This is something we are exploring as part of our next effort.
Thanks, Rudra ________________________________ From: Dev <[email protected]> on behalf of Piotr P <[email protected]> Sent: Tuesday, August 18, 2015 10:17 AM To: [email protected] Subject: Re: [opencontrail-dev] Active-active loadbalancer Hi, Let me ask one more question regarding load balancer because this is interesting topic. >From what I've seen both instances have the same IP and MAC Adresses for both >interfaces (Righ, Left). Normally separate instances of haproxy could have >different addresses on the side of the backend Network. They will do checks >individually. and probably could scale >2 instances. Is it possible even theoretically that we could do that by only change IP and MAC on the Backend Network Side ? In my mind we need only ECMP only for VIP Address, In Backend each instance could have unique mac and IP address. Do you see this as possible scenario at all ? Kind Regards Piotr Pieprzycki This configuration can cause asymmetric routing. Response for request going from LB1 to a backend server could come back to LB2. LB2 does not have any state for this response and hence will drop the packet. Without syncing all the TCP state it can lead to unpredictable results. To sync all state clustering support is needed.
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