5508 mDNS (Bonjour Gateway) Communication Error

Hi all,
I have configured mDNS on my 5508 controller for AirPrint but clients are experiencing communication errors when trying to print to the device. I believe the config is accurate on the controller (8.0.100.0) and the device is visible:
Global multicast mode and IGMP snooping enabled
AP multicast mode (multicast): 224.0.0.251 (i'm not 100% sure this multicast address should be used according to a config document I have read)
Default mdns profile has been added to a single interface (which is a member of an interface group)
P2P blocking is disabled
Switch config:
ip multicast routing enabled and pim sparse-mode enabled under the vlan interface.
Any suggestion would be most welcome.
Thanks.

Your multicast should be changed to 239.x.x.x, which maybe use the last three octets of your wlc management ip. Make sure that you have both AppleTV and AirTunes enabled for bonjour services (for Mirror), but make sure you have the specific services for that printer. Make sure mDNS Global Snooping is also enabled. This is really all you need as long as nothing is blocking bonjour. You should also see the devices in the mDNS Domain Names.
Scott

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Is it possible to support wired mDNS across sites?
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Hub site hosts the 5508 that services the hub site and 2 spoke sites separated by L3 routing.
The hub site contains the wireless subnets (Layer 2 trunk).
Hub site has wired Apple TVs that the wireless ssids need access to.
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I think I found my answer. Has anyone actually done this?
mDNS AP
The mDNS AP feature allows the controller to have visibility of wired service providers that are on VLANs that are not visible to the
controller. You can configure any AP as an mDNS AP and enable the AP to forward mDNS packets to the controller. VLAN visibility on the
controller is achieved by APs that forward the mDNS advertisements to the controller. The mDNS packets between the AP and the controller
are forwarded in Control and Provisioning of Wireless Access Points (CAPWAP) data tunnel that is similar to the mDNS packets from a
wireless client. Only CAPWAP v4 tunnels are supported. APs can be in either the access port or the trunk port to learn the mDNS packets
from the wired side and forward them to the controller.
You can use the configurable knob that is provided on the controller to start or stop mDNS packet forwarding from a specific AP. You can
also use this configuration to specify the VLANs from which the AP should snoop the mDNS advertisements from the wired side. The maximum
number of VLANs that an AP can snoop is 10.
If the AP is in the access port, you should not configure any VLANs on the AP to snoop. The AP sends untagged packets when a query is to be
sent. When an mDNS advertisement is received by the mDNS AP, the VLAN information is not passed on to the controller. The service
provider's VLAN that is learned through the mDNS AP's access VLAN is maintained as 0 in the controller.
By default, the mDNS AP snoops in native VLAN. When an mDNS AP is enabled, native VLAN snooping is enabled by default and the VLAN
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The mDNS AP feature is supported only on local mode and monitor mode APs.
The mDNS AP configuration is retained on those mDNS APs even if global mDNs snooping is disabled.

CSCuh52683 - Bonjour mDNS proxy print servers not supported on mDNS Bonjour Gateway

Since 3rd party print servers are not supported. The question becomes what print servers do you recommend and are supported?

I moved this to the more appropriate "Mac OS X Technologies > Networking and the Web" forum, since it's become apparent that it involves more than Time Capsules.

