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I got the problem when deploying 2 vEdge at HQ Site with VRRP and 1 cEdge (ISR) at Branch site, Everything can work via SD-WAN tunnel except some application etc. SAP cannot work. I tried to down 1 vEdge (VRRP Standby) at HQ Site. The result shows that everything (all application) can be used normally include SAP.
I'm not sure if there is a problem with VRRP or not?. Has anyone ever encountered problems about this.
Yes, it's common and well known problem. tcp-optimization requires flows to be symmetric.