Hello OVS group,
Sorry for the seemingly simple question. If I have tenant "blue" and tenant
"red" and they both have VMs on different hosts. If I connect 2 hosts with a
GRE tunnel and OVS how does one isolate traffic between the 2 tenants.
My confusion is if they are using the same IP addressing, once the traffic gets
across the GRE tunnel how do you know if the traffic is for the 'red' or the
'blue' tenant. Within a single host I see how you could just use openflow flow
entries "anything on port X is red and only send to red VMs, anything on port Y
is blue...etc..." But at the destination host with a GRE tunnel wouldn't
'blue' and 'red' come in the same GRE port? How do you know which tenant this
originated with? I'm looking for a solution that does not use vlans for
separation - but just openflow flow entries. What would be most common?
Thanks!
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