BGP using next-hop-self with a route reflector
When implementing the BGP routing protocol, when applied to a route reflector, the next-hop-self keyword for an iBGP neighbor will not modify the next hop for reflected routes. However, this can be overridden by using the all keyword in the command.
Links
https://community.cisco.com/t5/routing/bgp-next-hop-self-not-working-while-doing-rr/td-p/2737272
https://forum.networklessons.com/t/bgp-next-hop-self/1248/72?u=lagapides