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7 Messages

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170 Points

Fri, Jun 14, 2013 12:13 AM

Closed

Doesn't need answer

Apple Device Roaming

I am having a problem with frequent disconnects on apple devices when signal strength is great. In looking into this further, I noticed that the apple devices in question are roaming at an alarming rate. This is happening across iPad, iPod, and MacBook platforms. For example, I looked at an apartment with an iPod touch that was roaming every 30 seconds or so. There is a Win7 laptop in the same apartment that has not roamed one time. I have about 40 Apple devices on the network and similar behavior is happening on 70% of them. I have about 40 other devices on the network and this is not happening with any of them that I have looked at so far. What is more, the Apple devices are roaming out from a nearby AP to an AP several hundred feet away with a few buildings between them. The user is not leaving the apartment but the device is roaming to APs throughout the campus, even APs it either should not see at all, or just barely.

Any ideas? Has anyone seen anything like this before?

Responses

129 Messages

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1.6K Points

7 years ago

Consume with a grain of SALT:

Apple Blocks Lawrence Lessig's Comment On iOS 7 Wi-Fi Glitch
http://rss.slashdot.org/~r/Slashdot/s...
destinyland writes "A glitch in iOS7 has cost "a significant number" of Apple users their Wi-Fi access, according to ZDNet. But they also report that Apple is now censoring posts in their "Apple Support Communities" forums where users suggest possible responses to their loss of WiFi capabilities (including exercising their product warranty en masse). "We understand the desire to share experiences in your topic, 'Re: wifi greyed out after update to ios7,'" read one warning sent to Lawrence Lessig, "but because these posts are not allowed on our forums, we have removed it." Lessig — who co-founded Creative Commons (and was a board member of the Free Software Foundation) has been documenting the ongoing "comments slaughter" on his Twitter feed, drawing attention to what he says is the Borg-like behavior of Apple as a corporation. Lessig "is now part of an angry mob in Apple's forums who upgraded to iOS 7 and lost Wi-Fi connectivity," ZDNet notes, adding that as of this morning their reporter has been unable to obtain an official response from Apple."

Read more of this story at Slashdot.

shared via http://feedly.com

7 Messages

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170 Points

7 years ago

As some background to my original problem, I am using a ZD3000 with a combination of 7363 and 7762 APs (74 total).

This does appear to be resolved now for us. We did a number of things in trying to resolve it and I can't say for sure that it was one thing or another. These are the steps I took:
1) enabled 802.11d support
2) turned off client load balancing
3) statically assigned 2.4GHz channels and turned off background scanning
4) Upgraded from 9.3.x to 9.4.3.0.16 (I know that is old now)
5) Adjusted transmit power on 2.4 radios to try to reduce interference (but there really wasn't much present to begin with)

Upon doing these things, the system stabilized and has remained stable for the last 4ish months. Hope this helps.

129 Messages

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1.6K Points

Worked OK for me for 2 hours. This is better than the original 10 minutes. Client was idle the last 30 minutes of the 2 hours. Idle and grace each are set for 120.

129 Messages

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1.6K Points

JW:

Still good at your site? Let us know if you upgrade to most current general release firmware and results.

Champion

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202 Messages

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3K Points

7 years ago

I'm having excessive roaming issues with macbook air laptops.
I've got a pair of ZD3000s running the latest 9.6 code w/ about 60 APs.

In one building/complex I've got 20 zf7372 APs.
One client there has roamed over 250 times today and there's a noticible impact on connectivity every time the client roams.
(sometimes the client renews it's lease w/ the DHCP server, sometimes it doesn't bother but resumes talking on the network anyway)

This user has an AP directly outside of his office, but the macbook air continually associates to 2 other APs on different floors.

In the past I've had iOS users comment that they're continually prompted if they want to connect to the (only available) SSID.

I've also seen situations where a windows7 laptop jumps back and forth between 2.4Ghz and 5Ghz radios of the same AP. The windows machine will do this for some time before getting confused and staying associated to one radio but without connectivity.

