The following steps worked for CentOS 6

# rpm –import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org

# rpm -Uvh http://www.elrepo.org/elrepo-release-6-6.el6.elrepo.noarch.rpm

# yum install kmod-asix

# modprobe asix

# service network restart

The following might be unnecessary but it can be tried if the above fails

# wget http://elrepo.org/linux/elrepo/el6/x86_64/RPMS/kmod-asix-4.13.0-1.el6.elrepo.x86_64.rpm

# rpm -ivh kmod-asix-*.rpm

References:

http://elrepo.org/tiki/tiki-index.php

http://support.plugable.com/plugable/topics/asix_88178_usb_ethernet_adapter_on_centos_6?full_site=1