A. only configured on the egress router
B. only configured on the ingress router
C. Is pre-signalled to reduce packet loss
D. Must intersect the primary LSP at two locations
正确答案:参考D

A. only configured on the egress router
B. only configured on the ingress router
C. Is pre-signalled to reduce packet loss
D. Must intersect the primary LSP at two locations
正确答案:参考D