Fast Fault Recovery Method with Preestablished Recovery Table for Reliable Wide Area Layer-2 Network
Recently, wide area Ethernet, which provides virtual connections between company branches by using Ethernet technology, has become wide spread. Ethernet originally lacked fault recovery mechanisms required in Wide Area Networks (WANs) since it originated as Local Area Network (LAN) technology. Protection mechanism against link or node failure is proposed in Ethernet network, but many frame losses are inevitable during the switch over to the backup path. Therefore, to improve reliability of wide area Ethernet, a fault recovery method with few frame losses is required.