Jun 222015
 

If you get hit with “RTNETLINK answers: Cannot allocate memory” when trying to add IPv6 default gateway back after losing all IPv6 -connectivity, raise net.ipv6.route.max_size.

The defaults (on my machines) were quite small compared to IPv4:

CentOS 7.0:
# sysctl net.ipv4.route.max_size
net.ipv4.route.max_size = 2147483647
# sysctl net.ipv6.route.max_size
net.ipv6.route.max_size = 4096

CentOS 7.1:
# sysctl net.ipv4.route.max_size
net.ipv4.route.max_size = 2147483647
# sysctl net.ipv6.route.max_size
net.ipv6.route.max_size = 16384

Debian 7.8/8.1:
# sysctl net.ipv4.route.max_size
net.ipv4.route.max_size = 2147483647
# sysctl net.ipv6.route.max_size
net.ipv6.route.max_size = 4096

Jun 092015
 

We have a national IPv6 day today (9.6.2015) in Finland, and this time also the largest ISP:s in Finland are attending.

DNA provides currently IPv6 to their mobile networks and cable networks, other connection types will get their support later.

Elisa provides currently IPv6 to their mobile networks (Elisa and Saunalahti), other connections will get their support later.

Sonera “will deploy it automatically to their customers as soon as they have confirmed that it works on their network”, though no concrete promises or dates. There’s some rumours about 6rd support in their cable networks and old https://fi-fi.facebook.com/sonera/posts/119937098144430 about IPv6 support in their corporate broadband offerings.

 

On the other news, Macronet has an IPv6 -enabled cloud platform running and provides all services from there, customer access will come later.

Jun 022015
 

Finnish ISP DNA revealed their IPv6 -support for cable networks, but just listed “these devices are compatible” without more technical details.

How to get running (I used OpenWRT and EPC3825 was just a bridge):
* use DHCPv6-client
* request an /56 -prefix
* router will get an /128 -address and I found my /56 -network at the routes (with ip -6 route)
* drop a slice from it (/64) with radvd to your lan side
* remember to configure an IPv6 -firewall
* enjoy