TWAREN第二代架構無中斷移轉之設計與實現

Abstract

當TANet與TWAREN共用骨幹之後，TWAREN第一代架構喪失備援能力導致維運風險升高，為解決問題，TWAREN第二代架構（後文簡稱TWAREN2）因應而生，然因兩代架構無法並行，在沿用原有設備的情況下，如何移轉方能使施工期間的網路服務中斷時間減少，本文將說明整個移轉設計所面臨的問題與解決方法，最終達成網路服務無中斷的移轉，令TWAREN2順利上線。

The first generation architecture of TWAREN had lost the fail-safe ability after TANet and TWAREN shared the backbone. We designed the second generation architecture to resolve this problem. But, the two architectures can’t run together because there is no redundant equipment and circuit. We must find out a method to prevent services-break during migration. We shall explain the issues and solutions about the services-continued migration and implementation steps.