IPv6 on home routers: FAIL

By Julie Bort, Network World |  Networking, IPv6

"In our IPv6 trial we hand out a /56 to each router. When I discovered that the PC attached to the Netgear router didn't have an IPv6 address, a little poking around revealed that the router was attempting to perform SLAAC with the full /56, rather than select a /64 out of the delegated prefix. In compliance with IETF standards, the PC wasn't getting an IPv6 address. I can only speculate, but it appears that in its testing Netgear was only handing out a /64 to each router, which likely would have resulted in a successful test. "

He alerted Netgear to the problems and reports that the company is working on fixing them.

RECENTLY: Netgear launches routers, home networking products at CES 2011

Netgear isn't alone. David Thompson, product marketing director for CPE provider ZyXEL, recently boasted about how the company implemented IPv6 support in its home networking gear way back in 2006.

Bulk responds, "David speaks positively about ZyXEL's IPv6 support, but the unfortunate reality is that their CPE is not IPv6 ready, at least not in our environment. In less than an hour of testing I showed that: PPPoEv6 was not starting/attempting to connect; the DSL modem doesn't respond to DHCPv6 solicit requests in either stateful DHCPv6 or stateless DHCPv6 mode; clients are unable to obtain an IPv6 address when the LAN interface is configured for SLAAC, etc."

Again, ZyXEL engineers are aware of these issues and are working to fix them.

Bulk names D-Link as one of the few bright spots. Several of the company's older "IPv6-ready" models operate well, but due to storage limitations still lack a stateful firewall for IPv6, an IPv4 feature that is not synonymous with, but generally bound to most implementations of consumer-grade NAT. Hardware revisions are coming this year to address those limitations and support a stateful firewall for IPv6, but Bulk said that one D-Link model has a firewall today.

"We're using the D-Link DIR-655 in our private trial, and feedback from customers has been very positive," shares Bulk. "We'd like to offer our trial customers a few other vendors to choose from, but other than Apple (which I have yet to test), I've found no other consumer-grade IPv6-ready routers in the market."

To be sure, the foot-dragging on the part of consumer equipment makers won't exactly cause an Internet Armageddon.


Originally published on Network World |  Click here to read the original story.
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