多选题Which two statements are correct with regard to route distinguisher as defined in RFC 4364-AKA IP-VPN（MPLS-VPN）？（）AThe configuration to define Route-Distinguisher is Ip vrf bulle Rd 1：1BA route distinguisher can be imported and exported to and from a VRFCRoute-Distinguisher is an 8 byte BGP attribute value used in influencing BGP best path algorithm.DRoute-Distinguisher is an 8 byte value used in creating unique VPNv4 address.
多选题
Which two statements are correct with regard to route distinguisher as defined in RFC 4364-AKA IP-VPN（MPLS-VPN）？（）
A
The configuration to define Route-Distinguisher is Ip vrf bulle Rd 1：1
B
A route distinguisher can be imported and exported to and from a VRF
C
Route-Distinguisher is an 8 byte BGP attribute value used in influencing BGP best path algorithm.
D
Route-Distinguisher is an 8 byte value used in creating unique VPNv4 address.
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