Airplay streams drop/skip when clients roam between Lightweight APs

Hello,
We are currently running a WLC2106 w/ 3 1131 APs and in areas where coverage over laps our client airplay streams are skipping. I think this is caused when the client (iphone/ipad) switches APs. All ap's are setup in local mode and should support fast roaming correct? I am thinking the multi-cast settings are not properly setup or my ap is not configured correctly?
Controller --> General Ap Multicast mode = multicast w/ 239.0.0.0 group address, broadcast forwarding enabled.
enable global multicast mode, and enable igmp snooping are both checked.
Data rates on apps 1-11mbps disabled, 12 mandatory and all greater rates supported. P2p blocking action disabled
Thanks for the help!

We have two WLANS one with WPA2 PSK the other with WPA2 Auth 802.1X. The airplay devices are on the WPA2 SSID and the clients on the 802.1x, both go to the same vlan. Should I move all clients to the WPA2 SSID?
Thanks for the response,
David

Similar Messages

Voice gaps in cisco ip phones 7921 when roaming between cisco APs

The following problem is faced when cisco ip phones 7921 are roaming between APs:
When a call is establishedon wireless ip phones, and the phones are roaming between APs, a three seconds gap appears but the call doesn't disconnect.
The following log messages are displayed on both APs:
The first AP:
*Mar 1 23:30:30.493: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating Station 001e.4a3f.c5b8 Reason: Sending station has left the BSS
*Mar 1 23:30:30.956: %DOT11-4-MAXRETRIES: Packet to client 001e.4a3f.c5b8 reached max retries, removing the client
*Mar 1 23:30:30.957: Client 001e.4a3f.c5b8 failed: reached maximum retries
The second AP:
*Mar 1 23:33:40.049: %DOT11-6-ASSOC: Interface Dot11Radio0, Station SEP001E4A3FC5B8 001e.4a3f.c5b8 Associated KEY_MGMT[WPA PSK]
What can be the problem?
Thanks

That above error message is frequently associated with another error message "%DOT11-6- DISASSOC: Interface Dot11Radio0, Deauthenticating Station
Reason: Sending station has left the BSS ". This occurs because of the Interference from the adjacent access point. So change the channel and adjust the excessive power on the access points so that there is no too much overlap on the access points coverage cells.

WLC Client Roaming Between APs

I have a single WLC with AP1231's. I have clients associating to one AP, but they are not always re-associating to an alternate AP as always desired when roaming to an alternate location. Is there a way to adjust how clients associate to an alternate AP based on better signal strength of a closer AP?

The best place to look for the commands, is in the command reference for your specific version as they do vary quite a bit from version to version.
There are also client settings on the adaptor which dictate how the client behaves, on the Intel client you can change the conditions which cause the client to roam, I am also assuming that you have good wireless coverage otherwise the clients will tend to stick to the one cell, there are various settings on the controller to adjust for performance and coverage, there is one setting which says it can adjust the power settings on the client, I would check the notebook supplied as I recently did worth with an IBM which required a patch.
On the Intel client under advance there is a setting called ?Roaming Aggressiveness?
Best of luck

Client Roaming Within Single WLC with Different AP Groups

I am trying to setup a 4400 WLC with 2 different AP Groups mapped to its respective Dynamic Interfaces / Vlans. AP's are equally mapped to both the AP groups by Floor wise ex: First floor AP's connect to one AP group and the Second Floor AP's connecting to other AP group.
Goal is to create separate Network policy for each Floor using ACL's and apply to their respective Vlans on Layer 3 Switch. Wireless Raoming should happen seamlessly between these Ap groups making the DHCP changes by not disconnecting and connecting every time user roam across the Floors.
Problem is When Clients Roam between Floors i,e moving between AP Groups, they still maintain their old DHCP IP addresses when moved to new AP group even after Client re-authetication. This defies our goal of creating a Wireless Network Policy using single WLC.
Knobs i have tuned in WLC to acheive our goal includes....
1. WLAN Session Timeout - No use
2. DHCP Proxy Disable - No Use
3. ARP Time out - No use
Looks like WLC is storing the IP address and MAC information of the Client unconditonally during roaming and clearing out untill a manual or forced disconnect or disassociation is done.
Did anyone tried to implement this setup and made it running? Any help or suggestion would be higly appreciated.
Thanks
Guru

