[Openstack] Limit of tunnel_id_ranges in Neutron

Robert Kukura kukura at noironetworks.com
Tue Apr 1 02:17:25 UTC 2014


On 3/31/14, 1:31 PM, Changbin Liu wrote:
> I notice that there are flow_mod flows on OVS which handle 1-to-1 
> translations between VLAN IDs and GRE/VXLAN tunnel IDs. Does it mean 
> the range of tunnel_ids is limited by VLAN tags?
These local VLAN IDs on br-int are assigned separately on each compute 
or network node by neutron's openvswitch-agent, so you should be able to 
use any number of networks simultaneously in your deployment as long as 
no more than 4094 networks are active at once on any one node.

-Bob
>
>
> Thanks
>
> Changbin
>
>
> On Sun, Mar 30, 2014 at 5:31 PM, Kyle Mestery 
> <mestery at noironetworks.com <mailto:mestery at noironetworks.com>> wrote:
>
>     On Fri, Mar 28, 2014 at 11:39 PM, Changbin Liu
>     <changbin.liu at gmail.com <mailto:changbin.liu at gmail.com>> wrote:
>
>         Hi All,
>
>         Maybe this is a simple question: is there any limit on
>         "tunnel_id_ranges" in Neutron configuration? Say, can I
>         configured it to e.g., "1:10000" if I have 10000 tenants in
>         the cloud. I know VLAN is limited to 4094 tags.
>
>         I googled around this issue but found that most commonly it
>          is configured to default "1:1000".
>
>     There should not be a limit here, although the code will verify
>     the tunnel ID falls within an allowed range for your tunnel
>     protocol (currently GRE or VXLAN).
>
>     Thanks,
>     Kyle
>
>         Thanks
>
>         Changbin
>
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