Source address selection with IPv6

Solution Verified - Updated -


  • How does IP source selection work in IPv6?
  • An IPv6 source IP address is not expected, a VIP is used as a source instead of a real IP
  • In RHEL 6.3 and earlier, it is not possible to influence the source address selection with the src directive as is possible in IPv4:
# ip route add via src
# ip route get via dev eth0 src    # desired source address is chosen
# ip -6 route add fc01:1111::0/64 via fc01::1 src fc01::2
# ip route get fc01:1111::0
fc01:1111:: via fc01::1 dev eth0 src fc01::3    # desired source address is NOT chosen


  • Red Hat Enterprise Linux
  • IPv6 (Internet Protocol Version 6 addressing)

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