c2c05312a0
Currently Linux has a limit of IGMP memberships of 20. When trying to add membership to more than that, Linux fails with: OSError: [Errno 105] No buffer space available Allowing more memberships should not really be problematic as memory is allocated dynamically when membership is actually added. However, there is a protocol limit of how many memberships a host can be in. The number of memberships needs to fit in a single group report datagram of 64kB. In total 5459 group records fit in a datagram, but due to IP header options this might be slightly smaller in practise. (see https://github.com/home-assistant/core/issues/45957). Use a limit of 1024, which should be plenty of headroom in both directions. Related to: https://github.com/home-assistant/core/issues/45957
4 lines
173 B
Plaintext
4 lines
173 B
Plaintext
# Since multicast is rather popular and we have many integrations running,
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# more than the default of 20 memberships might be required.
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net.ipv4.igmp_max_memberships = 1024
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