[ppml] IPv4 address and routing slot markets

Scott Leibrand sleibrand at internap.com
Mon Oct 29 16:15:49 EDT 2007

michael.dillon at bt.com wrote:
>> Don't worry about it.  Sooner or later one of the Very Large 
>> ISP's is going to be in the position of they either pony up 
>> the hundreds of millions needed to upgrade all their routers, 
>> or filter and cut off a bunch of idiots.
> The very largest ISPs do a lot of forward planning and already have IPv6
> support in most of their network. They are also all doing various types
> of testing of IPv6 because they are all getting RFIs and RFPs that ask
> for IPv6 support. Probably none of the very largest ISPs will be stuck
> spending millions in capital expenses at the last minute to support an
> expanded IPv4 routing table because they will all be pushing new
> customers towards IPv6 network access.

Do you anticipate that the very large ISPs will drop out of the IPv4 DFZ 
any time soon?  That seems unlikely to me.  While large ISPs do appear 
to be getting positioned to provide IPv6 connectivity to customers, I 
think they'll still need to support the IPv4 routing table as well for 
quite awhile yet.  If they're putting all their new customers on v6, but 
others are expanding their v4 route announcements, that seems like a 
really good set of incentives to "filter and cut off a bunch of idiots" 
to me...


More information about the ARIN-PPML mailing list