When the rdisc6 utility is available probe for router
advertisement. configure eni and rhel-netscripts interfaces
to do IPv6 address configuration according to the flags
in the RA recived from the router.
The systemd service file timeout is DIB_DHCP_TIMEOUT * 2,
so that DHCPv4 can timout, and dhcpv6 run before the service
times out.
Retries are commented in dhclient.conf, without it we end up
trying DIB_DHCP_TIMEOUT * 60 before the client move on to
IPv6.
WHEN:
Stateful address conf. : No
Stateful other conf. : No
THEN:
Do not run dhclient at all, autoconfiguration via
SLAAC only.
WHEN:
Stateful address conf. : No
Stateful other conf. : Yes
THEN:
Run "dhclient -6 -S", The ``-S`` option makes the
dhcp client not request an address, only other
options such as DNS servers and NTP servers from
DHCPv6 server.
WHEN:
Stateful address conf. : Yes
Stateful other conf. : Yes
THEN:
The dhcp client should request an address _and_ other
options such as DNS servers and NTP servers from
DHCPv6 server.
NOTE: No IPv6 support added for suse-netscripts
Closes-Bug: 1754219
Change-Id: Icdc79875c33f894ab7eaec8afdfb33a731efff99
f94508d537