def METHOD_NAME(duthost):
    xfail_input = [
        ("add", "FC00::xyz/126"),
        ("remove", "FC00::01/126")
    ]
    for op, dummy_neighbor_ipv6_address in xfail_input:
        json_patch = [
            {
                "op": "{}".format(op),
                "path": "/BGP_NEIGHBOR/{}".format(dummy_neighbor_ipv6_address),
                "value": {}
            }
        ]
        tmpfile = generate_tmpfile(duthost)
        logger.info("tmpfile {}".format(tmpfile))
        try:
            output = apply_patch(duthost, json_data=json_patch, dest_file=tmpfile)
            expect_op_failure(output)
        finally:
            delete_tmpfile(duthost, tmpfile)