[ppml] Effects of explosive routing table growth on ISP behavior

[Scott Leibrand]

Brian Johnson wrote:
> Scott Leibrand wrote:
>   
>>> Question: Does it say you cannot advertise smaller portions as well as the larger block?
>>>
>>>       
>> There's some debate on that, but as I read it, no.  My understanding is that you're free to advertise subnets longer than /32 out of PA space,
>> but other networks are free to filter them.
>>
>> I think it may eventually be necessary to move toward something similar for IPv4, but it's not all that urgent just yet.
>>
>>     
>
> So I can announce subnets longer than /32 to my desire and anyone can
> filter as they desire.
>
> Sounds like the IPv4 status quo to me.

Almost, but with one important difference: you have to announce your 
covering aggregate, which makes it safe to filter more-specifics without 
affecting reachability.

-Scott