Queries the specified network device for rx/tx ring parameter information

    CLI Example:

    .. code-block:: bash

        salt '*' ethtool.show_ring <devname>

def show_ring(devname):
    '''
    Queries the specified network device for rx/tx ring parameter information

    CLI Example:

    .. code-block:: bash

        salt '*' ethtool.show_ring <devname>
    '''

    try:
        ring = ethtool.get_ringparam(devname)
    except IOError:
        log.error('Ring parameters not supported on %s', devname)
        return 'Not supported'

    ret = {}
    for key, value in ring.items():
        ret[ethtool_ring_remap[key]] = ring[key]

    return ret