![]() ![]() Provider bridges solve this traffic-mixing issue by providing Layer 2 protocol data unit (PDU) tunneling for customers using a provider bridge (S-bridge) component and a provider edge bridge (C-bridge) component. #Ad helpdesk mac macIf a provider bridge uses these standard MAC addresses for its Layer 2 protocols, the customers' and service provider's Layer 2 traffic will be mixed together. The IEEE has reserved 33 Layer 2 MAC addresses for customer devices operating Layer 2 protocols. For Layer 2 protocols within customer domains to function properly, geographically separated customer sites must appear to be connected via a LAN, and the provider network must be transparent. ![]() Provider bridges pass the network traffic of many customers, and each customer's traffic flow must be isolated from one another.
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