C9800 Sonos mDNS

[RoadRunner4k]

Hi all. 

We got a customer who are trying to connect Sonos ONE SL to their IOT SSID this works fine. but when it comes to connect / cast to the devices it doesn't work. They are all connected to same WLAN / SSID on the WLC but its handed off to our Anchor controller. 

Both are C9800 with 17.9.4a  would have thought that just having mdns bridging allowed on both foreign / anchor would solve the issue. But it doesnt. the Sonos APP finds the devices but cant connect to them, 

Done some packet captures and i can see MDNS query's to (224.0.0.251 )  

Do we have to setup mdns gateway on the anchor in order to get this working ? 

[marce1000]

 - Checkout this discussion : https://www.reddit.com/r/Cisco/comments/17vjqac/sonos_and_a_9800_wlc/

 M.

[RoadRunner4k]

Thanks marce1000 i have read this thread before, but doesn't seem to bring the solution

[marce1000]

 - You may always checkout the configs of both anchor & foreign with WirelessAnalyzer ; chances are slim that it can help for this specific topic but it's worth a try : use CLI show  tech wireless ; and feed the output into Wireless Config Analyzer

                                                 Use it for both controllers!

 M.

[Rich R · Accepted solution]

The anchor scenario is discussed in the config guide at https://www.cisco.com/c/en/us/td/docs/wireless/controller/9800/17-9/config-guide/b_wl_17_9_cg/m_mdns_gateway.html#id_97319 and https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/215352-configure-and-troubleshoot-mdns-on-catal.html#toc-hId-258735693 and see also https://www.cisco.com/c/dam/en/us/td/docs/wireless/controller/9800/17-3/deployment-guide/c9800-mDNS-technical-guide-rel-17-3.pdf

[RoadRunner4k]

Enabled it this morning, and now we see clients in mDNS services. Thank you for the input