abit late for a reply but....try going to the SSID>Advanced and ticking the "DHCP Addr. Assignment" Required checkbox and test again.
What does the DHCP Required field under a WLAN signify?
A. DHCP Required is an option that can be enabled for a WLAN. It necessitates that all clients that associate to that particular WLAN obtain IP addresses through DHCP. Clients with static IP addresses are not allowed to associate to the WLAN. This option is found under the Advanced tab of a WLAN. WLC allows the traffic to/from a client only if its IP address is present in the MSCB table of the WLC. WLC records the IP address of a client during its DHCP Request or DHCP Renew. This requires that a client renews its IP address every time it re-associates to the WLC because every time the client disassociates as a part of its roam process or session timeout, its entry is erased from the MSCB table. The client must again re-authenticate and reassociate to the WLC, which again makes the client entry in the table.

How to improve client handover and roaming between AP's

Improving client Handover and roaming between APs
There are a few standards and methodologies available to use to improve handover of clients between APs. Most are focused on VOIP technologies, but it must always be remembered that we cannot control the client Handover (especially with legacy clients) we can only encourage them. Some Standards and methods work well for some environments and some do not - test the recommendations extensively before implementing in a live Production environment. It must also be noted that all settings take effect immediately once applied, however from a client perspective it might need to re-associate for the changes to take effect client side.
As with everything else in IT, if a perfect method/solution existed there would only be one - try them all and keep the best.
The Standards and Definitions
802.11k
IEEE 802.11k allows a device to quickly identify nearby APs that are available for roaming. When the signal strength of the current AP weakens and the device needs to roam to a new AP, it will already know the best candidate AP with which to connect to.
802.11r
IEEE 802.11r specifies fast Basic Service Set (BSS) transitions between access points by redefining the security key negotiation protocol, allowing both the negotiation and requests for wireless resources to occur in parallel.
When a device roams from one AP to another on the same network, 802.11r streamlines the authentication process. BSS allows a devices to associate with APs more quickly. Coupled with 802.11k's ability to quickly identify the target AP, BSS's faster association method may enhance application performance.
Handoff Assist
The AP monitors the RSSI for every associated client. If the RSSI for a specific client falls below "low-rssi-threshold" and continues to fall for the "rssi-falloff-wait-time", then the AP will send a de-auth to the client.
The de-auth is meant to kick the client away from the current AP and get it to re-authenticate to a nearby AP. This will have the effect of helping a client handover between 2 APs.
BUT (Big But), if the client gets de-authed and takes a while to re-authenticate (if it even does re-authenticate automatically after a de-auth), then this will have the effect of destroying communication instead of helping it -- mostly found with legacy clients.
Remove Lower Transmit Rates
Removing lower transmit rates is a way to promote better roaming, BUT not all clients respond well, or even respond to it.
The practice is that the basic rates are a subset of the transmit rates. If you only want to allow speeds 9 and up, you would select only the transmit rates of 9 and up, and the basic rates of 9 and 11. If a legacy client expects the rates of 1 and 2 it will not connect.
Local Probe Threshold
Local probe Threshold prevents a client from connecting to an AP with a too low a signal - helps more with initial connection than roaming.
The local probe threshold parameter is not supposed to force clients to roam as soon as they pass near an access point with a good signal, but rather to NOT hold on to an access point with a weak signal (avoiding sticky clients).
PMK Caching
Defined by 802.11i and is a technique available for authentication between a single AP and a station. If a station has authenticated to an AP, roams away from that AP, and comes back, it does not need to perform a full authentication exchange. Only the 802.11i 4-way handshake is performed to establish transient encryption keys.
Opportunistic Key Caching (OKC)
Is a similar technique to PMK, but not defined by 802.11i, for authentication between multiple APs in a network where those APs are under common administrative control. An Aruba deployment with multiple APs under the control of a single controller is one such example. Using OKC, a station roaming to any AP in the network will not have to complete a full authentication exchange, but will instead just perform the 4-way handshake to establish transient encryption keys
Implementation and Configuration
802.11k
802.11k is configured in your VAP profile. Tick the option to “Advertise 802.11k”. There after set the Handover Trigger Feature Settings.
Tick the “Enable Handover Trigger feature” and then set RSSI threshold by specifying the -dBm level at what the hand over trigger should be sent to the client
802.11r
802.11r is configured under SSID of your VAP profile. Tick the option to “Advertise 802.11r”
HandofF Assist
Station Handoff Assist is enabled in RF Optimization under the RF Management section of AP configuration.
Tick the “Station Handoff Assist” option to enable it, next set the Low RSSI Threshold – the threshold determines above what level no deauth gets sent
Lower Transmit Rates
Transmit rates can be adjusted in the Advanced tab of SSID under your VAP profile.
Remember that the basic rates are a subset of the transmit rates. If you only want to allow speeds 9 and up, you would select only the transmit rates of 9 and up, and the basic rates of 9 and 11
Local Probe threshold
Local Probe threshold can be adjusted in the advanced tab of SSID under your VAP profile.
Depending on the density of your APs consider values between 20 and 40 -- 40 being aggressive in an AP dense area.
Deny Broadcast Probes
Denying Broadcast Probes can cause problems with Roaming especially if the SSID is hidden – leave option disabled.

