> 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/db/extensions/l3_gwmode_dbpy.md).

# l3\_gwmode\_db.py

定义了继承自l3\_db.L3\_NAT\_db\_mixin类的L3\_NAT\_db\_mixin，添加对可配置网关路由器的支持。