Andrews Square, senior managers sweated the details in marathon sessions, telling Goodwin that he had no choice but to drop RBS' smaller, simpler IT system into the Nat West's giant network--that was the way big IT mergers were done.

FORBES: Magazine Article

However, ISPs have so widely deployed network address translation (NAT) devices, which coordinate multiple intranet addresses through a single Internet address, that they're in no hurry to move to IPv6.

CNN: New protocol sneaks IPv6 traffic over the 'Net

There are a variety of problems associated with masking IPv4 address space behind network address translation technologies, especially Large Scale NAT (LSN) or Carrier Grade NAT (CGN).

FORBES: IPv6: The Time To Consider Making The Switch Is Now

Network executives also may move to IPv6 because of configura-tion problems and the high costs associated with NAT devices.

CNN: New protocol sneaks IPv6 traffic over the 'Net