WLC 5508 -7.4.100 mDNS Bonjour snooping

Hello
Have 7.4 installed and configured for Bonjour Snooping. All is working, but working too well. We have a large campus that house 2 schools and each school is complaining that they can see the other schools AppleTV devices.
I have played around with a few different scenarios to see if I can localize the bonjour traffic.
I guess I am looking to create a logical split for bonjour devices amoung the schools.
Apple came to the school and informed us that the IPAD has a limit of 64 devices that can be seen via the bonjour. At some point we will have over 100 AppleTV added.
so we have 3 wlc 5508's with 7.4.100
we have 2 SSIDs that span the whole campus
using AP groups to segment the floors in buildings
So the schools are logically split with AP groups
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I assign the mDNS profiles to the interfaces dedicated each school
enable snooping on the WLAN with profile of none
The end result is that devices from both schools can be seen.
I tried to create new ssid for apple TVs and a new ssid for 1 schools teachers
I followed the vlan select example
http://www.cisco.com/en/US/products/hw/wireless/ps4570/products_tech_note09186a0080bb1d7c.shtml
end result is that devices from both schools can be seen
I have tried the mDNS without multicast enabled just like the video shows to no avail - I assume maybe my AP groups might be more complicated then the example of just 2 vlans
https://supportforums.cisco.com/community/netpro/wireless-mobility/begin-wireless/blog/2013/01/01/wireless-lan-controller-wlc-release-74--bonjour-gateway-configuration-example
I have tried combinations of things, but I must be missing something
In the webinar, Cisco said it will use filtering to restrict which clients can see which services (Apple TV's, etc). What will Cisco use to filter Bonjour requests?
according to this article
http://www.pcadvisor.co.uk/news/network-wifi/3376119/cisco-answers-user-questions-about-upcoming-apple-bonjour-gateway/#ixzz2SIDqFH49
The filtering options are: · Per WLAN/SSID · Per VLAN or AP Group · Per Interface Group (which is a group of VLANs pooled together).
A Bonjour service policy can be created and applied on any one of the above criteria. In the future, we will support per-user Bonjour service policies which will come as a RADIUS attribute from the AAA server.
Read more: http://www.pcadvisor.co.uk/news/network-wifi/3376119/cisco-answers-user-questions-about-upcoming-apple-bonjour-gateway/#ixzz2SZqMYpdh
Cheers
Any insight would be appreciated

Here are the ACLs for the controller
acl create BlockBonjour
acl apply BlockBonjour
acl counter start
acl rule add BlockBonjour 1
acl rule add BlockBonjour 2
acl rule action BlockBonjour 1 deny
acl rule action BlockBonjour 2 permit
acl rule destination address BlockBonjour 1 224.0.0.251 255.255.255.255
acl rule destination address BlockBonjour 2 0.0.0.0 0.0.0.0
acl rule destination port range BlockBonjour 1 0 65535
acl rule destination port range BlockBonjour 2 0 65535
acl rule source address BlockBonjour 1 0.0.0.0 0.0.0.0
acl rule source address BlockBonjour 2 0.0.0.0 0.0.0.0
acl rule source port range BlockBonjour 1 0 65535
acl rule source port range BlockBonjour 2 0 65535
acl rule direction BlockBonjour 1 In
acl rule direction BlockBonjour 2 Any
acl rule dscp BlockBonjour 1 Any
acl rule dscp BlockBonjour 2 Any
acl rule protocol BlockBonjour 1 Any
acl rule protocol BlockBonjour 2 Any
acl apply BlockBonjour ipv6 acl create BlockAllIPv6
ipv6 acl apply BlockAllIPv6
ipv6 acl rule add BlockAllIPv6 1
ipv6 acl rule action BlockAllIPv6 1 deny
ipv6 acl rule destination address BlockAllIPv6 1 :: 0
ipv6 acl rule destination port range BlockAllIPv6 1 0 65535
ipv6 acl rule source address BlockAllIPv6 1 :: 0
ipv6 acl rule source port range BlockAllIPv6 1 0 65535
ipv6 acl rule direction BlockAllIPv6 1 Any
ipv6 acl rule dscp BlockAllIPv6 1 Any
ipv6 acl rule protocol BlockAllIPv6 1 Any
ipv6 acl apply BlockAllIPv6
Apply to wlan: The wlan index is used in this case, the first wlan created on controller
wlan acl 1 BlockBonjour
wlan ipv6 acl 1 BlockAllIPv6

Communication error with bonjour (Epson C84) printer

I'm trying to print to a bonjour printer when a dialog box pops up saying "Communication error". Has anyone else experienced this or know of a fix?