Hi, thank you for the helpful guidance. I have a basic question, if the device roam from one AP to another AP with the same SSID. Is there a need of re-authentication given a) the network uses EAP based authentication; b) the network uses MAC address authentication. If there is no need of EAP re-authentication, how the 802.11 keys are moved to the new AP. Thank you very much if you could help me clarify my thought.

Roaming between mesh and non mesh and mesh AP design

Hi There,
I need some verification on the following:
- Can client roam between Mesh AP 1550 series and Non-Mesh AP?
- I have 1550 series AP to be installed and all the mounting area are with data point ready, which connects back to switch. Would configuring mesh for this outdoor units recommended, and guide on this. Current guide i am looking from cisco site is basically the AP do not have wired ethernet connection, my design here a bit different, all the AP's have wired connection back to the switch.
Kindly assist.
Thank you
Rama

I have seen and done installs like this. The advantage is that you don't have to worry about the backhaul dropping. So it's like any LAP but big chunky outdoor AP. If the RAP looses Ethernet connectivity... Well it changes to a MAP. So you can look at
It as a benefit. It's always nice to be able to have Ethernet when you can.
Sent from Cisco Technical Support iPhone App

Facebook iOS App - Video Auto-Play Interrupts Airplay Stream

Has anyone else noticed that since Facebook implemented video auto-play that if you are on wi-fi, have the FB app open, and are streaming over Airplay, that when the app encounters a video and plays, the Airplay stream drops, requiring you to restart Airplay manually?
I am guessing this was an unintended result of Facebook implementing this feature, but it's annoying. The only workarounds that I'm aware of are to change the FB app setting to only allow videos to play over wi-fi and then shutting off wi-fi on the phone, or just simply using one iDevice just for streaming and another for checking the app, but it is darned inconvenient. I reported this to FB as a bug, but I doubt that they will reverse their decision about it, unless Apple tells FB to change this.
Can Apple require Facebook to add the ability to turn off auto-play completely in the app, since the app's behavior is technically interfering with an Apple-specific system service (Airplay) in iOS?

