> For the complete documentation index, see [llms.txt](https://huataihuang.gitbook.io/cloud-atlas-draft/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://huataihuang.gitbook.io/cloud-atlas-draft/network/packet_analysis/cisco/otv.md).

# Overlay Transport Virtualization (OTV)

Overlay Transport Virtualization (OTV) 是一种跨IDC机房对虚拟化网络解决方案，提供了跨地域跨数据中心对二层网络架构，对于虚拟化迁移有极大价值。