There is no MC available for ipv6 only clusters!

This is the error the client is getting

This information from installer:

/opt/vertica/sbin/install_vertica --point-to-point --license /tmp/vlicense_546_bytes.dat --rpm /opt/distr/vertica-9.1.0-0.x86_64.RHEL6.rpm --hosts '2b02:6b8:0:1326::2a,2b02:6b8:0:1326::2b,2a02:6b8:0:1626::2c' --dba-user dbadmin --dba-user-password 'qwerty123' --dba-user-home /opt/dbadmin --data-dir /opt/dbadmin --accept-eula --ssh-identity /root/.ssh/id_rsa --ipv6

Setting up each node and modifying cluster...

Creating Vertica Data Directory...

Updating agent...
... agent disabled on ipv6 clusters. Management Console not available.

After some research I found that MC is not available on IPc6 clusters. See below info from Pavel

Hi Dieter,
FYI – MC has been confirmed to be unsupported for IPv6 clusters, see http://jira.verticacorp.com:8080/jira/browse/VER-30894 and the attached email
Besides the agent issue Denis encountered, there is physically no way to enter an IPv6 address when importing a database into MC as the input fields are for a IPv4 address. More details in the Jira.

This is a severe restriction. Even more: this is undocumented.
This restriction should be mentioned in the Vertica Supported Platfroms guide.