R/AR系列路由器PSTN备份IP选路典型配置

VOIP中PSTN备份IP选路典型配置

一、  组网需求

用户用VoIP跑IP电话业务，客户希望在VoIP链路down掉的时候能自动切换到PSTN网络进行正常电话通讯。

 

二、  组网图：

 

三、  基本思路

是先匹配VoIP语音实体，再匹配POTS语音实体。即对于某被叫号码，先匹配VoIP语音实体，当VoIP语音实体定义的对端语音网关不可达（网络层不通）时，则继续根据相同被叫号码寻找POTS语音实体进行匹配。

 

四、  配置步骤：

RTA配置脚本

#      sysname RT1                               #     local-user admin                            password cipher .]@USE=B,53Q=^Q`MAF4<1!!   service-type telnet terminal               level 3                                    service-type ftp                           #     interface Serial1/1                         link-protocol ppp                          ip address 1.1.1.1 255.255.255.252        #     voice-setup                                  #     aaa-client                                 #     dial-program                                 select-rule type-first 2 1 3               #     entity 751 voip      //voip实体                        match-template 07512001                    address ip 2.2.2.2                       #     entity 1001 pots                             match-template 0101001                     line 2/0                                 #     entity 1426 pots     //配置相同号码的POTS实体                        match-template 07512001                     line 3/1                                    priority 10       //更改优先级                     send-number all            #     gk-client                                  #     sip   #     subscriber-line 2/0                        #     subscriber-line 2/1                         #     subscriber-line 3/0                        #     subscriber-line 3/1                      #     ip route-static 0.0.0.0 0.0.0.0 2.2.2.2 preference 60                           ip route-static 2.2.2.0 255.255.255.0 Serial 1/1 preference 60                 #     return

RTB配置脚本

#                                    sysname RT2                        #                                   interface Serial3/1                  clock DTECLK1                       link-protocol ppp                   ip address 2.2.2.2 255.255.255.252 #                                   voice-setup                           #                                   aaa-client                          #                                   dial-program                          #                                    entity 10 voip      //VOIP实体                  match-template 0101001              address ip 1.1.1.1                #                                   entity 2001 pots                      match-template 07512001             line 2/0                            entity 1426 pots     //配置相同号码的POTS实体                 match-template 0101001              line 3/1                            priority 10       //更改优先级              send-number all                                  #                                   gk-client                            #                                   sip                                 #                                   subscriber-line 2/0                 #                                   subscriber-line 2/1                 #                                    subscriber-line 3/0                 #                                   subscriber-line 3/1               #                                    FTP server enable                  #                                    ip route-static 0.0.0.0 0.0.0.0 Serial 3/1 1.1.1.1  preference 60              #                                   return