On Thu, Oct 29, 2015 at 3:15 PM, Pavel Simerda <psimerda@xxxxxxxxxx> wrote: > Hi all, > > I am writing to Fedora development mailing lists to get opinions > and ideas regarding our project on improving IPv6 support in > Fedora across its components. > > https://fedoraproject.org/wiki/QA/Networking In the above page: * Network configuration: I see NetworkManager in there but nothing about systemd-networkd * Other: firewalld including zones and other such configurations (you mention iptables) > Most prominent subpages: > > * https://fedoraproject.org/wiki/QA/Networking/Test_environment In this section I see "IPv6 node" but nothing that covers a IPv6 only routed network with IPv6 to IPv4 gateway ie it runs v6 only internally but uses 6 to 4 services for legacy services. > * https://fedoraproject.org/wiki/QA/Networking/Client_software Again nothing about a native IPv6 only network with a gateway that supports 6to4 for legacy services outside the network. What about a iOS9 style preferring of IPv6 over IPv4 in the general desktop. In the iOS9 case they do network measurements and favour IPv6 bydefault, and if it's going to be faster but fail back quickly if it's not, how would we deal with this? > * https://fedoraproject.org/wiki/QA/Networking/Server_software Nothing in here about: * IPv6 services RA, dhcp6, 6 to 4 proxies, 4 to 6 proxies and other such transition servers * what about VPN services like a IPv6 only network connecting to a dual stack VPN, or a IPv4 only VPN or a number of combinations there of IE interfaces that are v6 only and ones that are v4 only. What happens with routing then if there's other 6 to 4 services in play? * Load balancers ie like facebook uses to bridge external dual stack to IPv6 only internal services, or providing IPv6 externally to present internal v4 services externally to v6 There's also nothing I can see from a quick read about offload engines. A lot of 10Gb+ network interfaces have offloads for generic IP, TCP, other acceleration to enable to do line speed 10+gb on IPv4, we obviously want acceleration because IPv6 headers are larger and hence take up more memory. There's toolkits like dpgk ( http://dpdk.org ) for acceleration of packets across large bandwidth interfaces but I don't see any mention of that or network IO virtualisation/offload. Facebook and others have been testing these sorts of things: https://code.facebook.com/posts/1123882380960538/linux-ipv6-improvement-routing-cache-on-demand/ https://code.facebook.com/posts/938078729581886/improving-the-linux-kernel-with-upstream-contributions/ Along these lines also I see nothing about Open vSwitch and SND encapsulation protocols testing such as vxlan, GRE, GENEVE etc > During the first phase we are interested in getting feedback on > testing methods and test cases. Any other ideas are of course > welcome. Even contacts for future collaboration would be great. A future development would be around 6LoWPAN and the routing protocols etc for that so we can communicate with IoT devices. The way I read a lot of the pages above is a "this is how we did it on IPv4 lets test it on IPv6" rather than a review of how things are going to change with IPv6, how would I get to a IPv4 site if I'm on a IPv6 network, visa versa and the whole sets of new use cases that are appearing as a result of it. Peter -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
