Which IOS features are used to avoid Routing loops when dynamic Routing protocols are used betweenPE and CE in MPLS-VPN networks?()
A、Site Of Origin SOO.
B、SHAM links with OSPF
C、BGP cost community
D、BGP feature allow-as in
E、RPF Reverse Path forwarding.
F、Access-list Control in Distance Vector protocol like RIP and EIGRP.