一 双链路技术产业原因随着无线技术的不断发展业务种类日益繁杂AC设备上除负载了组网内所有AP的状态维护数据、各类业务计算逻辑、决策判定处理还在汇聚层上承担了大量的数据转发工作无线组网设备上承载的业务流量日趋加重因此无线设备的冗余性非常重要。如果AC设备发生故障将导致整个无线网络服务中断业务大面积瘫痪。因此单台AC设备管理整个网络的组网形式已经不能满足当前对无线网络的高可靠性需求。AP双链路备份技术为现有无线网络部署提供了一种具有高可靠性的组网方案。通过对两台AC设备进行较为简单的配置可以实现基于AP的链路备份、故障转移以及业务回切功能从而大大降低了单AC故障所带来的网络风险。二 双链路技术优点在AP双链路备份组网中当主AC设备故障时其上负载的AP可迅速倒换至另一台备AC上后者成为新主AC并接管这些AP及无线业务进而在较短时间内恢复原有的无线网络功能。故障的原主AC在恢复重启后可作为备AC用于下一次的故障倒换。三 组网配置与状态查看3.1 组网说明如上图2台AC各自规划一个管理地址通过AP双链路配置对AP进行注册和管理任何一台AC故障都可以相互切换。但是缺点是配置需要重复在2台AC进行相同配置。为了减少不同无线控制器相同配置重复性工作我们可以回顾一下之前的文章V9版本两台无线控制器云集群cloud-cluster 组网配置V9本地转发以及无线控制器早期的堆叠IRF配置3.2 AC01设备配置sysname AC01#vlan 4094description Management#interface Vlan-interface4094description Managementip address 192.168.2.2 255.255.254.0#ip route-static 0.0.0.0 0 192.168.2.1#interface Ten-GigabitEthernet1/0/25description TO-HXport link-type trunkport trunk permit vlan 4094#wlan ap-group f1 //配置主AC AP组优先级为7默认为4priority 7wlan tunnel-preempt enablebackup-ac ip 192.168.2.3ap-model WA5530-SI //AP组统一配置map-configuration cfa0:/ap_map.txtradio 1rate mandatory 12 24rate supported 18 36 48 54rate disabled 6 9radio enablechannel band-width 40radar-detect disableservice-template bgradio 2rate mandatory 12 24rate supported 18 36 48 54rate disabled 6 9radio enablechannel band-width 40radar-detect disableservice-template bgradio 3rate mandatory 11rate supported 12 18 24 36 48 54rate disabled 1 2 5.5 6 9radio enableradar-detect disableservice-template bg#wlan ap-group f2 //配置主AC AP组优先级为7默认为4priority 7wlan tunnel-preempt enablebackup-ac ip 192.168.2.3#ap-model WA5530-SI //AP组统一配置map-configuration cfa0:/ap_map.txtradio 1rate mandatory 12 24rate supported 18 36 48 54rate disabled 6 9radio enablechannel band-width 40radar-detect disableservice-template bgradio 2rate mandatory 12 24rate supported 18 36 48 54rate disabled 6 9radio enablechannel band-width 40radar-detect disableservice-template bgradio 3rate mandatory 11rate supported 12 18 24 36 48 54rate disabled 1 2 5.5 6 9radio enableradar-detect disableservice-template bg#3.3 AC02设备配置sysname AC02#vlan 4094description Management#interface Vlan-interface4094description Managementip address 192.168.2.3 255.255.254.0#ip route-static 0.0.0.0 0 192.168.2.1#interface Ten-GigabitEthernet1/0/25description TO-HXport link-type trunkport trunk permit vlan 4094#wlan ap-group f1 //默认优先级为4wlan tunnel-preempt enablebackup-ac ip 192.168.2.2ap-model WA5530-SI //AP组统一配置map-configuration cfa0:/ap_map.txtradio 1rate mandatory 12 24rate supported 18 36 48 54rate disabled 6 9radio enablechannel band-width 40radar-detect disableservice-template bgradio 2rate mandatory 12 24rate supported 18 36 48 54rate disabled 6 9radio enablechannel band-width 40radar-detect disableservice-template bgradio 3rate mandatory 11rate supported 12 18 24 36 48 54rate disabled 1 2 5.5 6 9radio enableradar-detect disableservice-template bg#wlan ap-group f2 //默认优先级为4wlan tunnel-preempt enablebackup-ac ip 192.168.2.2ap-model WA5530-SI //AP组统一配置map-configuration cfa0:/ap_map.txtradio 1rate mandatory 12 24rate supported 18 36 48 54rate disabled 6 9radio enablechannel band-width 40radar-detect disableservice-template bgradio 2rate mandatory 12 24rate supported 18 36 48 54rate disabled 6 9radio enablechannel band-width 40radar-detect disableservice-template bgradio 3rate mandatory 11rate supported 12 18 24 36 48 54rate disabled 1 2 5.5 6 9radio enableradar-detect disableservice-template bg#3.4 AC01 AP注册状态查看查看AP状态为R/M状态3.5 AC02 AP注册状态查看查看AP状态为R/B状态