（3）跨汇聚环的SR-BE：优先走汇聚链路短的，重路由走汇聚链路长的，

(3) Cross-aggregation ring SR-BE: Prioritize the short aggregation link, reroute the long aggregation link, try not to use the backbone aggregation pair interconnection link, and do not bypass other access rings and aggregation rings;

(3) SR-BE across the convergence ring: priority to take the convergence link short, rerouting to take the convergence link long, try not to take the backbone convergence to the interconnect link, do not bypass other access rings, convergence ring;

(3) Sr-be across convergence ring: priority should be given to those with short convergence link, rerouting should be given to those with long convergence link, try not to take backbone convergence pair interconnection link, and do not bypass other access rings and convergence rings;<BR>