So far Ive turned on:
smartroam 2 (used to be "5". did this to prevent "stuck client" issue)
802.1d
ofdm-only
bss-minrate
regionalization and available channels are set to "optimize for performance"
Channelization is 20 for 2.4Ghz and 40 for 5Ghz.

turned off:
background scanning

load balancing is enabled.

Still looking for a solution.

129 Messages

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1.6K Points

7 years ago

Bill Burns:

We are having similar roaming problems related to Macs.

Has Ruckus provided you any help?

Others:

Has any Mac / Ruckus customer ever have the roaming issue working regularly and successfully...maybe with an older version of ruckus firmware or older OSX/iOS?

16 Messages

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214 Points

I have one site that is pretty solid. ZD1100 with AP7363s - all current versions (and current OSX). I wish I could clone that at my second site :)

Champion

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202 Messages

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3K Points

Tech Support recommends capturing data from the client machine w/ wireshark. (along with WiFi headers)
..and simultaneously using another wireshark instance along w/ an AP as a remote capture interface.
The user with this problem was out for the day so I just spent *my* day in his office trying to replicate the problem with another macbook air but with no success.
So I have no useful data to send back to Tech Support on this problem.
Will keep on trying.

129 Messages

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1.6K Points

Smartroam at "1" did not help us.

Bill: Any more help from ruck tech support?

Champion

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202 Messages

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3K Points

I'm working w/ a good tech-support rep now. Got all my tickets transferred to this one guy. The roaming rate (at least for the macbook air machines that I've been watching) has gone down to around 10 times a day instead of 100+ times a day. I'm not sure what/which change to attribute the improvement to.
I'm still not sure about iOS/android devices.
When looking at logs, It's hard to tell the difference between a device w/ an excessive roaming problem and a user that moves around all day.

Champion

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202 Messages

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3K Points

7 years ago

I wrote this script to help me search for odd things in my ruckus logs:
https://github.com/bot779/ruckus-zdro...

Using this, I can see that the apple-branded device on my network that roamed the most yesterday had a mac address of 8c:58:77:19:4c:c9 and it roamed 192 times that day.
(it can take a long time to run)

I hope that helps someone.

683 Messages

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11K Points

Nice! Thanks for sharing!

683 Messages

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11K Points

This is a great conversation that's separate from the main topic, so I created a new topic to continue the discussion. Please reference the new topic here: Ruckus Log Search Script

Champion

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202 Messages

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3K Points

7 years ago

Here's another script. (or set of scripts?)
https://github.com/bot779/ruckusconf

"ruckusconf" will automate an ssh login and download of configs from a controller, or get a supportfile from an AP, or from a group of APs.

"buildclientos" will build a database of wifi client mac addresses and the operating systems running on those clients.

I hope to update the zdroamers script (soon-ish?) so it can use this information to display operating systems of the clients that are roaming the most.
This won't tell me if it's "macbook air" machines that roam the most, but at least I'll be able to distinguish between ios devices and laptops.

Champion

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202 Messages

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3K Points

7 years ago

The zdroamers script is now updated to display the operating systems running on clients that roam frequently.
https://github.com/bot779/ruckus-zdro...

3 Messages

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92 Points

7 years ago

I am having this same problem with MACS. I have been working with ruckus tech support for some time now. They still have not been able to come up with a good solution. The problem started occurring when I upgrade from 9.5.2 to 9.6.2. I am having this problem across multiple sites with multiple zds. Has anyone come up with a good solution?

129 Messages

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1.6K Points

Any resolution for you?

Champion

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202 Messages

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3K Points

7 years ago

I don't *think* I'm having these problems anymore.
'though I lost track of what changes heppened at what time:
I'm guessing the fix (for me) was to set the bss-minrate to 12.

note:
ofdm-only is good too.
band-steering thresholds may play-in to apple roaming as well.
I have smartroam turned on. (to deal w/ the "stuck client" issue)
smartroam *may* contribute to the problem.

