[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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