Followed the openstack juno document end to end everything is fine except that I cannot ping the above address

Question which I have, eth2 which is exposed to internet, has following lines in /etc/network/interfaces

iface eth2 inet manual up ip link set dev $IFACE up down ip link set dev $IFACE down

I cannot ping openstack.org from eth2 though it is connected to internet router which is configured network node. is it normal?

my architecture looks like this

controller node connected to internet (192.168.1.x) and management network 10.0.0.x here is interfaces contents

iface eth0 inet static
    address 10.0.0.11
    netmask 255.255.255.0
iface eth1 inet static
    address 192.168.1.211
    netmask 255.255.255.0
    gateway 192.168.1.1

compute node is connected management network (10.0.0.x) and tunnel network (10.0.1.x)

iface eth0 inet static
    address 10.0.0.31
    netmask 255.255.255.0
iface eth1 inet static
    address 10.0.1.31
    netmask 255.255.255.0

Network node is connected to management network(10.0.0.x), tunnel network (10.0.1.x) and internet router

iface eth0 inet static
    address 10.0.0.21
    netmask 255.255.255.0
iface eth1 inet static
    address 10.0.1.21
    netmask 255.255.255.0
iface eth2 inet manual
    up ip link set dev $IFACE up
    down ip link set dev $IFACE down

With this architecture I am not able to ping 203.0.113.101?

is there an problem with interfaces file on on the three nodes?

Arun