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Thanks for the reply Yatin, 
br100 is on my compute/controller (single) host machine. 
I did try for the same, but still I amnot able to ping external world. 

Should I check with nameserver Moxie.corp, is this causing any issues. ?
 
Regards
Neelu 

     On Monday, 29 December 2014 10:49 PM, yatin kumbhare <yatinkumbhare at gmail.com> wrote:
   

 I guess the, masquerade should be on br100
Regards,yatin
On Mon, Dec 29, 2014 at 9:23 PM, Kyle R <k.w.ritchie0 at gmail.com> wrote:

What do your security rules look like for that project/tenant?  
On Mon, Dec 29, 2014 at 9:51 AM, somshekar kadam <som_kadam at yahoo.co.in> wrote:

Hello All, 

I have openstack instance able to ping compute/controller and other hosts in the network. 
Not able to ping google.com 
My external network is 10.10.126.xx
able to ping 10.10.126.1 gateway 

able to ping host controller 10.10.126.62 which also nova compute 
able to ping other hosts 10.10.126.54 and other machines in network. 
able to ping br100 and virbr0
enabled /etc/sysctl.conf to contain the following:net.ipv4.ip_forward=1and also enabled masquerading in the iptablesiptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
internal IP of instance is 10.4.128.2 and floating IP assigned is 10.10.126.129 
On instance route command 
[root at newtry fedora]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         10.4.128.3      0.0.0.0         UG    0      0        0 eth0
10.4.128.0      0.0.0.0         255.255.240.0   U     0      0        0 eth0
[root at newtry fedora]# 

on the controller machine 
stack at celestial-PC-1:~$ route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.1.1     0.0.0.0         UG    0      0        0 wlan0
10.4.128.0      0.0.0.0         255.255.240.0   U     0      0        0 br100
10.10.126.0     0.0.0.0         255.255.255.0   U     0      0        0 br100
192.168.1.0     0.0.0.0         255.255.255.0   U     9      0        0 wlan0
192.168.122.0   0.0.0.0         255.255.255.0   U     0      0        0 virbr0
stack at celestial-PC-1:~$ 



on instance 
[root at newtry fedora]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether fa:16:3e:20:e6:e5 brd ff:ff:ff:ff:ff:ff
    inet 10.4.128.2/20 brd 10.4.143.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::f816:3eff:fe20:e6e5/64 scope link 
       valid_lft forever preferred_lft forever
[root at newtry fedora]# 

 what is missing not able to ping google.com from instance 
please help on this with your valuable suggestions 

thanks in advance 


Regards
Neelu


    
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