Service network layer: the service network USES the mature Ethernet switch redundancy technology, such as the stack or main standby mode.
业务网络层：业务网络采用成熟的以太网交换机冗余技术，比如堆叠或者主备模式。
Service network layer: the service network USES the mature Ethernet switch redundancy technology, such as the stack or main standby mode.
业务网络层：业务网络采用成熟的以太网交换机冗余技术，比如堆叠或者主备模式。
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