It seems no security group set for your VMs. Please set security group to allow ping + ssh for VMs, e.g. for one vm with IP 10.10.10.3. Then try to ping 10.10.10.3 from one vm in 20 subnet. Joey. 在 2012年11月23日星期五，Shyam Goud 写道： > All, > > Under one Tenant created 1 network with 2 subnets [10.10.10.0/24 and > 20.20.20.0/24] and 1 Router with 2 interfaces attached to corresponding > subnets. > > 1. Ping b/w same subnet VMs successful. > 2. Ping to all Router/DHCP (10.10.10.1 & 2/20.20.20.1 & 2) from both > subnet VMs is successful > 3. Ping across subnet VMs fails. > > Am I missing something here, to reach across subnets ? > > ++++++++++++ Router's routing table +++++++++++++ > controller-desktop:~# ip netns exec > qrouter-f3554f15-78c0-4402-**8df5-55ebb8da3f4c route -n > Kernel IP routing table > Destination Gateway Genmask Flags Metric Ref Use Iface > 10.10.10.0 0.0.0.0 255.255.255.0 U 0 0 0 > qr-ff10b98d-55 > 20.20.20.0 0.0.0.0 255.255.255.0 U 0 0 0 > qr-c5c00091-e4 > root at controller-desktop:~# > ++++++++++++++++++++++++++++++**+++++++++++++++++++ > > Thanks, > Shyam. > > > > > > ______________________________**_________________ > OpenStack-dev mailing list > OpenStack-dev at lists.openstack.org > http://lists.openstack.org/**cgi-bin/mailman/listinfo/**openstack-dev<http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev> > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20121128/6fdf88eb/attachment.html>