Hello, I am operating a dedicated server configured as both a web and mail server. Earlier today, the system became completely unresponsive, including failure to respond to ICMP (ping) requests.
I contacted the hosting provider and requested a reboot. Following the reboot, the server returned to normal operation. Upon reviewing the system logs, I identified the following entries from the previous night: Mar 24 03:17:18 mail /bsd: re0: watchdog timeout Mar 24 03:17:22 mail dhcpleased[99738]: bpf_send_packet: writev: No buffer space available Mar 24 03:17:23 mail dhcpleased[99738]: bpf_send_packet: writev: No buffer space available Mar 24 03:17:26 mail dhcpleased[99738]: bpf_send_packet: writev: No buffer space available Mar 24 03:17:27 mail dhcpleased[99738]: bpf_send_packet: writev: No buffer space available Mar 24 03:17:29 mail dhcpleased[99738]: bpf_send_packet: writev: No buffer space available Mar 24 03:17:33 mail dhcpleased[99738]: bpf_send_packet: writev: No buffer space available Mar 24 03:17:41 mail dhcpleased[99738]: bpf_send_packet: writev: No buffer space available Mar 24 03:17:58 mail dhcpleased[99738]: bpf_send_packet: writev: No buffer space available Mar 24 03:18:30 mail dhcpleased[99738]: bpf_send_packet: writev: No buffer space available Mar 24 03:19:34 mail dhcpleased[99738]: bpf_send_packet: writev: No buffer space available Mar 24 03:20:38 mail dhcpleased[99738]: bpf_send_packet: writev: No buffer space available Mar 24 03:21:42 mail dhcpleased[99738]: bpf_send_packet: writev: No buffer space available Mar 24 03:22:47 mail dhcpleased[99738]: bpf_send_packet: writev: No buffer space available Mar 24 03:23:51 mail dhcpleased[99738]: bpf_send_packet: writev: No buffer space available Mar 24 03:24:55 mail dhcpleased[99738]: bpf_send_packet: writev: No buffer space available Mar 24 03:25:59 mail dhcpleased[99738]: bpf_send_packet: writev: No buffer space available These messages appear to indicate a network interface issue (re0 watchdog timeout) followed by failures in packet transmission due to insufficient buffer space. Could you please provide insight into the possible root cause of this behavior, and whether it is likely related to a driver, hardware, or network stack issue? Any guidance would be greatly appreciated. Thank you, Mark
