Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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A design and implementation of an in-service software upgrade technology to provide a seamless networking services

무중단 네트워킹 서비스 제공을 위한 서비스 중 소프트웨어 업그레이드 기술 설계 및 구현

  • Yoon, Ho-sun (Hyper-connected Communication Research Laboratory, Electronics and Telecommunications Research Institute) ;
  • Ryu, Ho-yong (Hyper-connected Communication Research Laboratory, Electronics and Telecommunications Research Institute)
  • Received : 2016.08.04
  • Accepted : 2016.08.23
  • Published : 2016.09.30
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Abstract

In general, software upgrade technique is needed to add new features or fix bug of software on a network devices. However, the problem is that the software must be upgraded after the termination of networking service to replace new package. An ISSU(In-Service Software Upgrade) technique is used to solve such the problem. ISSU is a technology to upgrade the software without interrupting the network service or an offline network equipment. In this paper, to provide a seamless networking service, we design and implement an architecture to apply ISSU technique to a network operating system. In this paper, we use high-availability feature in N2OS which has been developed by ETRI. In addition, in order to verify that the implemented ISSU function is operation properly, we proceed to test using a test environment based on a virtual machine.

네트워크 장비에서 동작하는 소프트웨어의 버그 수정이나 새로운 기능 추가를 위해서 소프트웨어를 업그레이드 할 필요가 있다. 하지만 서비스 중인 소프트웨어를 업그레이드하기 위해서는 네트워크 서비스를 종료한 후에 소프트웨어를 업그레이드해야만 하는 문제가 있다. 이러한 문제를 해결하기 위해서 서비스 중 소프트웨어 업그레이드(ISSU : In-Service Software Upgrade) 기술이 사용된다. ISSU는 네트워크 장비를 오프라인 시키거나 네트워크 서비스를 중단하지 않고 소프트웨어를 업그레이드하는 기술이다. 본 논문에서는 무중단 네트워킹 서비스를 제공하기 위해서 ISSU 기술을 네트워크 OS에 적용하는 방법을 제안하고 구현한다. 본 논문에서는 고가용성 기능을 가지고 있는 한국전자통신연구원에서 개발한 N2OS를 이용하였다. 또한 ISSU 기능이 정상적으로 동작함을 검증하기 위해서 가상 머신 기반의 시험 환경을 만들고 시험을 진행하였다.

Keywords

References

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