BIG-IP LTM for Exchange 2010 HUB/CAS load balancing (Single vs Dual NIC)
We plan to use BIG-IP LTM device for load balancing our 2 Exchange HUB/CAS (both roles on same server) servers. If we use single NIC on HUB/CAS servers, its DG will be BIG-IP LTM device IP. this would mean all communication From/To HUC/CAS would be via BIG-IP device.
Our concern is even traffic between HUC/CAS <--> Mailbox servers would be via LTM device. All servers are virtual and sitting on same hardware, behind single virtual switch
Our solution is use 2 NIC on HUB/CAS - 1) IP address from BIG-IP LTM segment for all user communication with DG as NIG-IP LTM device 2) IP address from normal production server farm segment (same as mailbox servers) for HB/CAS <--> Mailbox communication. No DG (Of course static routes on HUB/CAS to manage traffic for second NIC)
Question - Any downside for this setup OR any better solution?