Static 80 0 Vlan3以上显示信息表示,NQA测试的结果为主路由不可达(Track项状态为Negative),则备份路由生效,Device A通过Device C将报文转发到# 主路由出现故障后,Device
10、A ping -a PING 56 data bytes, press CTRL_C to breakReply from bytes=56 Sequence=1 ttl=254 time=2 msReply from bytes=56 Sequence=2 ttl=254 time=1 msReply from bytes=56 Sequence=3 ttl=254 time=1 msReply from bytes=56 Sequence=4 ttl=254 time=2 msReply from bytes=56 Sequence=5 ttl=254 time=1 ms- ping statistics -5 packet(s) transmitted5 packet(s) received0.00% packet lossround-trip min/avg/max = 1/1/2 ms# Device D上的显示信息与Device A类似。主路由出现故障后,DeviceB ping -a Reply from bytes=56 Sequence=4 ttl=254 time=1 ms
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