Looks like your printer driver is trying to talk to the printer... which it can't becuase it's not connected to the computer.
A lot of printer drivers try to communicate with the printer to get back things like Ink Levels and stuff. This communication will not pass to the printer through bonjour if the driver was designed to communicate through USB.
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Bonjour Gateway - Airplay / AirServer - Random Disconnects

I am experiencing random disconnects during an Airplay session to AirServer. Airserver disappears from the screen and Airplay session is gone. Here is the details of my setup:
WLC 5508 7.5.102.0
1142n APs
AirServer (1.9.4) installed on wired PCs.
Wireless clients (iOS Devices 7.x and 6.x) use Airplay to mirror to the PCs running AirServer.
APs are in mDNS mode and snooping the vlan the PCs reside in.
Wireless clients in separate BYOD WLAN.
Enabled bonjour gateway and mDNS AP (trunk mode)
http://www.cisco.com/en/US/docs/wireless/technology/bonjour/7.5/Bonjour_Gateway_Phase-2_WLC_software_release_7.5.html#wp44311
Enabled videostream
http://www.cisco.com/en/US/products/ps10315/products_tech_note09186a0080b6e11e.shtml
Verified via packet capture the client traffic is being marked for QoS (and Gold enabled on BYOD WLAN)
Differentiated Services Field: 0x80 (DSCP 0x20: Class Selector 4; ECN: 0x00: Not-ECT (Not ECN-Capable Transport))
This is an intermittent issue. I can play a YouTube video for 60 mins with no issues sometimes. Sometimes the disconnect happens. WLC mdns error debug output does not look significantly different when the crash happens.
Any thoughts? Similar experience?

Alright, long story short: Got a wirless repeater, set the printer up to connect wireless, now everything works fine, including AirPrint.
Btw.: Even though it says it is not possible, it is actually possible to access the printer via WLAN and LAN (wired) simultaneosly.
Thanks anyway. I think this can be marked as solved

Printer communication error and cannot add a new printer

I was happily using my Epson Artisan 810 printer this morning, connected wirelessly to my iMac. All of a sudden I cannot print, get "Communication Error". Checked Epson's website, no luck there. Re-checked my wireless settings on the printer itself and re-confirmed them, it will print test pages from the printer, but still not communicating with the iMac. I thought that removing the printer and then adding it back in might help, but now I cannot add any printer at all.
I resorted to my MacBook Pro, and now have the same problem with this as well.
Any ideas please? What else can I check. My internet and so on are fine. The printer itself shows the wireless icon and says the reception is excellent on the printout it produced.
Thanks so much!
L.

It would be unusual for only Bonjour to stop working in the printer. The more likely is that the printer is set to a different network subnet to that for your Mac or, as you mentioned, something like a firewall is blocking it.
The IP addressing is the most common cause. If there is a process to view or print the network settings for the Epson, then this will show what IP address range it has, which should be the same as your Mac. With the IP address, there will be four sets of numbers. For a typical home network, the first three sets are known as the IP subnet, while the last set is the network address. For example, a device with an IP address of 10.0.1.5, has an IP subnet of 10.0.1 and a network address of 5. For your Mac to 'see' the printer, both devices would need the same IP subnet, while having a different network address. So if you can check what IP address the Epson has, you may find it is using a different IP subnet to your Mac.

Communications error while trying to print

I am unable to print to my Epson R380 after installing Leopard. The printer is set up as a Bonjour printer using a airport extreme. The paper will load and print starts but stops after a line or two prints. The error given is a Communications Error. I have tried printing photo's from Lightroom, Abobe Elements, Text editor and MS Word. The same results with all.
Thanks,
Jim G.

The good news is that you have done everything right so far.
In the process you reset the printer system so you have an empty box with no printers. Just like when you got it from the store. Basically you have to install the printer just like you did the first time you used it.
In the printer & Fax dialog box click the "+" beneath the empty printer list and start adding your printer(s) back in. You should find them under the "Default Printer" tab if the printer(s) is plugged into your Mac. Just click what you want mounted / installed.
It might seem odd but Henry's process shouldn't have actually deleted any of the drivers from the system. Especially yours because you have a driver that is built into the operating system.
As for the Print prefs folder, it just had the ... Personal printing preferences you might have set such as setting default paper to "Glossy" or default paper size or Black and white instead of color or Roll feed instead of sheet feed. You know ... all those options you have when you want to print something.
I think you will be OK. It might be a good idea to shut down the system, plug in the printer(s) and restart the system so OS-X knows they are there.
I have about 5 printers and while it's tedious to have to re-mount the printers after a Print system reset, it does seem to clean up everything, inclusing old pending and failed print jobs that might have been the problem to begin with.
If that doesn't work, post again with the results or messages and we'll see if we can figure it out.
Good luck!

