MSCS uses ARP broadcasts to reset MAC addresses, but ARP broadcasts don pass routers. So what about clients behind the routers?
If the clients were behind routers, they would be using the router(s) to access the subnet where the MSCS servers were located. Accordingly, the clients would use their router (gateway) to pass the packets to the routers through whatever route (OSPF, RIP, and so on) is designated. The end result is that their packet is forwarded to a router on the same subnet as the MSCS cluster. This router’s ARP cache is consistent with the MAC address(es) that have been modified during a failover. Packets thereby get to the correct Virtual server, without the remote clients ever having seen the original ARP broadcast.
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