rfc4271 ORIGIN/path of default route, should the value be 0 or 2?

7 Jul 2020

      Howdy,

I am using a multi-vendor network and validating the inter-operability.

When I announce a default route to a BGP peer using default-originate applied to the peer group/neighbor configuration:

in vendor A that route is sent with ORIGIN 0 (internal)
in vendor B that route is sent with ORIGIN 2 (Unknown)

Downstream it looks like this:

     Network          Next Hop            Metric LocPrf Weight Path
* i 0.0.0.0          192.168.27.1                  100      0 ?
*>i                  192.168.25.1             0    100      0 i
* i                  192.168.27.2                  100      0 ?

I don't believe that it has a functionality impact but I would like to know which one you think follows the RFC more closely.

https://tools.ietf.org/html/rfc4271

thanks,
-Drew

rfc4271 ORIGIN/path of default route, should the value be 0 or 2?

Drew Weaver