dns error, network unreachable

Sep 11 15:47:59 zimbra named-sdb[4009]: error (network unreachable) resolving 'google.com/A/IN': 2001:7fd::1#53
Sep 11 15:47:59 zimbra named-sdb[4009]: error (network unreachable) resolving './NS/IN': 2001:7fd::1#53
Sep 11 15:48:02 zimbra named-sdb[4009]: error (network unreachable) resolving 'google.com/A/IN': 2001:dc3::35#53
Sep 11 15:48:02 zimbra named-sdb[4009]: error (network unreachable) resolving './NS/IN': 2001:dc3::35#53
Sep 11 15:48:10 zimbra named-sdb[4009]: error (network unreachable) resolving 'google.com/A/IN': 2001:500:1::803f:235#53
Sep 11 15:48:10 zimbra named-sdb[4009]: error (network unreachable) resolving 'google.com/A/IN': 2001:503:c27::2:30#53
Sep 11 15:48:10 zimbra named-sdb[4009]: error (network unreachable) resolving './NS/IN': 2001:500:1::803f:235#53
Sep 11 15:48:10 zimbra named-sdb[4009]: error (network unreachable) resolving './NS/IN': 2001:503:c27::2:30#53
Sep 11 15:48:22 zimbra named-sdb[4009]: error (network unreachable) resolving 'google.com/A/IN': 2001:503:ba3e::2:30#53
Sep 11 15:48:22 zimbra named-sdb[4009]: error (network unreachable) resolving './NS/IN': 2001:503:ba3e::2:30#53


solusi, setting di named.conf.options di bind

dnssec-enable no;
dnssec-validation no;
dnssec-lookaside auto;