Route Distinguisher (RD)

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Route Distinguisher (RD) – A BGP/MPLS-VPN value attached to a route to make otherwise-identical prefixes from different sites or VRFs unique in MP-BGP; configuring a unique RD per CPE in a dual-homed branch improves best-path convergence and simplifies troubleshooting. See: VOS Edge Routing Protocols, Using OSPF for Dual Site HA