PROVIDER NETWORK CONNECTIVITY MANAGEMENT FOR PROVIDER NETWORK SUBSTRATE EXTENSIONS

A first service of a provider network obtains an identification of one or more substrate addressable devices included in an extension of the provider network. Based on the identification, a launch of one or more compute instances within the provider network is initiated. The one or more compute instances are to connect the provider network to the extension of the provider network across at least a third-party network by receiving a first control plane message directed to a first substrate addressable device of the one or more substrate addressable devices, by updating a message state data store based at least in part on the first control plane message, and by sending a second control plane message to the first substrate addressable device via a secure tunnel. 提供商网络的第一服务获得包括在所述提供商网络的扩展中的一个或多个底层可寻址装置的标识。基于所述标识发起所述提供商网络内的一个或多个计算实例的启动。所述一个或多个计算实例用于通过接收被导向到所述一个或多个底层可寻址装置中的第一底层可寻址装置的第一控制平面消息，通过至少部分地基于所述第一控制平面消息更新消息状态数据存储区，并且通过经由安全隧道将第二控制平面消息发送到所述第一底层可寻址装置，来跨至少第三方网络将所述提供商网络连接到所述提供商网络的扩展。