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Do you happen to have any resources/tools/ideas on how to troubleshoot this? I’m having issues with mDNS sometimes just not working on a network I maintain. I c
by NobodyNada 4y ago
Do you happen to have any resources/tools/ideas on how to troubleshoot this? I’m having issues with mDNS sometimes just not working on a network I maintain. I can run Wireshark on two devices and see that one is sending out mDNS queries and the other isn’t receiving them at all.
It’s not just mDNS though; all multicast traffic is affected (sometimes ARP doesn’t even work, and I can’t ping the other device by IP).
- klabb3 4y agoI've had an issue where mdns transmit would cease after X minutes uptime on windows. Nothing even shows up in Wireshark. I'm still not sure why but I'm assuming the NIC driver for windows didn't like it. Switching from wifi to ethernet fixed the problem. Switching to Linux (same machine) also fixed the problem. Oh and it was only certain multicast udp that was affected. Regular ip broadcast still worked.
- tinus_hn 4y agoARP is not multicast in the IGMP sense, if that doesn’t work your cabling or switches are broken or you have a serious firewall issue. But given it sometimes doesn’t work, probably hardware.