jeans/operating-system
jeans/operating-system
1
0
Fork 0
mirror of https://github.com/home-assistant/operating-system.git synced 2025-07-24 13:36:31 +00:00
Code Issues Packages Projects Releases Wiki Activity

Increase maximum IGMP memberships (#1222)

Browse Source 
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
This commit is contained in:
Stefan Agner 2021-02-15 19:27:35 +01:00 committed by GitHub
parent b91c432fa8
commit c2c05312a0
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
buildroot-external/rootfs-overlay/etc/sysctl.d/20-network.conf Normal file
View File

@ -0,0 +1,3 @@
# Since multicast is rather popular and we have many integrations running,
# more than the default of 20 memberships might be required.
net.ipv4.igmp_max_memberships = 1024