Just as an addendum: the behavior of the FB app technically violates Apple's Human Interface Guidelines for managing audio interruptions:
https://developer.apple.com/library/ios/documentation/userexperience/conceptual/ mobilehig/Sound.html#//apple_ref/doc/uid/TP40006556-CH44-SW1
Specifically, the app does not display audio controls when the video plays, nor does it resume the existing audio stream (the Airplay stream) when the video finishes: "If your app doesn’t display any media playback controls that people can use to play or pause audio, your app should always resume previously playing audio when an audio interruption ends, regardless of whether the Should Resume flag is present."
I'm surprised that Apple didn't enforce this guideline when FB submitted the app.

Roaming between radios

Hello to all!!
I`d like to know if roaming it's possible between radios. I mean: I've some ap with radio a and b/g/n and other only with b/g/n, client roaming between them is possible??
thanks in advance!!

to add to Leo, so long as you have overlap and the SSID are configured the same, you should roam just fine between AP.
HTH,
Steve
Please remember to rate useful posts, and mark questions as answered

7920 roaming between two WLCs

hi,
- i have two WLCs 4404 and 4402 in the same mobility group and all connections seem to be ok.
- one ssid for voip.
- two 7920 phones
when i roam between the WLCs i will lose the connection.
What should i configure on the WLC??
thx

Are you doing L3 mobility?
If so, would configure the voice ssid for the same VLAN on both controllers to see if that works or not.
Of course for mobility group setup, need the mac and IP configured on each contoller in that mobility group.
Ensure that 3.02 is loaded on the 7920 phones.
Would recommend 4.0.217.0 or later for the controller version.
Refer to WLAN SRND for more info.
http://www.cisco.com/univercd/cc/td/doc/solution/emblty30.pdf

Packet drop when clients moving from one Access point to another

HI All ,
I am new to wireless . I am using WS-SVC-WISM-1-K9 wism module and using 5 Access points . When my clients are moving from one access point to another we are getting packet drops .
Kindly anyone suggest me what all configuration i need to verify on the controller for Proper client roaming so that i can resolve my issues..
Please let me know in case of any explanations requiered .
Thanks in Advance !!!
Regards
Angus

For radius authenticated SSIDs, you need WPA2-aes or wpa1-tkip-CCKM. It depends on what the client supports.
For pre-shared key, any WPA should be decent enough for roaming speed.
If you're on WEP ... no comment.
If you covered the above point, check if it's not a coverage problem. If the 2 APs coverage zone are not overlapping there will be a hole where you don't have signal and logically will have packet drops.

How to make FMS drop messages when streaming live RTMP?

Hi,
Our application requires 0 latency live video, or more precisely an interactive video, very much like a video conference applicaiton.
We currently publish an RTMP stream, carrying a VP6 encoded video to Red5 (and we are evaluating FMS and Wowza as alternatives). Our client is, of course, flash based, and contains a player that shows the video.
My question in general is how I can get the smallest possible latency when using RTMP in FMS, even when the user's network connection does not allow him/her to get the full stream (for instance, when I publish 100kbps stream and the user is limited to 80). Basically, what I would like to see in those cases is FMS drop the frames that are not the latest ones. I tried to configure FMS using this guide, but I am not sure if any of the parameters I changes shoudl do the trick. At any case, I don't get the 0 latency I am looking for.
I also noticed a columnin the clients view of the admin console named "Drops", but the tooltip says "Messages dropped by the client". I think I am looking for messages dropped by the server.
So, does FMS drop messages/frames by default when streaming RTMP and the bandwidth to client is not enough, or should I configure it to do so? How?
I am aware of the fact there are better technologies to do what I am trying to do, with adaptive/dynamic streaming. I am also trying to understand whether I have to move to such technologies or I can stick with RTMP.
Thanks.

live_recorded is only to serve your recorded files, there is no way you can record as "live" be default disables recording.

Burned iMovie .mov to DVD and it caused movie to skip/have weird transitions between scenes and sound to not match with picture. What can I do to help fix this when reburning?

