All,
In the months between we shutdown for COVID in March 2020 and now we have
upgraded our WLC5520 to 8.10.151.0, replaced the core routers for campus and
Resnet, and replaced some APs. Somewhere in all of these changes, users lost
the ability to connect to their Sonos and Google Home devices. The devices
connect to the network, get an IP, and try to get to the internet (thank you
netflow). But, the users cannot connect to the devices via their mobile or
laptops. When I do a packet capture on the clients, I see SSDP discovers to
239.255.255.250 and the broadcast 255.255.255.255.
Any ideas?
* ip multicast-routing is enabled on the core switch
VLAN:
* ip pim sparse-mode
* ip igmp version 3
* ip igmp explicit-tracking
WLC
* mDNS is enabled
* mDNS service strings exist
Christina Klam
Network Engineer
Institute for Advanced Study
1 Einstein Dr
Princeton, NJ 08540
(m) +1 609-751-7899
(o) +1 609-734-8154
ck...@ias.edu
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