okay. let's give this a shot.

utils/he_ipv6/tunnelbroker.py

@@ -143,30 +143,6 @@ class TunnelBroker(object):
             ipr.close()
             raise e
         for assignment in self.tun.assignments:
-            for a in assignment.iface_addrs:
-                # The interface-specific ":1" addrs.
-                # Try to remove first in case it's already assigned.
-                try:
-                    ipr.addr('del',
-                             index = assignment.iface_idx,
-                             address = a.str,
-                             mask = a.prefix,
-                             family = socket.AF_INET6)
-                    logger.debug('Removed {0} with prefix {1} from {2}.'.format(a.str, a.prefixlen, assignment.iface))
-                except Exception as e:
-                    pass
-                try:
-                    ipr.addr('add',
-                             index = assignment.iface_idx,
-                             address = a.str,
-                             mask = a.prefix,
-                             family = socket.AF_INET6)
-                    logger.debug('Added {0} with prefix {1} to {2}.'.format(a.str, a.prefix, assignment.iface))
-                except Exception as e:
-                    logger.error(('Could not add address {0} on {1}: '
-                                  '{2}').format(a.str, assignment.iface, e))
-                    ipr.close()
-                    raise e
             # The SLAAC prefixes.
             for b in assignment.iface_blocks:
                 # Try to remove first in case it's already assigned.