This read-write TruthValue lets an admin administratively set the IS-IS overload bit specifically for both IPv6 routing levels, telling neighbors to avoid using this router for IPv6 transit even absent an actual resource shortage. As with its IPv4 counterpart, the overload bit stays set automatically whenever the implementation runs out of memory regardless of this setting, so this object only controls the deliberate administrative override. For example, an admin isolating an IPv6 forwarding issue on this router could set this to true to pull it out of the IPv6 IS-IS transit path while troubleshooting.