Hi,
> I have an E3-1240 fedora37 postfix system using SSDs connected to a cable > modem that's having problems with dropped packets. There is one other > fedora37 server (E5-1650) directly connected to the cable modem that is not > having the same problem, although it's just routing packets, not really > doing much processing of data. The server with the problem is using > libreswan to create a VPN between itself and an i7-7700K with fedora37 > managed at OVH, thinking it would be more resilient than the cable > connection itself. The problem also happens without the VPN, but perhaps > not to the same degree. > > I think the server is certainly powerful enough to process the amount of > DNS queries, but there's also a lot of timeouts. > > How do I troubleshoot this? It's the bridge experiencing the dropped > packets, not the interface itself, it seems? > > They're not packet errors - just dropped packets. Perhaps the processor > can't handle the traffic? > > Do you have a server connected to a cable modem? Is there something about > it being a cable connection that could be causing this? > > There's about 27k dropped packets in about 12 hours of uptime. > > br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 > inet 68.195.111.45 netmask 255.255.255.248 broadcast > 68.195.111.47 > ether ae:64:2c:25:b5:44 txqueuelen 1000 (Ethernet) > RX packets 11355786 bytes 21634260431 (20.1 GiB) > RX errors 0 dropped 26349 overruns 0 frame 0 > TX packets 7374430 bytes 993860294 (947.8 MiB) > TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 > > eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 > ether 14:da:e9:97:ab:72 txqueuelen 1000 (Ethernet) > RX packets 16224042 bytes 22179550934 (20.6 GiB) > RX errors 0 dropped 165 overruns 0 frame 0 > TX packets 7493927 bytes 1031987928 (984.1 MiB) > TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 > device interrupt 17 memory 0xdf100000-df120000 > > Perhaps it’s not relevant in your case, > But many of my colleagues have also problems with their cable modem. > While turning it on, it claims it can handle an MTU of 1500 bytes, while > in reality all above 1472 causes vague problems. > This should have been handled through auto-probing of ICMP-protocol, but > it isn’t. > But your might be a different issue…. > Thanks so much for the thought. Just tried this, and the problem persists :-( Thanks, Alex
_______________________________________________ users mailing list -- users@lists.fedoraproject.org To unsubscribe send an email to users-le...@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
