L2 device not broadcasting in SD Access enabled switches

[Asfandyar70754]

Hi,

So we have recently deployed DNA center in our network and are facing some L2 Multicast/Broadcast issue.

We have Background music Transmitters and Amplifiers connected to our switches. Now the Amplifiers/speakers connected on the same switch as Transmitter are working fine but Amplifiers/Speakers on other switches are not working for some reason, we have enabled L2 flooding for this specific vlan from DNA center but still no luck,

Can someone please advice.

[Andrii Oliinyk]

hi

did u enable multicast in underlay as mentioned in note to L2 flooding?

Note	Layer 2 flooding requires underlay multicast, which is configured during LAN automation. If you do not provision the underlay through LAN automation, configure underlay multicast manually.

[Asfandyar70754]

This is the command to do right, ip pim rp-address 

And this commands needs to run on all switches right?

[Andrii Oliinyk]

it's not enough. actually SD-Access has MC-deployment workflow which promise is automation of needed configuration on overlay (not sure about underlay though - never deployed MC in sd-access previously)

take a look here for better assistance (1st URL provide hints for diagnosis via CLI, also notice PDF at the end of article - it gives more details on the config in both underlay & overlay):
Cisco SD-Access Multicast - Cisco Community
PowerPoint Presentation (vulcan-video.s3.amazonaws.com)
if after deployment your verifications of MC-states in overlay & underlay on FEs & RP (maybe SSM in overlay will be more suitable for your app thus allowing u to skip RP-definition step) deviates from expected output u will need to fix stuff manually via day-N Network templates.