WLAN goes down when WAN goes down

Hi
I have 4 AP with EAP enabled. The authentication servers are located globally and the authentication request goes to the server situated in another country. My problem is that when my WAN goes down my WLAN also goes down immediately. Does the AP communicte with the server even after authentication, Atleast after authentication it should keep my authenticated machines in the network
any help is appreciated
ashish gupta

if you use a Cisco ACS server, click on "Interface Configuration" and "Radius (Cisco Aironet)" Make sure that "Aironet-session-time" is checked.
Then, you can change the session timeout in user or group level.
Other ways to resolve the problem:
1. install redundant links to the site
2. configure a second radius server on all access point. The second radius server can be one of the APs locally. If you configure "radius-server deadtime ?", the AP will not communicate to the radius server for a period of time if the radius server does not respond for 3 times. Of course, you have to populate the centralize user database to a number of APs.

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MacBook WLAN goes grey and AP list becomes empty

I have 10.4.8 MacOS X and A-Link RR24AP modem/WLAN AP
After little Internet use over wireless(this is variable) WLAN goes off and icon turns grey with no AP's listed anymore. Only solution so far is to go SLEEP mode and back to ON when everything is just fine.
Even now icon is grey and I had to connect LAN cable which works just fine.
iStumbler did not help me out (WLAN goes grey even that program is running).
thanks in advance!
.hyeena

Hi,
I have the same issue on my Aug 2006 MacBook. The WLAN connection (to an ASUS router) logs in ok after startup of the Mac, but drops the connection after a while and the icon goes grey. Apple apparently has been unable to fix this despite multiple updates to WLAN since I got the machine. BTW - a DELL XPS laptop also connects via WLAN to this router and does not exhibit this problem. I personally don't think this issue has anything to do with the make of the router. There may be some timing differences when it comes to the actual air interface messaging protocol, which influence how often and how soon the connection drops, but ultimately only the Apple laptops seem to have this issue.
On the MacBook - the following two things work for me:
1) Just to get the connection back up: Turn AirPort off and then on again.
As a result the connection to the network is reestablished.
2) To keep the connection up: Start a UNIX shell and continuously ping
your local default gateway / router every three seconds or so, e.g.:
ping -i 3 192.168.2.1
Let this command run in the background as long as you need the
connection.
This puts minimal load on the WLAN connection and for me it keeps
the connection in the air while I use the Internet etc.
(Caveat: I had read before in this forum that this method does not
work for everyone. It also does not work for me, if the interval
between pings is too long. 3s does the trick though (10s for example
would not, in my case !))
Hope this helps.
Regards,
Woelund
MacBook (black, 2GB, 120GB), 4H31 Mac OS X (10.4.7) iPod Photo 60GB

Automatic shutdown of Radio when WAN goes down

I have an autonomous CISCO 877 wireless router IOS 12.4(9)T6
I want the radio to shutdown if there is no egress port -( usually ADSL but concievably Ethernet) but I can't find the commands.
I had a problem some time ago with another non-CISCO AP that was associating with local clients because they saw it as a strong signal but then couldn't route the packets because the Ethernet was down. Other nearby APs could have taken them over if its radio had been switched off.
I can't believe there isn't a way to do this but I'm looking for the commands in vain. This works a bit like a backup but instead of bringing a port up when another fails it should shut down the radio when the monitored port fails.
Sorry if this is a dumb question but I've trawled through docs and postings: maybe I'm getting the wrong keywords

Thanks Roman - exactly what I needed.
I have added the config below for anyone else who might be interested - although I only used the Ethernet Interface as a test
and have yet to try it with the ATM or dialer interfaces.
event manager applet RADOFF
event syslog pattern "Interface FastEthernet3, changed state to down"
action 1.0 cli command "en"
action 1.1 cli command "conf t"
action 1.2 cli command "int do0"
action 1.3 cli command "shut"
event manager applet RADON
event syslog pattern "Interface FastEthernet3, changed state to up"
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action 1.1 cli command "conf t"
action 1.2 cli command "int do0"
action 1.3 cli command "no shut"

Re: Satellite L650-108 WLan shuts down when lid is close

Hey, so it's all in the title people :)
I got this wireless card ; RTL8191SE. Everything is great, internet is going fast etc ...
But when I close the lid, is shuts down the internet :( which is not great when I wanna download someting pretty big
How do I fix this ?
I got the latest driver, I think : 21/05/2010 ... 2016.2.521.2010
thx

Hmm strange
Did you check the settings in device manager -> Wlan card -> Properties -> Advanced tab?
Here are also some drivers:
Realtek page:
http://www.realtek.com/downloads/downloadsView.aspx?Langid=1&PNid=21&PFid=48&Level= 5&Conn=4&DownTypeID=3&GetDown=false
Toshiba Wlan proptal:
http://aps2.toshiba-tro.de/wlan/

