IPv6 Unicast Address Maximum Linux Kernel Setting

Unicast Address Number This setting defines the maximum number of global unicast IPv6 addresses that can be assigned to a single interface. You can check the current setting like so: $ sysctl net.ipv6.conf.default.max_addresses net.ipv6.conf.default.max_addresses = 16 Note: The default keyword changes the interface default setting for any interface that does not have a custom setting specified (even if it matches the default setting). You can replace it with either a specific interface name (so the setting applies only to that interface) or the keyword all to configure all interfaces at once (ignoring interface specific custom settings).