"communication error" when trying to print on an EPSON Stylus Photo R360

I have set up the printer on my n-basestation. It's visible through Bonjour. All drivers are installed, and Macbook Pro restarted. But, when I try to print my mac gives a "communication error" and nothing happens on the printer.
I then installed Gutenprint (V5.0.0), deleted the printer in Print Setup and re-set it up using this driver. But, now it just spits out many many blank pages. A manual shutdown of the printer is the only way to stop the post-massacre of a rainforest.
What do to? This is very very frustrating...

For the record, I have successfully been able to print with the printer connected straight to the Macbook.
Is the new 7.1.1 firmware going to do magic?

Communication error in BEx 7.0

Hi all,
We use the BI 7.0 for a week (SP 14). In the BEx Analyzer (SAPGUI 6.40 SP 25, BI Add-on 7.0, SP1401, Revision 801) an error window came up quite often saying that severe error happened and the program need to be closed, detail in the system log. Then the query/workbook closed and the user has to logon again.
In the system log we can see the followings.
R4 9 Communication error, CPIC return code 020, SAP return code 223
R5 A > Conversation ID: 48065065
R6 4 > CPI-C function: CMSEND(SAP)
Q0 I Operating system call recv failed (error no. 10054)
S2 3 Connection to CPI-C client 606 was closed
S7 4 > Partner LU name:
S0 R > Host: 10.1.101.31
S0 I > Partner TP Name: BEXANALY
We don't have any network problem, the error happen just since the upgrade.
Does anyone have any idea how to avoid this error?
Thanks,
Gabor
Message was edited by:
        Gábor Szécsi

No, answer, but som ekind of soultion. Changing the gw/cpic_timeout and other gateway-related profile paramters the problem doesn't arise so often.
We had the following parameters:
gw/cpic_timeout             100
gw/max_sys                  1000
gw/max_overflow_size    100000000
gw/conn_disconnect       2700
gw/max_conn                2000
gw/so_keepalive             1
Note, that the BI 7.0 BeX require huge amount of mem and powerfull CPU on the frontend side, as well. This also helps.
Rgds,
Gábor

I can't see my Canon MG5220 printer... Initially I was getting "there is a communication error" so I rebooted everything, reset the printing system, reinstalled the driver and still NO luck! It seems to see the scanner, but never the printer. HELP!

I can't see my Canon MG5220 printer... Initially I was getting "there is a communication error" so I rebooted everything, reset the printing system, reinstalled the driver and still NO luck! I see no printers available in the Print & Scan area. If I click "+" it seems to see the scanner, but never the printer. HELP!

The printer component uses a different protocol to advertise itself on the network compared to the scanner component and it can take several seconds longer to appear after the scanner has.
That said, with the introduction of AirPrint, the MG should be seen as Bonjour Multifunction in the Add Printer window, as shown below.
Selecting this Bonjour Multifunction entry will create a printer using AirPrint and a scanner using the iCA driver.
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Bonjour Gateway on 7.4

I work in a k-12 school district and we have around 100 ipads, 10 apple tvs, a half dozen air print capable printers, and about 300 mac computers.
I'm running vwlc 7.4 with fifty 3602i ap's.
I'm unable to get the mdns / bonjour gatway to work. I have it enabled it, added the different services I want, and enabled the profiles on the wlans.
I have followed the guide @ http://www.cisco.com/en/US/docs/wireless/technology/bonjour/Bonjour_DG_Guide.pdf which seems pretty simple.
Is there anything I need to do to my switches? Do I need to enable multicast or pim?
I have the ipads and the apple tvs on the same subnet/vlan. It seems to flap. Sometimes when I try to airplay from a ipad, the apple tvs will show up right away. The next time they won't (this is most of the time).
I also have a imac that has apple remote desktop installed. If the imac is on the wired network, it can pull up all the other computers that are on the wired network with it, but no wireless clients. When I put the imac onto the wireless network along with the other wirless mac's, apple remote desktop does not pull up any clients from either the wired or wireless.
Non of the ipads can see any of the air print pinters on my wired network.
Is there something more I need to do on my switching, or shouldn't the bounjour gateway take care of this?

