백업 인터페이스 with 같은 IP 가 가능할까? (테스트 필요)

*BACKUP INTERFACE 명령어

  단점: 라인 프로토콜이 살아 있을 때, 백업 인터페이스로 트래픽을 넘기지 않는다.

 

* 브릿징(BVI ) ?

I am not clear whether it is supported to use backup interface on one ethernet pointing to another ethernet interface. Even if it is supported I am not sure that you want to use it. Backup interface depends on the primary interface going protocol down and there are lots of failure scenarios where the ethernet interface is not passing traffic but is still protocol up.

I believe that if you want to use one ethernet to back up another ethernet that you should not assign IP addresses to the ethernet interfaces, should configure bridging, put both ethernet interfaces into the same bridge group, configure Integrated Routing and Bridging, configure the BVI interface, and assign the IP address to the BVI.

 

출처: 

https://community.cisco.com/t5/switching/backup-interface-command/td-p/772342

Backup Interface Command

 

https://m.blog.naver.com/PostView.naver?isHttpsRedirect=true&blogId=jeonghoe&logNo=140019523084 

Cisco > backup Interface 설정법

 

 

*BVI (Bridge Virtual Interace)

https://www.cisco.com/c/en/us/td/docs/iosxr/ncs560/interfaces/71x/b-interfaces-hardware-component-cg-71x-ncs560/integrated_routing_and_bridging.html

Interface and Hardware Component Configuration Guide for Cisco NCS 560 Series Routers, IOS XR Release 7.1.x - Integrated Routin