A community college district attaches identical RFC1918 CE prefixes…

Question

A community college district attaches identical RFC1918 CE prefixes into several VRFs and needs those routes to remain unique inside MP-BGP. What is the primary purpose of assigning a unique route distinguisher per VRF attachment?

Accepted Answer

To prepend a unique 64-bit value so identical CE prefixes become distinct VPNv4 routes in the MP-BGP table — Think of the RD as a unique barcode stuck on two boxes that both say "10.10.10.0/24" on the side. Same street address on the CE, different barcode in MP-BGP — so the control plane never confuses them. That uniqueness is the RD’s job, not encryption or mesh RT tricks.

Answer

To encrypt VPNv4 updates between route reflectors so campus prefixes stay confidential in transit

Answer

To force every PE to import every RT so spoke clinics form a full-mesh VPN automatically

Answer

To replace LDP labels with BGP LU labels on the underlay so PHP is never required

A community college district attaches identical RFC1918 CE prefixes into several VRFs and needs those routes to remain unique inside MP-BGP. What is the primary purpose of assigning a unique route distinguisher per VRF attachment?

Short Explanation

Full Explanation