Hi Park,
My answer is your question as below;. > My assumption is that 3 nodes are in a same tenant network, so are > connected with the full-meshed tunnels with the same key. > Yes, this makes sense. > I have other question in openstack's quantum network with GRE based > multi-tenant. > I know that openstack has the full-meshed tunnels(same key) for multi > virtual machines connectivity with same tenant network(means same key) on > multi computing nodes. May I misunderstand? > Could you describe more about the 'loop error'? Is that all links are congested? When you setup multiple tunnels between same pair of nodes at the same time. There may be broadcast packets (e.g. IPv6 broadcast) sent through each tunnel. And such broadcast packet will loop among the multiple tunnels. Could you provide the "ovs-dpctl dump-flows" output at any pair of nodes? Also, could you try setting the 'fail-mode' of bridges to 'secure'? using "ovs-vsctl set bridge [bridge_name] fail-mode=secure" and see if there is still loop? Thanks, Alex Wang,
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