An ISP has a BGP-free MPLS LDP core. The ISP provides Layer 2 VPN and Layer 3 VPN services over the MPLS core. The ISP network monitoring tools show that whenever a new link or a link that was taken out for maintenance is brought up, it causes a short traffic outage that lasts a few seconds.
Which two solutions can mitigate this issue? (Choose two)
A . Carrier-delay down 60 on the interfaces
B . Link dampening on the interfaces
C . BGP dampening on PE routers
D . LDP-IGP sync on the core routers
E . LDP session protection in the core
Answer: B, E