So I just confirmed and this should indeed just be 1 every 5 secs or so… you can maybe confirm with tcpdump/ wireshark.
I’ll try the same my side but it shouldn’t be every 2 secs AFAICT
Does the behavior go away if you disable “GDM”?
Yeah, it seems that it’s once every five seconds for each port. tcpdump and wireshark aren’t useful because the packet is not actually sent anymore (sendmsg() returns EACCES).
If I disable GDM, the bad broadcast address appears to stop being used. Now I just get multicast warnings every ten seconds:
Jun 14, 2019 18:41:49.813 [0x80d3eef00] WARN - NetworkServiceBrowser: Error sending out discover packet from 192.168.0.1 to 239.255.255.250: Permission denied
Jun 14, 2019 18:41:49.813 [0x80d3eef00] WARN - NetworkServiceBrowser: Error sending out discover packet from 192.168.1.1 to 239.255.255.250: Permission denied
Jun 14, 2019 18:41:49.813 [0x80d3eef00] WARN - NetworkServiceBrowser: Error sending out discover packet from 192.168.0.4 to 239.255.255.250: Permission denied
Jun 14, 2019 18:41:49.814 [0x80d3eef00] WARN - NetworkServiceBrowser: Error sending out discover packet from fe80::225:90ff:fef5:9b74%lagg0 to ff02::f%6: Permission denied
Jun 14, 2019 18:41:49.814 [0x80d3eef00] WARN - NetworkServiceBrowser: Error sending out discover packet from 2001:558:6007:a4:1de6:32ba:121f:3b to ff02::f%6: Permission denied
Jun 14, 2019 18:41:49.814 [0x80d3eef00] WARN - NetworkServiceBrowser: Error sending out discover packet from 107.5.177.180 to 239.255.255.250: Permission denied
Both IPv6 addresses are on my external interface. I expect these remaining warnings would be solved by setting IP_MULTICAST_IF, though I only expected to get them either internally or externally, not both.
Heh, just noticed that the “Preferred network interface” box has managed to get even worse in this release:
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