129 Messages

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1.6K Points

Bill:

Would you mind giving a copy of your configuration and logs to RuckusWireless support so they can study and post some solutions ("Answers")?

Champion

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202 Messages

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3K Points

Can't dump the entire config here.
Let me know what you want to see other than the wlan config.

[email protected]/etc/admin/ruckus# ./ruckusconf --enable --command "show wlan name CSHL" $CONTROLLER_IP
spawn ssh [email protected]

Please login: admin
Password:
What is the correct access password?

Welcome to the Ruckus Wireless ZoneDirector 3000 Command Line Interface
ruckus>
ruckus> ena
ruckus# show wlan name CSHL
WLAN Service:
ID:
1:
NAME = CSHL
Tx. Rate of Management Frame(2.4GHz) = 12.0Mbps
Beacon Interval = 100ms
SSID = CSHL
Description = Production CSHL
Type = Standard Usage
Authentication = open
Encryption = none
Web Authentication = Disabled
Authentication Server = Disabled
Called-Station-Id type = wlan-bssid
Tunnel Mode = Disabled
Background Scanning = Enabled
Max. Clients = 200
Client Isolation = Local
Zero-IT Activation = Disabled
Priority = High
Load Balancing = Enabled
Rate Limiting Uplink = Disabled
Rate Limiting Downlink = Disabled
Auto-Proxy configuration:
Status = Disabled
Inactivity Timeout:
Status = Enabled
Timeout = 5 Minutes
VLAN-ID = 48
Dynamic VLAN = Disabled
Closed System = Disabled
OFDM-Only State = Enabled
Multicast Filter State = Disabled
802.11d State = Enabled
DHCP Option82 State = Disabled
Ignore unauthorized client statistic = Disabled
STA Info Extraction State = Enabled
BSS Minrate = 12.0 Mbps
Call Admission Control State = Disabled
PMK Cache Timeout= 720 minutes
PMK Cache for Reconnect= Enabled
NAS-ID Type= wlan-bssid
Roaming Acct-Interim-Update= Disabled
PAP Message Authenticator = Enabled
Send EAP-Failure = Disabled
L2/MAC = No ACLS
L3/L4/IP Address = No ACLS
L3/L4/IPv6 Address = No ACLS
Precedence = Default
Proxy ARP = Disabled
Device Policy = No ACLS
SmartRoam = Enabled Roam-factor = 4

ruckus# exit
Exit Ruckus CLI.

Connection to 143.48.126.1 closed.

129 Messages

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1.6K Points

7 years ago

It seems like RuckusWireless does not understand they have or will loose new customers because of these ROAMING problems.

We bought Ruckus party because of then current customers recommendations. If we are asked for the foreseeable future, we will push others away from Ruckus if the potential customer has a BYOD environment that includes at a minimum, MAC OSX.

683 Messages

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11K Points

7 years ago

We need everyone seeing this to open a case if you haven't already. We have only a handful now (really) and we're not getting enough data to proceed rapidly to resolution. When you open the case, or comment on an existing one, cite this post and request that the case be escalated.

I'll try to have something cohesive posted later today for possible workarounds.

129 Messages

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1.6K Points

Where did you post the "workarounds?"

Much appreciated.

3 Messages

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92 Points

The only thing I have come up with is to setup a separate ssid with layer 2 MAC filtering.

129 Messages

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1.6K Points

DC:

Was that the Ruckus support proposed workaround?

683 Messages

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11K Points

7 years ago

I'm closing the thread as this is proving unproductive.

This is not a common issue and we have yet enough diagnostics for conclusive root cause determination (@Bill's comes closest, and seems successfully resolved, but unfortunately too many variables changed simultaneously)

All of the available workarounds are posted in the thread. Please open a support case if you are seeing an issue with excessive/illogical roaming by either Apple or other devices. I have our escalation team standing by to assist.