¿ªÔÆÌåÓýSo two things...
L2 Multicast will always go to the querier, best practice in simple configurations IME is to have the querier on the switch hosting the majority of encoders and you may need to make sure the uplinks are sized accordingly...
Second you need to disable flooding on a STP topology change notification (TCN). I'm sitting at a hotel restaurant right now but IIRC it's" no span tcn flood" applied to every interface.
If I weren't on mobile I'd give the dissertation for why this is the default but my thumbs are tired ?
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Sent: Thursday, November 14, 2024 4:05:54 PM To: [email protected] <[email protected]> Subject: [crestron] C9300 Multicast flooding to NVXs ?
Hi,
?
I am working on a project to implement Creston NVXs, Q-Sys etc, I work on the network side so don't 100% understand all of it. We are having an issue where ports connected to NVX-D30 at random point during the day and night get flooded with traffic, overwhelming
port causing traffic to drop therefore the display flick. We can go hours with out issue, there no real pattern to when and why it occurs. Network consists C9300 connected to C9500 core where the igmp querier is. This AV kit sits on its own vlan. Snooping
and immediate leave are enabled. No matter how much QoS I put on the put it still falls over. Has anyone see this kind of this before? or has some example config in which might help? I am lost on what it could be. Any help would much appreciated.
Happy to share more logs and config. From the 9300:
Vlan 703:
-------- IGMP snooping ? ? ? ? ? ? ? ? ? ? ? : Enabled Pim Snooping ? ? ? ? ? ? ? ? ? ? ? ?: Disabled IGMPv2 immediate leave ? ? ? ? ? ? ?: Enabled Explicit host tracking ? ? ? ? ? ? ?: Enabled Multicast router learning mode ? ? ?: pim-dvmrp CGMP interoperability mode ? ? ? ? ?: IGMP_ONLY Robustness variable ? ? ? ? ? ? ? ? : 2 Last member query count ? ? ? ? ? ? : 2 Last member query interval ? ? ? ? ?: 1000 Topology change ? ? ? ? ? ? ? ? ? ? : No
IP address ? ? ? ? ? ? ? : 10.16.203.1 IGMP version ? ? ? ? ? ? : v2 Port ? ? ? ? ? ? ? ? ? ? : Po1 Max response time ? ? ? ?: 10s |
