Community discussions

MikroTik App
User avatar
Member Candidate
Member Candidate
Topic Author
Posts: 140
Joined: Fri May 28, 2004 3:26 pm
Location: Norway, Østfold

Still problems with RouterOS and Broadcom devices.

Thu Dec 13, 2012 12:48 pm

We have RB751G acting as office access points. The problem is users get disconnected from them all the time.
The connection stays up but the TC/IP traffic is cut off. You can't even ping the AP you're connected to.
I have tested and experienced this behaviour on my Macbook Pro with a Broadcom BCM43xx WLAN nic.
I was hoping this would be fixed in the latest software but unfortunately it's not.

Flags: X - disabled, R - running
0 R name="wlan1" mtu=1500 mac-address=D4:CA:6D:27:7F:BF arp=enabled interface-type=Atheros AR92xx mode=ap-bridge ssid="MySSID" frequency=2422 band=2ghz-b/g channel-width=20mhz scan-list=default
wireless-protocol=802.11 antenna-mode=ant-a wds-mode=disabled wds-default-bridge=none wds-ignore-ssid=no bridge-mode=enabled default-authentication=yes default-forwarding=yes default-ap-tx-limit=0
default-client-tx-limit=0 hide-ssid=no security-profile=crypto compression=no

1 name="crypto" mode=dynamic-keys authentication-types=wpa2-psk unicast-ciphers=aes-ccm group-ciphers=aes-ccm wpa-pre-shared-key="MySecretKey" wpa2-pre-shared-key="MySecretKey"
supplicant-identity="MySSID" eap-methods=passthrough tls-mode=no-certificates tls-certificate=none mschapv2-username="" mschapv2-password="" static-algo-0=none static-key-0="" static-algo-1=none
static-key-1="" static-algo-2=none static-key-2="" static-algo-3=none static-key-3="" static-transmit-key=key-0 static-sta-private-algo=none static-sta-private-key="" radius-mac-authentication=no
radius-mac-accounting=no radius-eap-accounting=no interim-update=0s radius-mac-format=XX:XX:XX:XX:XX:XX radius-mac-mode=as-username radius-mac-caching=disabled group-key-update=5m
management-protection=disabled management-protection-key=""
Long time Member
Long time Member
Posts: 538
Joined: Fri Jul 23, 2010 1:09 am

Re: Still problems with RouterOS and Broadcom devices.

Sat Dec 22, 2012 2:51 am

I do not see this problem with my 2010 MacBook Pro with 10.6.8. It spends the night connected to my RB751U. I transport it to work during the day, so I may just not be spending enough time connected to the MikroTik to get "lucky" with this.
  Card Type:	AirPort Extreme  (0x14E4, 0x93)
  Firmware Version:	Broadcom BCM43xx 1.0 (
  Locale:	FCC
  Country Code:	US
  Supported PHY Modes:	802.11 a/b/g/n
On the other hand, my wife's 27" iMac with 10.7.x does sometimes require its wireless interface be turned off and back on to pass traffic again. I cannot recall if we had the problem when using a Linksys WRT54G. We bought her iMac and the RB751U at close to the same time. I've just loaded 6.0rc6 on the RB751U. I have not heard of issues since then, but it has only been 2 days.
just joined
Posts: 12
Joined: Sun Feb 06, 2011 1:57 pm

Re: Still problems with RouterOS and Broadcom devices.

Tue Dec 25, 2012 6:13 pm

Not sure what iPhone 5 wireless chip is using, but I am not able to connect by it to my RB493G running 5.22. A year (or so) a go I was having the same problem with my MacBook Pro and iPhone 4. Later that was fixed and I haven't any 'apple related' problems until recently I upgraded to iPhone 5.
In log I keep getting:
16:47:06 wireless,info D8:D1:CB:EB:68:C1@WLAN_5GHz: connected 
16:47:11 wireless,info D8:D1:CB:EB:68:C1@WLAN_5GHz: disconnected, unicast key exchange timeout 
16:47:28 wireless,debug WLAN_2.4GHz: D8:D1:CB:EB:68:C1 attempts to associate 
16:47:28 wireless,debug WLAN_2.4GHz: D8:D1:CB:EB:68:C1 not in local ACL, by default accept 
16:47:28 wireless,info D8:D1:CB:EB:68:C1@WLAN_2.4GHz: connected 
16:47:33 wireless,info D8:D1:CB:EB:68:C1@WLAN_2.4GHz: disconnected, unicast key exchange timeout 

Who is online

Users browsing this forum: Baidu [Spider], Bing [Bot], pnam2kx and 130 guests