airprint randomly stops working

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  • Updated 2 years ago
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this is a new identifi install with 4x4 APs
the legacy Meru install was working flawlessly
the airprint server disappears after an amount of time, turning the airprint server's wifi off then back on gets functionality back
multicast settings are set to allow all multicast traffic
not sure what to adjust to get airprint to continuously work

thanks!

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Joe Kozura

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Posted 2 years ago

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Ronald Dvorak, Embassador

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You should tell us a little bit more about the installation.... 
controller type, AP model, software version, setup of the WLAN service, topology used.

In case the used topology isn't bridge@AP could you give it a try with it to see whether you run into the same issue with this topology mode.
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Joe Kozura

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c35 controller, AP3935i, 10.11.03.0004, all wlans/topologies are bridged at ap

DTIM seemed pretty high to me at 5, lowered to 2.
Not sure if that will help or not.

Is there a specific setting to allow airplay / bonjour?  Perhaps disabling that and allowing all multicast traffic can fix it?

thanks for the reply
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Ronald Dvorak, Embassador

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As you already use bridge@AP the traffic isn't passed thru the WLAN controller and there is no multicast settings that could affect/stop the traffic..... beside ACLs in the role but as it's working for sometimes the rule set should be OK.

Could you check if the server is reachable via ping if the issue arise again.
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Joe Kozura

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Here is a picture from the netsight server
Not sure why it is de-registering
maybe it is a bug?  I know the newest firmware addressed the exact same issue for some other devices, maybe this is still an issue with a mac os server?

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Ronald Dvorak, Embassador

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You might see more information on the controller if you've station events enabled in > Controller > Logs > System Log Level > Report station events on controlller

If so you'd take a look in > Logs> Station Events > put in the MAC of the client in the field in the upper right corner to filter on that client

You should see the de-registration cause in the "additional detail" column.
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Ronald Dvorak, Embassador

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My wild guess .... the cause is "idle-timeout" :-)
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Joseph Burnsworth

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Ive had this happen as well. I had to turn re-key interval on and to 3600 seconds under the auth tab. The authorization becomes stale. If you roam to an AP and back it'll also "Wake" it back up.
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Joe Kozura

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awesome! We'll give this a try, got some more feedback, if the wired port on the server is unplugged it works all the time

I'll let you know what happens
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Joseph Burnsworth

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i know this has been sitting for a min and the client may have moved forward, but i am thinking about this post i must have over looked, which i apologize for.

You say that when the server is unplugged from the network, it never stops working. What configs do you have on the switch for igmpsnooping? You wouldn't happen to have fast-leave on would you?

I've had that bite me in the rear as devices that went idle would "leave" and come back with fast-leave on.
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Joe Kozura

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Joseph, the broadcast re-key interval was already on and set to 3600 seconds

Ronald, I turned on station logging but haven't snagged anything yet on that station, logs are still writing to the netsight server but doesn't give me more details, we'll see if they have anymore issues with the wired port unplugged
I'll have him plug it back in Monday to see if we can break it again

Maybe setting up a ping sensor to the server's IP will keep it alive?
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Joe Kozura

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it was reported that the printer stopped working

looking at the station logs i'm still not seeing anything on the airprint server timing out, but in the active clients view, it has been connected for over 2 days

we offered to setup a ping sensor to the airprint server to try keep alive but the customer wants to go with a different solution to allow people to print

thanks for the help guys, I'll update this thread if the customer decides to continue troubleshooting the issue
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Joseph Burnsworth

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I had one other scenario with a client and ended setting up a script to reboot the AP's every night at 2am.

Let me know if you want to take that route, I'll give you the HUB link that I created for this
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James A, Embassador

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How long after reconnecting does the AirPrint server stay visible for? You can monitor Bonjour with this command on OS X:
dns-sd -B _ipp
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Joe Kozura

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thanks for the tips guys, the customer has implemented some kind of work around, I'm sure that your suggestions will help other people in the future, I'll put an update in here if they want to revisit it.
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Ryan Mathews, Alum

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Good stuff Joe.  Thanks for joining the Hub by the way.  
Great to have you in the Extreme Community.