When is it required to leak routes into an IS-IS Level 1 area?

When is it required to leak routes into an IS-IS Level 1 area?
A . when a multicast RP is configured in the non-backbone area.
B . when MPLS L3VPN PE devices are configured in the Level 1 areas
C . when equal cost load balancing is required between the backbone and non-backbone areas
D . when unequal cost load balancing is required between the backbone and non-backbone areas

View Answer

Answer: B