Couldn't run ./intera.sh when ping to Sawyer

[lutein]

• Environment: Ubuntu 16.04, ROS Kinetic

Problem: I followed the install instruction in http://sdk.rethinkrobotics.com/intera/Workstation_Setup and everything works well until I connect Sawyer to my computer with cable.

• First I run sudo avahi-autoipd eth0 and the result is:

Found user 'avahi-autoipd' (UID 105) and group 'avahi-autoipd' (GID 113).
Successfully called chroot().
Successfully dropped root privileges.
Starting with address 169.254.6.90
Callout BIND, address 169.254.6.90 on interface eth0
Successfully claimed IP address 169.254.6.90

• Then I open a new terminal and run ping 021608CP00057.local, where 021608CP00057.local is the controller's serial number, the output seems right:

PING 021608CP00057.local (169.254.6.199) 56(84) bytes of data.
64 bytes from 021608CP00057.local (169.254.6.199): icmp_seq=1 ttl=64 time=0.315 ms
64 bytes from 021608CP00057.local (169.254.6.199): icmp_seq=2 ttl=64 time=0.154 ms
64 bytes from 021608CP00057.local (169.254.6.199): icmp_seq=3 ttl=64 time=0.177 ms

• After this, I run ./intera.sh in the folder ros_ws, and the ping command turns to be this:

From 172.17.0.1 icmp_seq=33 Destination Host Unreachable
From 172.17.0.1 icmp_seq=34 Destination Host Unreachable
From 172.17.0.1 icmp_seq=35 Destination Host Unreachable
From 172.17.0.1 icmp_seq=36 Destination Host Unreachable

By the way, the env | grep ROS gives me:

ROS_ROOT=/opt/ros/kinetic/share/ros
ROS_PACKAGE_PATH=/home/minty/ros_ws/src:/opt/ros/kinetic/share
ROS_MASTER_URI=http://021608CP00057.local:11311
ROS_HOSTNAME=localhost
ROSLISP_PACKAGE_DIRECTORIES=/home/minty/ros_ws/devel/share/common-lisp
__ROS_PROMPT=1
ROS_DISTRO=kinetic
ROS_IP=169.254.6.90
ROS_ETC_DIR=/opt/ros/kinetic/etc/ros

I've changed robot_hostname to be the serial number and your_ip = 169.254.6.90 in intera.sh.
I don't know why this sh file can't work? This processing seems workable when I connect another Baxter robot.

Thanks a lot!