I’m late to the conversation, but I would have to agree with most. Below a /24 route advertisement shouldn’t happen.

 

I have a /24 that I would love to advertise as 2 /25’s, but the affects on everyone else is just too much. I take full routes from 4 providers, and I certainly don’t want to add over 100K. Carriers and enterprises have to pay a lot for our edge routers doing bgp and most don’t want to upgrade. We would benefit from advertising /25’s but it hurt’s more than it helps.

 

I’m in the alarm industry and they still haven’t started adopting IPv6. If we allow /25 subnets, some industries will never change. In a sense, we have to “force” them to change.

 

Mike