GRE and VXLAN packet use 24bit id range. Max number of ID is 1,677,000 and per host max number of subnet is 4094 that is inner VLAN limitation.
Hiroki Aramaki From: Robert Kukura [mailto:[email protected]] Sent: Tuesday, April 01, 2014 11:17 AM To: [email protected] Subject: Re: [Openstack] Limit of tunnel_id_ranges in Neutron 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 <[email protected]> wrote: On Fri, Mar 28, 2014 at 11:39 PM, Changbin Liu <[email protected]> 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 _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : [email protected] Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : [email protected] Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
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