Can I use the prefix length except for 64 bits in IPv6 Router Advertisement.

Solution Verified - Updated -


  • I am using the 56 bits long prefix in IPv6 router, and it's advertised as a prefix for the subnet.
  • I tried to install Red Hat Enterprise Linux 6.5 on this IPv6 network, but it failed since the network interface was not configured properly.
  • When I used the 64 bits long prefix, the problem doesn't occur.


  • Red Hat Enterprise Linux 6.x
  • Red Hat Enterprise Linux 7.x
  • Red Hat Enterprise Linux 8.x

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