[Openstack] Can ping external IPs from VM but can NOT get http response

Rahul Sharma rahulsharmaait at gmail.com
Thu Aug 15 13:39:58 UTC 2013

You also need to change the MTU of either instance or of the network node.

Check the mailthread
https://lists.launchpad.net/openstack/msg24056.html for further


On 8/15/13, Di DX Xu <xudi at cn.ibm.com> wrote:
> Deal all,
> I followed this instruction -
> https://github.com/mseknibilel/OpenStack-Grizzly-Install-Guide/blob/OVS_MultiNode/OpenStack_Grizzly_Install_Guide.rst
>   and finished Grizzly installation on ubuntu 12.04 (3 nodes), and followed
> this instruction -
> https://github.com/mseknibilel/OpenStack-Folsom-Install-guide/blob/master/OpenStack_Folsom_Install_Guide_WebVersion.rst
>  for the network configuration using OpenVSwitch and VLAN mode.
> The VM can be associated with a floating IP successfully so I can ping some
> external IPs from the VM, e.g., www.baidu.com, but when I try to get the
> web page using "wget www.baidu.com", it will stuck:
> $ wget www.baidu.com
> --2013-08-15 05:41:55--  http://www.baidu.com/
> Resolving www.baidu.com (www.baidu.com)...,
> Connecting to www.baidu.com (www.baidu.com)||:80...
> connected.
> HTTP request sent, awaiting response...
> It's weird as the external ip is pingable and the http connection is
> established but can not get the http response...
> Cloud anybody help on this? Many thanks!
> Scott

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