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Asus RT-AC68U 2.4 GHz band drops and signal strength problems

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ashlux

New Around Here
I've been having problems with my new RT-AC68R/U router. I've flashed Tomato Shibby 1.28 (I had the same problems with the latest stock firmware).

First, inSSIDer shows sporadic and random drops in signal strength with the 2.4 GHz band (5 GHz band has been working great). I plugged an old Linksys WRT54GS2 and saw similar drops but not as frequent. I get similar results regardless of channel and channel widths. Here's a screenshot of what inSSIDer shows:

GV8YOKy.png


I've also had device's RSSI plummet once every couple of days on the 2.4 GHz band and the devices internet access fails to work. Every device drops to-90 dBm or worse. Devices on the 5 GHz band continue to work fine.

Finally, connection speeds sometimes start sucking on the 2.4 GHz. When this happens, I see Tomato reporting severe interference levels and really crappy rates (5.5 Mbps at times). Even when performance is acceptable, the interference level is almost always severe and around 72 Mbps. I do sometimes see similar interference levels and poor rates on the 5 GHz. I've tried turning off all devices on that side of the house with no improvement to interference.

d3yozi0.png


Just a little more information from inSSIDer on other routers in the area:

buj5cNd.png
 
Try a 20MHz channel width instead of 40MHz.

Also; remove the space in your ssid too.
 
Try a 20MHz channel width instead of 40MHz.

Also; remove the space in your ssid too.

Unfortunately I've tried 20 and 40 MHz with similar results.

What effect would the space in the ssid have? I can do that but I don't understand why it would matter.
 
This is the output of ifconfig for eth1 looks particularly bad.



root@unknown:/tmp/home/root# ifconfig
br0 Link encap:Ethernet HWaddr ---
inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2934805 errors:0 dropped:0 overruns:0 frame:0
TX packets:4759509 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:902957508 (861.1 MiB) TX bytes:6212784827 (5.7 GiB)

eth0 Link encap:Ethernet HWaddr ---
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5855006 errors:0 dropped:0 overruns:0 frame:0
TX packets:4052515 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2004490828 (1.8 GiB) TX bytes:2849586344 (2.6 GiB)
Interrupt:179 Base address:0x4000

eth1 Link encap:Ethernet HWaddr ---
UP BROADCAST RUNNING ALLMULTI MULTICAST MTU:1500 Metric:1
RX packets:2561801 errors:0 dropped:0 overruns:0 frame:6205423
TX packets:3740688 errors:4 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:927784047 (884.8 MiB) TX bytes:69083203 (65.8 MiB)
Interrupt:163

eth2 Link encap:Ethernet HWaddr ---
UP BROADCAST RUNNING ALLMULTI MULTICAST MTU:1500 Metric:1
RX packets:28237 errors:0 dropped:0 overruns:0 frame:3234
TX packets:268134 errors:1568 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:5457157 (5.2 MiB) TX bytes:46846460 (44.6 MiB)
Interrupt:169

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MULTICAST MTU:16436 Metric:1
RX packets:22873 errors:0 dropped:0 overruns:0 frame:0
TX packets:22873 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:4127543 (3.9 MiB) TX bytes:4127543 (3.9 MiB)

vlan1 Link encap:Ethernet HWaddr ---
UP BROADCAST RUNNING ALLMULTI MULTICAST MTU:1500 Metric:1
RX packets:478917 errors:0 dropped:0 overruns:0 frame:0
TX packets:1462537 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:33206159 (31.6 MiB) TX bytes:1932287636 (1.7 GiB)

vlan2 Link encap:Ethernet HWaddr ---
inet addr:XXXXXXXXXXX Bcast:72.222.125.255 Mask:255.255.254.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5376089 errors:0 dropped:0 overruns:0 frame:0
TX packets:2589978 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:6160861857 (5.7 GiB) TX bytes:917298708 (874.8 MiB)
 

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