[Openstack-operators] Fwd: FOLSOM: Reachability across subnets

Shyam Goud shyam.todeti at oneconvergence.com
Sat Nov 24 17:00:07 UTC 2012


Oleg,

It shows the ip_forward flag enabled.

# ip netns exec qrouter-f3554f15-78c0-4402-8df5-55ebb8da3f4c sysctl 
net.ipv4.ip_forward
net.ipv4.ip_forward = 1

Thanks,

On Saturday 24 November 2012 12:51 PM, Oleg Gelbukh wrote:
> Hello,
>
> Just to make sure, what is ip_forward set to on the router?
>
> --
> Oleg Gelbukh
> Sr. IT Engineer,
> Mirantis IT
>
>
> On Fri, Nov 23, 2012 at 4:33 PM, Shyam Goud 
> <shyam.todeti at oneconvergence.com 
> <mailto:shyam.todeti at oneconvergence.com>> wrote:
>
>     All,
>
>     Under one Tenant created 1 network with 2 subnets [10.10.10.0/24
>     <http://10.10.10.0/24> and
>     20.20.20.0/24 <http://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
>     <http://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.
>
>
>
>
>
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>

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