L3 MAINTENANCE AND DIAGNOSIS METHOD ADOPTED IN L2 AND L3 VPN, AND DEVICE AND SYSTEM UTILIZING SAME

摘要

An L3 maintenance and diagnosis method, apparatus and system in L2+L3 VPN are provided. In the method, an L2 device (41) borrows an L3 address of a corresponding L3 interface (11), and acts as a proxy of the L3 interface to perform L3 maintenance and diagnosis by borrowing the L3 address of the L3 interface (12).