# extensions

对现有neutron API的扩展。某些plugin可能还支持额外的资源或操作，可以以extension的方式实现。包括firewall、vpnaas、l3、lbaas等。

这些扩展资源类，大部分都继承自neutron.api.extensions.ExtensionDescriptor类，一般都实现了如下的类方法。 get\_name、get\_alias、get\_description、get\_namespace、get\_updated、get\_extended\_resources。


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# Agent Instructions: Querying This Documentation

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Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.