> For the complete documentation index, see [llms.txt](https://yeasy.gitbook.io/openstack_code_neutron/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://yeasy.gitbook.io/openstack_code_neutron/neutron/extensions/l3py.md).

# l3.py

L3扩展类，继承自extensions.ExtensionDescriptor，提供路由器支持。

RouterPluginBase，抽象基础类，提供对路由器的操作，被l3\_db.py中的L3\_NAT\_db\_mixin类继承。