def METHOD_NAME(self):
    """Retrieve a list of alternate bridge mib instances.
    :returns: A list of (descr, community) tuples for each operational
              VLAN on this device.
    """
    vlans = yield self.get_operational_vlans()
    community = self.agent_proxy.community
    defer.returnValue(
        [("vlan%s" % vlan, "%s@%s" % (community, vlan)) for vlan in vlans]
    )