Mark Smith wrote:
2.6. Default Route ~~~~~~~~~~~~~~~~~~~ "The default unicast route (::) may be advertised in an IGP. In an EGP, it may be only advertised to the downstream but must not be advertised in the core." I think the SP LB-IGP/EGP model would be a possible to exeception to this, in the sense that "core" would probably be considered by most people to be the core of the local network, rather than the Internet "core". Maybe that could be clarified.
Any network accepting :: would be by definition a "downstream" and such mistakes tend to be rapidly self-correcting (at least in v4). Here is an alternative paragraph: "The default unicast route (::) may be advertised in an IGP or EGP. It MUST NOT be advertised in an EGP unless it has been requested by the recipient. Here are some ideas that might be useful in section 2:"Routes that a network is unable or unwilling to forward packets towards MUST NOT be advertised in an EGP." (black holing)
"Global unicast routes MUST NOT be originated by and then advertised in an EGP when not authorized by the registered delegate of the address space." (hijacking) - Kevin