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Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) · Cisco
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B. The VPNv4 address consists of a 64-bit route distinguisher that is prepended to the IPv4 prefix. In a Layer 3 MPLS VPN, the VPNv4 address format is made up of a 64-bit Route Distinguisher (RD) followed by the 32-bit IPv4 address. This ensures that each route is globally unique even if multiple customers are using the same IPv4 address space. C. MP-BGP is used to allow overlapping IPv4 addresses between customers to advertise through the network. MPLS VPNs, through the use of MP-BGP (Multiprotocol BGP), allow overlapping IPv4 address spaces between different customers. The RD ensures that these overlapping addresses are kept distinct and can be advertised in the global MPLS network without conflict.
AI Overview Learn more MPLS Layer 3 VPN Explained Yes, the VPNv4 address is used to advertise the MPLS VPN label. This is done using multiprotocol Border Gateway Protocol (BGP) to exchange VPNv4 routes between routers.
A. RD is prepended to the IPv4 route to make it unique. The Route Distinguisher (RD) is used to make IPv4 routes unique across different VPNs by prepending it to the IPv4 prefix. C. MP-BGP is used to allow overlapping IPv4 addresses between customers to advertise through the network. Multiprotocol BGP (MP-BGP) allows the advertisement of overlapping IPv4 addresses between different customers by using VPNv4 addresses, which include the RD.