IPv6

IPv6 works best when veth devices are used to bridge VEs to their host. A Networking HOWTO illustrating an IPv6 compliant method of using veth interfaces for VEs can be found in the VEs and HNs in same subnets article.

venet devices are not fully IPv6 compliant. They do not properly support MAC addresses and consequently link local addresses and can not play nice with neighbor discovery or router advertisements, router discovery, or auto-conf. They also require additional modifications to the layer 3 forwarding behaviour of the host via sysctl.

veth devices do require iptables and ip6tables exceptions on the host for each VE address.

See also

• Virtual Ethernet device
• Differences between venet and veth