How to use more than 32 downstream subnets for multicast routes (e.g. smcroute or igmpproxy)?

For Developers
1

smcrouted (with -N option) works perfectly fine with max. 32 virtual interfaces. With 33 ore more:

daemon.warn smcroute: Kernel MAXVIFS (32) too small for number of interfaces: Out of memory

Please, could you tell me how to increase that limit? I didn't find the responsible place in the kernel menuconfig. I found a similar question on stackoverflow but the answer didn't help.

EDIT: openWRT 19.07.7 is running on a x86-64 machine with 254 VLANs.

1 Like
2

Wow. What is this like an entire university campus with 254 buildings?

3

Just one building with 254 apartments for students. Some of them (more than 32) would like watching IPTV using dlna clients.