I have been running UTM 9 at home for over a year now with no big issues. My home switch has been a Cisco 3550 fast-e based switch, and this week I upgraded to a Cisco 3560 gigabit switch (also recently got gigabit fiber to the home). I have these two interface cards in the UTM box:
eth0: D-Link System Inc DGE-528T Gigabit Ethernet Adapter
eth1: Intel Corporation 82567LM-3 Gigabit Network Connection
On the fast-e switch, everything ran fine with decent throughput as measured by speedtest sites and general observation. When I move everything to the new switch, performance tanks, and speedtest sites actually error out. Looking at the switch, I see port speeds from my computer, the UTM (inside and WAN ports), and the modem all synced at 1000/full with no errors or dropped packets. However, when I shell into the UTM CLI, I am seeing a ton of dropped packets on the inside interface. Interfaces & Routing --> QoS --> Status shows 1024 Mbps available on both interfaces, and I don't have any kind of throttling configured.
Also as info, if I bypass the UTM and go directly to the modem or the VLAN on the switch that is connected to the modem north of the UTM, speedtest results look *much* better. It appears to me that the UTM is not properly handling the interface speeds. I am on UTM 9.407-3.
Any suggestions? TIA for input.
Andy
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