Hello,
we just replaced a site what worked with
433AH uplink and sector
433 omni(2g)+omni(5g)
sextant - other uplink for the ring topology
951-2n (or alike) to reset one of the boards

to
netmetal (922UAGS-5HPacD ROS6.25) with addon card (uplink+sector)
433gl for the omnis
450G for acting as router (maybe will replacing it with 850x2)

Everything worked fine until today.
Now the netmetal has crap thruput, even downlink and uplink. both around 10-15mbps max.
fine signals, fine datarates, fine CCQs, fine CPU load - only crap thruput.

If a user connected to Netmetal, his bwtest showed 2-10mbps (5G-Nonly, MC6 as max, 20mhz)
if connected to (other)omni, jumped to stable 20mbps. (36mbps, 5G-A, nv2)

I've tried ofcourse chaning channels - not helped.
I found that wireless queues was set to pfifo (?),so changed back to sfq, however "only hw queue" did not helped a lot.

I would be pleased to have any idea.

We have same device, same setup, same ROS version on other tower, and works well...

i am use 922UAGS-5HPacT have the same problem.
intel 7260AC connet 922UAGS-5HPacT work on a/n/ac mode 54Mbps,but work on a/n mode 270mbps.

i am use 922UAGS-5HPacT have the same problem.
intel 7260AC connet 922UAGS-5HPacT work on a/n/ac mode 54Mbps,but work on a/n mode 270mbps.

This is not quite the same problem since you're using a non-MT station, but I had to chime in here.

The Intel 7260 AC radio is a complete piece of crap. If you search the web you'll find *tons* of unhappy users and I am one of them.

I have one in my ThinkPad X1 Carbon 2014 model (2nd gen). I use a NetMetal 5 network, UNII-3, 80 MHz. When joining the network in Windows, the RB Tx PHY link stays at 54 Mbps for a long time and eventually (many minutes) may go into the 200 Mbps or higher PHY link range. When the link is mostly idle, it will eventually get into the 600-800 Mbps PHY link range. The RB Rx link goes to 866 Mbps instantly on connect, though.

The Windows driver always reports the high PHY link (e.g., 866 Mbps) even when the RB shows that to be false. Using MT BTest utility in Windows, I could not get over 20-30 Mbps Rx average, and 70 Mbps Tx average.

Doing the same test in Ubuntu Linux 14.04 and 14.10 (using wine to run BTest) results in 100-120 Mbps Rx and 110-130 Mbps Tx.

I've tried four of the more recent Windows drivers, and tweaked all available settings in the driver and on the RB, without any improvement. It's amazing to me that the Linux driver is so much more superior. Overall though, it still really sucks. I was really hopeful for much higher LAN throughput, but at least now in Linux I can max out my 75M/75M Internet connection.

I also have a Toshiba Chromebook 2 with the same radio. It's Linux-based, and I get a rock solid 83M/83M speedtest on my 75M/75M Internet connection (nice, eh?), but I don't have the ability to run BTest to test for LAN performance in Chrome OS. I'm working now on USB-booting Ubuntu to do the same tests to see if it's a problem with the ThinkPad design specifically, but the searches on the web indicate these 7260 AC problems with all brands of notebook computers and desktop adapters.

i am use 922UAGS-5HPacT have the same problem.
intel 7260AC connet 922UAGS-5HPacT work on a/n/ac mode 54Mbps,but work on a/n mode 270mbps.

This is not quite the same problem since you're using a non-MT station, but I had to chime in here.

The Intel 7260 AC radio is a complete piece of crap. If you search the web you'll find *tons* of unhappy users and I am one of them.

I have one in my ThinkPad X1 Carbon 2014 model (2nd gen). I use a NetMetal 5 network, UNII-3, 80 MHz. When joining the network in Windows, the RB Tx PHY link stays at 54 Mbps for a long time and eventually (many minutes) may go into the 200 Mbps or higher PHY link range. When the link is mostly idle, it will eventually get into the 600-800 Mbps PHY link range. The RB Rx link goes to 866 Mbps instantly on connect, though.

The Windows driver always reports the high PHY link (e.g., 866 Mbps) even when the RB shows that to be false. Using MT BTest utility in Windows, I could not get over 20-30 Mbps Rx average, and 70 Mbps Tx average.

Doing the same test in Ubuntu Linux 14.04 and 14.10 (using wine to run BTest) results in 100-120 Mbps Rx and 110-130 Mbps Tx.

I've tried four of the more recent Windows drivers, and tweaked all available settings in the driver and on the RB, without any improvement. It's amazing to me that the Linux driver is so much more superior. Overall though, it still really sucks. I was really hopeful for much higher LAN throughput, but at least now in Linux I can max out my 75M/75M Internet connection.

I also have a Toshiba Chromebook 2 with the same radio. It's Linux-based, and I get a rock solid 83M/83M speedtest on my 75M/75M Internet connection (nice, eh?), but I don't have the ability to run BTest to test for LAN performance in Chrome OS. I'm working now on USB-booting Ubuntu to do the same tests to see if it's a problem with the ThinkPad design specifically, but the searches on the web indicate these 7260 AC problems with all brands of notebook computers and desktop adapters.

thank you，i will change other ac card to test。i am the same problem as you say。

i am use 922UAGS-5HPacT have the same problem.
intel 7260AC connet 922UAGS-5HPacT work on a/n/ac mode 54Mbps,but work on a/n mode 270mbps.

This is not quite the same problem since you're using a non-MT station, but I had to chime in here.

The Intel 7260 AC radio is a complete piece of crap. If you search the web you'll find *tons* of unhappy users and I am one of them.

I have one in my ThinkPad X1 Carbon 2014 model (2nd gen). I use a NetMetal 5 network, UNII-3, 80 MHz. When joining the network in Windows, the RB Tx PHY link stays at 54 Mbps for a long time and eventually (many minutes) may go into the 200 Mbps or higher PHY link range. When the link is mostly idle, it will eventually get into the 600-800 Mbps PHY link range. The RB Rx link goes to 866 Mbps instantly on connect, though.

The Windows driver always reports the high PHY link (e.g., 866 Mbps) even when the RB shows that to be false. Using MT BTest utility in Windows, I could not get over 20-30 Mbps Rx average, and 70 Mbps Tx average.

Doing the same test in Ubuntu Linux 14.04 and 14.10 (using wine to run BTest) results in 100-120 Mbps Rx and 110-130 Mbps Tx.

I've tried four of the more recent Windows drivers, and tweaked all available settings in the driver and on the RB, without any improvement. It's amazing to me that the Linux driver is so much more superior. Overall though, it still really sucks. I was really hopeful for much higher LAN throughput, but at least now in Linux I can max out my 75M/75M Internet connection.

I also have a Toshiba Chromebook 2 with the same radio. It's Linux-based, and I get a rock solid 83M/83M speedtest on my 75M/75M Internet connection (nice, eh?), but I don't have the ability to run BTest to test for LAN performance in Chrome OS. I'm working now on USB-booting Ubuntu to do the same tests to see if it's a problem with the ThinkPad design specifically, but the searches on the web indicate these 7260 AC problems with all brands of notebook computers and desktop adapters.

thank you，i will change other ac card to test。i am the same problem as you say。

Finally ran the same Linux BTests from the Toshiba CB2 with the same radio and it's the same as the ThinkPad. Crappy Intel...