I started this thread on 3/24/2013. Less than 24 months later, I'm back, and more convinced than ever that 1) the RB 1100AHx2 I purchased was bad from the start and/or 2) RB hardware is of inferior quality and my experience is simply par for the course.
The problems I had with the 1100AHx2 early on were so severe that I switched to another router (not Mikrotik/RouterOS) for the time being. Once or twice I fired up the 1100 to "play" with it and become more accustomed with RouterOS. I even updated RouterOS once or twice. But the 1100 spent most of its time powered off in a climate controlled closet. In late 2014, I decommissioned a router and temporarily put the 1100 in service. It mostly performed OK, but at least twice I needed to power cycle the 1100 to restore a lost Internet connection. Then 3/4/2015, our Internet went down and power cycling the 1100 didn't help. When I looked into it, there were no link lights on port 12 (used for WAN). I removed the 1100 from service and started investigating. I connected to the serial port and powered up. Sometimes the 1100 would boot successfully, but often it would appear to hang at "jumping to kernel code." Sometimes it would reboot ("crash" is probably more accurate) on its own. I also noticed when no devices (laptop, etc) are connected to any of the 1100's Ethernet ports, its fan spins up. Connect a device to one of the Ethernet ports, and the fan spins down... Weird.
Using the serial interface, I performed a memory diagnostic and started seeing screens full of memory errors.
I eventually managed to have it booted long enough to do a RouterOS and firmware upgrade (6.20/3.18 -> 6.27/3.22).
Port 12 still doesn't work but the 1100 at least seems to be booting consistently again.
I ran another memory diagnostic after upgrading:
My understanding is the RB1100AHx2 is considered more high end and targets the enterprise market?! I feel like I threw away money on the router as it's only seen a few months of serious duty of any kind, and has performed unreliably at that. I feel gypped.
After re-configuring the router to use Port 10 for my WAN interface, the router is working again, for now, at least.
Mikrotik states that out-of-warranty service can be had for a fee, "2. MikroTik does not offer repairs for products that are not covered by warranty. Exceptions can be made for: CCR1016-12G, CCR1016-12G-BU, CCR1036-12G-4S, RB1100, RB1100AH, RB1100AHx2, RB1200, RB600, RB600A and RB800 as a paid service (fees apply)." If I wanted to have this router serviced how would I go about it and what cost could I expect?