Wlan is down when system starts

Hello there! Im kind of new linux user and i need your help with a problem that occured
After a full system upgrade (that only package i held back was the latest kernel26) , the wlan0 interface keeps remaining down , allthough eth0 is fine with ip address assigned.
Wlan assosiates with the access point (ive got the link up , info by iwconfig) , but the interface is down with no ip address so i have to manually assign it and bring it up afterwards. A simple solution would be writing a script that brings up the iface.Any other ideas how i could fix it?
rc.conf seems fine , i havent chaned it for a while now.
eth0="eth0 192.168.1.100 netmask 255.255.255.0 broadcast 192.168.1.255"
lo="lo 127.0.0.1"
wlan0="wlan0 192.168.2.10 netmask 255.255.255.0 broadcast 192.168.2.255"
wlan_wlan0="wlan0 essid <myessid> key 0123456789 ap any"
INTERFACES=(lo eth0 wlan0)
And heres some info from the logs
Sep 3 21:37:14 archpc ADDRCONF(NETDEV_UP): wlan0: link is not ready
Sep 3 21:37:15 archpc wlan0: Initial auth_alg=0
Sep 3 21:37:15 archpc wlan0: authenticate with AP 00:15:56:b7:5d:52
Sep 3 21:37:15 archpc wlan0: RX authentication from 00:15:56:b7:5d:52 (alg=0 transaction=2 status=0)
Sep 3 21:37:15 archpc wlan0: authenticated
Sep 3 21:37:15 archpc wlan0: associate with AP 00:15:56:b7:5d:52
Sep 3 21:37:15 archpc wlan0: RX AssocResp from 00:15:56:b7:5d:52 (capab=0x471 status=0 aid=1)
Sep 3 21:37:15 archpc wlan0: associated
Sep 3 21:37:15 archpc wlan0: switched to short barker preamble (BSSID=00:15:56:b7:5d:52)
Sep 3 21:37:15 archpc ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
Sep 3 21:37:26 archpc wlan0: no IPv6 routers present
Sep 3 21:37:58 archpc wlan0: Initial auth_alg=0
Sep 3 21:37:58 archpc wlan0: authenticate with AP 00:15:56:b7:5d:52
Sep 3 21:37:58 archpc wlan0: RX authentication from 00:15:56:b7:5d:52 (alg=0 transaction=2 status=0)
Sep 3 21:37:58 archpc wlan0: authenticated
Sep 3 21:37:58 archpc wlan0: associate with AP 00:15:56:b7:5d:52
Sep 3 21:37:58 archpc wlan0: RX ReassocResp from 00:15:56:b7:5d:52 (capab=0x471 status=0 aid=1)
Sep 3 21:37:58 archpc wlan0: associated
Anything else that could help?

if you use a Cisco ACS server, click on "Interface Configuration" and "Radius (Cisco Aironet)" Make sure that "Aironet-session-time" is checked.
Then, you can change the session timeout in user or group level.
Other ways to resolve the problem:
1. install redundant links to the site
2. configure a second radius server on all access point. The second radius server can be one of the APs locally. If you configure "radius-server deadtime ?", the AP will not communicate to the radius server for a period of time if the radius server does not respond for 3 times. Of course, you have to populate the centralize user database to a number of APs.

Wireless Wlan going crazy + Power Manager AC Adapter detection issue

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ddong,
Thank you for you reply- Here are the most up-to-date versions of these programs:
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Power Manager for Windows 7 v 6.32
Lenovo Power Management Driver for Windows 7 v 1.65.05.21
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Ed
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AAA Problem when WAN is offline

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I have a problem at the moment logging into a router while the WAN is offline. TACACS+ works fine when the WAN is up but when its down i get prompted for a password which i enter and then get authorisation failed...
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aaa authentication login default group tacacs+ enable
aaa authorization config-commands
aaa authorization exec default group tacacs+
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aaa accounting commands 15 default start-stop group tacacs+
aaa accounting network default start-stop group tacacs+
aaa accounting connection default start-stop group tacacs+
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aaa authorization exec default group tacacs+ if-authenticated
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Rick

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Hi,
I purchased Toshiba Satellite L650 in April 2011 in Canada.It works perfectly fine in Canada, however when I bring the laptop to HK to use, i found the wirless lan connection drops or completely disconnected very frequently.
However, my 3 other laptops in hk doesn't have that problem.
I have
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- disable the power saving level,
- increased the the TX power lever
- did what the following link said
http://support.toshiba.ca/support/techsupport/tsbs/viewtsb.asp?docid=TSB001593
and still doesn't help.
It is really frustrated to browse when the internet is on and off.
Could someone please help?
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T

Thanx guys,
--I downloaded and install the update driver of Realtek _WLAN_driver_Win7_2.00.0013 through toshiba web site,
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T

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WLAN Controller on remote WAN?????

Hi Guys,
In the event of a WLAN controller, can the APs assosiate to a controller a thousand miles away?
The backup controller would be located in the DC where 100% of traffic is destined anyway so bandwidth is not of major concern.
Thanks

no problem - glad to help
if you read this:-
http://www.cisco.com/en/US/docs/wireless/controller/4.0/configuration/guide/c40hreap.html
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WLAN goes down when WAN goes down

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