i am looking for script through i can take weekly backup of configuration.

How is your python? You could easily write a script utilizing netmiko to accomplish this. 

Solar Winds NCM does a great job of it in Orion.

Apparently the link I shared for Rancid was deemed spam. 

Rancid is a free tool that has an ICX/Brocade module that will automatically poll the configuration of a given switch, it leverages code versioning software to maintain an archive of all switch/router configuration changes, and can be configured to automatically e-mail a network team to alert them about configuration changes made to networking environment.

If you're going to delete comments like mine as "spam" perhaps you should also delete references to other software solutions.

If you need a python script I can help.

If you have python installed check that you have setup_tools installed too.

If you don't then:

1) Download: https://bootstrap.pypa.io/get-pip.py
2) python get-pip.py

Install netmiko:

# pip install netmiko

Then the script:

from netmiko import ConnectHandler

from datetime import datetime
import argparse
from getpass import getpass


def main(conf):
    conn = ConnectHandler(**conf)
    dump = conn.send_command('show run')
    filename = 'backup_%(ip)s_%(timestamp)s.conf' % {
        'ip': conf.get('ip'),
        'timestamp': datetime.now().strftime('%s')
    }
    with open(filename, 'wb+') as dump_file:
        dump_file.write(dump)


if __name__ == '__main__':
    command_line = argparse.ArgumentParser()
    command_line.add_argument('--ip', help='IP address of your ruckus ICX')
    command_line.add_argument('--username', help='SSH username')
    command_line.add_argument('--password',
                              help='SSH password (clear text btw!)')

    try:
        args = command_line.parse_args()
    except TypeError:
        print u'Unable to parse args'
    else:
        if None in (args.ip, args.username):
            print u'IP and username is required'
        else:
            _password = args.password
            if not _password:
                _password = getpass()
        conf = {
            'device_type': 'ruckus_fastiron',
            'ip': args.ip,
            'username': args.username,
            'password': _password
        }
        main(conf)


Save it as "backup_icx.py".

To execute help:

$ python backup_icx.py --help

--ip -> ip address of the icx to backup
--username -> ssh username
--password -> ssh password

To create a backup

$ python backup_icx.py --ip=<ip address> --username=<ssh username> --password=<ssh password>

Becareful that password is in clear text. If you don't specify a password arg then you will be prompted for one:

$ python backup_icx.py --ip=<ip address> --username=<ssh username>


You will need SSH enable on the hardware for this to work.

Backups will be saved on the same directory under the name "backup_<ip address>_<timestamp>.conf"

Sorry for the quickly put together script but this could guide you a little.

Cheers!

Scott
I've not heard of Rancid.  Sounds like a winner.  I've been using BNA for years and it includes backing up configs.  
Jim