| 摘要 |
The present invention discloses a method for implementing Fast Reroute (FRR). The method comprises the following steps of: a system starting up an upper layer protocol to manage and configure a FRR route; an upper layer sending down a active next hop of the FRR; a driver writing an IP address of the FRR into an ECMP table and creating a software table to record correspondence between a FRR group and ECMP group; informing the driver of a prefix address of a subnet route and the index of the FRR group, and the driver finding the index of the ECMP group in the software table, and writing information of the subnet route and the index of the ECMP group into hardware; an upper layer informing the driver of the index of the FRR and an IP address of a new standby next hop when the IP address of the active next hop of the FRR group fails; the driver looking up the software table for the index of the ECMP group, and updating the next hop address of the ECMP group to the new IP address. The present invention improves the response speed of the system designed using chips for FRR switch. |
