What's new

Client dropping on 2.4GHz / Merlin 374.43 - how to debug?

  • SNBForums Code of Conduct

    SNBForums is a community for everyone, no matter what their level of experience.

    Please be tolerant and patient of others, especially newcomers. We are all here to share and learn!

    The rules are simple: Be patient, be nice, be helpful or be gone!

woolfie4real

New Around Here
I'm running the Merlin 374.43 firmware on my Asus RT-AC66u. I have both 2.4Ghz and 5GHz with a different SSID name on each.

Both are secured with WPA2-Personal / AES (using the same password).

My macbook is connected to the 5GHz network and wireless is fast and stable.

My ubuntu laptop only sees the 2.4GHz network (ok, older wireless hardware I guess) and connects for sometimes minutes or hours, but then drops and has problems to reconnect. I don't suspect the laptop as the wifi connection was rock solid when I used it with a Linksys WRT54g running DD-WRT.

How should I debug this on the router end? Are there settings I should enable/disable?

System log - wireless log shows:
SSID: "caterham24"
RSSI: 0 dBm SNR: 0 dB noise: -78 dBm Channel: 11u
BSSID: AC:22:0B:CE:90:80 Capability: ESS ShortSlot
Supported Rates: [ 1(b) 2(b) 5.5(b) 6 9 11(b) 12 18 24 36 48 54 ]
HT Capable:
Chanspec: 2.4GHz channel 9 40MHz (0x1909)
Primary channel: 11
HT Capabilities:
Supported MCS : [ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 32 ]

Mode : AP Only

Stations (flags: P=Powersave Mode, S=Short GI, T=STBC, A=Associated, U=Authenticated)
----------------------------------------
MAC IP Address Name RSSI Rx/Tx Rate Connected Flags
00:XX:XX:XX:XX:XX 192.168.1.114 Wii 7dBm 48/54 Mbps 18:39:18 AU
 
What does the system log show?

Also, you should have the 2.4 on 20MHz only.
 
Thanks for the quick reply. I have changed the 2.4GHz to 20MHz only. The ubuntu machine was then able to connect straight away, so hopefully that is it?

System log shows"

Code:
Jul 12 13:30:44 rc_service: httpd 596:notify_rc restart_wireless
Jul 12 13:30:48 kernel: device eth1 left promiscuous mode
Jul 12 13:30:48 kernel: br0: port 2(eth1) entering disabled state
Jul 12 13:30:48 kernel: device eth2 left promiscuous mode
Jul 12 13:30:48 kernel: br0: port 3(eth2) entering disabled state
Jul 12 13:30:53 kernel: wl_module_init: passivemode set to 0x0
Jul 12 13:30:53 kernel: eth1: Broadcom BCM4331 802.11 Wireless Controller 6.30.163.2002 (r382208)
Jul 12 13:30:53 kernel: eth2: Broadcom BCM4360 802.11 Wireless Controller 6.30.163.2002 (r382208)
Jul 12 13:30:53 kernel: vlan1: dev_set_promiscuity(master, -1)
Jul 12 13:30:54 kernel: device eth1 entered promiscuous mode
Jul 12 13:30:54 kernel: br0: port 2(eth1) entering listening state
Jul 12 13:30:54 kernel: br0: port 2(eth1) entering learning state
Jul 12 13:30:54 kernel: wlc_phy_cal_init_acphy: NOT Implemented
Jul 12 13:30:54 kernel: br0: topology change detected, propagating
Jul 12 13:30:54 kernel: br0: port 2(eth1) entering forwarding state
Jul 12 13:30:54 kernel: device eth2 entered promiscuous mode
Jul 12 13:30:54 kernel: br0: port 3(eth2) entering listening state
Jul 12 13:30:54 kernel: br0: port 3(eth2) entering learning state
Jul 12 13:30:54 kernel: br0: topology change detected, propagating
Jul 12 13:30:54 kernel: br0: port 3(eth2) entering forwarding state
Jul 12 13:31:01 dnsmasq-dhcp[1262]: DHCPREQUEST(br0) 192.168.1.44 e8:39:df:f5:XX:XX  # <-- the ubuntu laptop 
Jul 12 13:31:01 dnsmasq-dhcp[1262]: DHCPACK(br0) 192.168.1.44 e8:39:df:f5:XX:XX mercury
Jul 12 13:31:03 dnsmasq-dhcp[1262]: DHCPREQUEST(br0) 192.168.1.113 54:26:96:da:XX:XX # <-- the macbook 
Jul 12 13:31:03 dnsmasq-dhcp[1262]: DHCPACK(br0) 192.168.1.113 54:26:96:da:XX:XX MBP

I'll see how it goes now that I'm running the 20MHz only. Hopefully that fixes it... but I'll post again if it doesn't!
 

Sign Up For SNBForums Daily Digest

Get an update of what's new every day delivered to your mailbox. Sign up here!
Top