Burned iMovie .mov to DVD and it caused movie to skip/have weird transitions between scenes and sound to not match with picture. What can I do to help fix this when reburning?
Movie details
QuickTime Movie
Size: 17.95 GB
Duration 17:39
2 audio channels
Codecs- Linear PCM, Apple ProRes 422, Timecode
Thanks!!

You can't use iMovie to create a video DVD - for that you need iDVD:
Why is there no iDVD on my new Mac? How do I get it and how do I install it?
https://discussions.apple.com/docs/DOC-3673
To burn a DVD with iDVD from the latest version of iMovie, you have to export the movie using the Export button and select 480p as the size. Open iDVD and start a new project, then drag that exported movie file into the iDVD menu window, avoiding any drop zones you see.

7.5.2 Update causing skipping when playing via AirPlay

Since the iOS 4 iPad update, I have been streaming music from my iPad to my AirPort Express from Pandora. There have been no issues with this until I performed the 7.5.2 update to my AX. Now, I am experiencing pretty consistent pauses/skips when trying to listen to music.
I checked my AirPort Express logs, and the only items I'm seeing that seem to be happening pretty frequently seem to be:
- Dec 18 18:51:43 Severity:5 Rotated TKIP group key.
- Dec 18 18:44:31 Severity:4 AirTunes stream from 10.0.100.11 stopped.
Anyone have any thoughts?

Interesting. I just set up a test and things to working ok for me (no skipping). Here is the test:
AirPort Express 7.5.2
iPad 4.2.1
Pandora (latest and greatest off iTunes)
My iPad sits about 7 feet from my AirPort Express. I am stream Pandora music through it (with the "Higher Quality Audio" option enable). My Express is set up for WPA2 PSK, Auto Channel and 802.11N (with b.g compatibility). I am also using Bridge mode since I am behind a NAT firewall already.
I know one difference between our setups right off the bat is you are using NAT (well at least I am assuming you are). Can you see any other differences in our configs? I would like to try an reproduce the problem, gather a wireless sniffer and send it to Apple via ADC.

I've noticed this especially when I youtube or video stream for a while. Switching between tabs takes 3-4 seconds. Definitely a memory leak! Is it a general problem or addon specific?

I've noticed this especially when I youtube or video stream for a while. Switching between tabs takes 3-4 seconds.
Definitely a memory leak! Is it a general problem or addon specific?
Also, when I try to close firefox and restart it, the process doesn'y get killed with the normal Command + Q in Mac.
I need to use Force Quit instead.

Try updating Flash. You appear to be running an older version dating from September 2010 which might be the cause of the problem. Download from http://get.adobe.com/flashplayer/
If the problem persists after updating, try running Firefox in [[Safe Mode]]. If it functions properly in that configuration, then one of your add-ons is the culprit.

ITunes 10.4.1 freeze (hang) when webradio stream drop out for any reason.

Hello,
My iTunes freeze (hang) when any webradio stream drop out for any reason; e.g. when ISP renews the IP, the radio station has limited the stream duration (as some do) per connection or wireless is cut off e.g. by closing the lid of the MacBook.
I've to force Quit then iTunes. If I wait (up to an hour for testing) no hung or crash report get generated, iTunes still stay unresponsive.
System: MacBook Pro 2011
OS: OS X 10.6.8 (Snow Leopard)
iTunes version: 10.4.1 (10)
iTunes 3rd Party add-on's: None
Any ideas out there?
Cheers - Lupunus

I will commiserate. I have this same issue. In some cases, the stream will stop and restart after 15-30 seconds; repeat. In other cases, the stream will stop, and iTunes will switch to the last radio station in that playlist. Then that station will play for a few minutes, and stop, and sometimes restart. But usually iTunes will hang (spinning beach ball) and must be force-quit.

Airplay streams drop/skip when clients roam between Lightweight APs

Similar Messages

Maybe you are looking for