|[February 20, 2013]
Hurricane Electric's Director of Professional Services Warns of Carrier Grade NAT Drawbacks
FREMONT, Calif. --(Business Wire)--
Electric, the world's largest IPv6-native
Internet backbone and leading colocation
provider, announced today that its Director of Professional Services
and IPv6 Evangelist, Owen DeLong (News - Alert), has issued a warning about the
underestimated costs of Carrier Grade NAT (CGN).
In a recent
piece on Data Center Knowledge, Mr. DeLong argues that the most
common stopgap solution to the IPv4 address-space exhaustion problem -
CGN - has costs greater than its adherents are willing to admit. By
further damaging the end-to-end addressability paradigm inherent in the
Internet Protool, CGN slows innovation, breaks certain applications
(and makes others needlessly complex) and can increase communications
Mr. DeLong begins his admonition by comparing the existing IPv4 address
space to an undersized parking lot for a restaurant. Continuing the
metaphor, DeLong compares NAT (Network Address Translation) to valet
parking, in which the illusion of unlimited space comes at the cost of
maintaining a complex translation table of customers, keys and distant
parking places - and long waits at the valet kiosk.
DeLong discusses CGN's "significant challenges," which include breaking
peer-to-peer applications (e.g., VOIP, multi-player online games, and
some forms of instant messaging) and hampering law enforcement, civil
litigation, and geo-location capabilities. DeLong also discusses
performance problems introduced by NAT Control Points ("NAT Centers"),
which can introduce significantly longer routing paths of data packets.
Furthermore, DeLong describes the lack of scalability in CGN, showing
that neither port-map logging nor the workaround of pre-assigned port
"The question of whether CGN is an effective - or even a viable -
alternative to IPv6 has not been given careful enough consideration,"
said Owen DeLong, Director of Professional Services at Hurricane
DeLong states that the primary impediment to IPv6 adoption is that the
benefits of CGN accrue to the service provider, but that the costs of
CGN fall to the subscriber. For the service provider, it is cheaper to
train staff about CGN than IPv6, and it is initially less expensive to
roll out CGN gateways than to roll out IPv6 to all subscribers. But in
the long term, both subscribers and providers suffer from the reduced
innovation, decreased throughput, and reduced application reliability
and functionality that result from CGN.
About Hurricane Electric (News - Alert)
Fremont, California-based Hurricane Electric operates its own global
IPv4 and IPv6 network and is considered the largest IPv6 backbone in the
world as measured by number of networks connected. Hurricane Electric
offers IPv4 and IPv6 transit solutions over the same connection at
speeds exceeding 10 Gbps. Within its global network, Hurricane Electric
is connected to 59 major exchange points and exchanges traffic directly
with more than 2,700 different networks. Employing a resilient
fiber-optic topology, Hurricane Electric has no less than four redundant
paths crossing North America, two separate paths between the U.S. and
Europe, and rings in Europe and Asia. In addition to its vast global
network, Hurricane Electric owns and operates two data centers in
Fremont, California, including Hurricane's newest facility: the 208,000
ft2 Fremont 2.
For additional information on Hurricane Electric, please visit http://www.he.net.
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