#Display the Multicast config, try with Multicast mode Unicast.
#mDNS does two things
a) Eliminate Multicast Routing being enabled on Wired side when WLC and AP on different subnet to avoid Multicast capwap routing.
b) Voluntarily display the Bonjour services on other wired/wireless vlan based on the configuration.
#Rules, Limitations and Guidelines when using Multicasting on Wireless Controller.
https://supportforums.cisco.com/docs/DOC-32337
#Multicast mode Multicast is for wireless Multicast traffic efficiency on capwap only(btw WLC to AP) and it doesn't affect the actual Multicast traffic and with mDNS, M-M mode is optional and can also say it is of not much use because only Bonjour Discovery is Multicast and real data connection is P2P tcp unicast.

Client isolation and the Bonjour gateway on WLC 7.4.1

Hi,
I am considering upgrading our 5508 WLCs to version 7.4.1 to take advantage of the Bonjour gateway. What I want to do is allow clients on our guest wireless network to access things like the Apple TV in our conference rooms. My intention would be to have the Apple TVs on a separate vlan. Obviously, the Bonjour gateway would allow for access between these 2 networks. The question I have is this. If I have client isolation turned on my guest wireless network, is it still possible for these devices to access Apple TVs on another network?
Any and all information is appreciated!
Thanks!

If the Apple TV on the wireless lan , that wont work.
here is the reference:
http://www.cisco.com/en/US/products/hw/wireless/ps4570/products_tech_note09186a0080bb1d7c.shtml
please make sure to rate correct answers

Wlc 5508 multicast/bonjour

hello,
i have a wlc 5508 with code 7.0.220, with multicast enabled in it and on the lan too.I am having a bit of confusion getting bonjour to work on the wireless side. Looking at some of the cisco docs, i still have some questions on how to get it working in my specific enviroment.
I have the wlc conected to the lan via a port-channel. 2 wlan (ssid1 and ssid2) each wlan maps to a specific vlan (dynamic int), the management int (also used for dynamic ap-manager) on a third vlan (vlan x).
The requirement:
I need to get Bonjour working between ssid1 and vlan-x, so my wireless clients (in ssid1 can use bonjour with their laptops) can synch between wireless and wired. I know that you can do this within the same wlan (ssid) but in this case, when a user has a laptop wired into the network he cant comunicate to the wireless device. I read about Vlan Select and Multicast Optimization however, from what i understand i need to setup an interface group and just assign my wlan1 and management int to it, correct?
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Another scenario that may come into play would also be when or if i need a different segment (vlan y) in my lan to also "bonjour" with ssid1? For this i assume i would need to create a dynamic interface on the wlc using the same IP segment and do the a new interface group?
thanks in advance

Cisco answers user questions about upcoming Apple Bonjour Gateway
How specific can you be about the beta release of the Gateway?
Beta for the v7.4 release will be in Oct/Nov of this year [2012].
[RECORDING]Better Application Device Visibility With Cisco’s Bonjour Gateway-20120724 1704-1

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Hello,
I am trying to checkout and also to checkin files within the DMS via web service. The files are stored in the VAULT (=TRESOR) without the data server parth and DVA computer.
For checkout:
Original zum Ändern auschecken
CALL FUNCTION 'BAPI_DOCUMENT_CHECKOUTMODIFY2'
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      documentnumber = pi_documentnumber
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and for checkin:
Dokument einchecken
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-> Vault with DVA -> ** Start FTP on the client
CALL FUNCTION 'SYSTEM_START_REG_SERVER'
       EXPORTING: progname    = 'sapftp'
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Regards
Jens

Hi! As mentioned below I had the same problem.
There are two notes concerning security setting of the SAP Gateway:
1069911 - GW: Changes to the ACL list of the gateway (reginfo)
1480644 - gw/acl_mode versus gw/reg_no_conn_info
Your basis team should check if the Gateway settings allow external programs to register on the gateway.
Best regards
Dominik

5508 mDNS (Bonjour Gateway) Communication Error

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