BGP NVE interface source interface

[JJYRR]

Hello, I'm JJYRR.

I'm asking because I want to know about NVE interface while studying BGP.

Why do I specify the source-interface separately for the NVE interface even if I specify the update-source in the BGP configuration?

@bgp, @nve, @Source-interface 

[MHM Cisco World]

NVE interface is use for encapsulation where BGP update source use only for BGP control 
we separate it for easy admin it not mandatory

MHM 

[MHM Cisco World]

https://www.linkedin.com/pulse/my-journey-vxlan-george-de-pacina <<- check this for why cisco recommend that 

[JJYRR]

Thank you, and your response was helpful.

Does everyone use it in that sense?