> AFAIU, ENOBUFS happens when the NIC transmit queue is full. Have you looked > at the interface statistics to see if there are many dropped packets? Try, > e.g., > > $ netstat -ni
Name Mtu Network Address Ipkts Ifail Opkts Ofail Colls lo0 32768 <Link> 51863 0 51863 0 0 lo0 32768 ::1/128 ::1 51863 0 51863 0 0 lo0 32768 fe80::%lo0/ fe80::1%lo0 51863 0 51863 0 0 lo0 32768 127/8 127.0.0.1 51863 0 51863 0 0 em0 1500 <Link> 00:30:48:92:24:b0 711639121 168364 838861401 1124769 0 em0 1500 192.168.0/2 192.168.0.1 711639121 168364 838861401 1124769 0 em1 1500 <Link> 00:30:48:92:24:b1 329783577 113371 188872522 2 0 em1 1500 172.16.0/24 172.16.0.1 329783577 113371 188872522 2 0 em2 1500 <Link> 90:e2:ba:c9:22:1c 0 0 1 1 0 em2 1500 192.168.100 192.168.100.1 0 0 1 1 0 enc0* 0 <Link> 0 0 0 0 0 pppoe0 1492 <Link> 329558645 0 188975582 180546 0 pppoe0 1492 81.12.67.201 81.12.67.12 329558645 0 188975582 180546 0 tun0 1500 <Link> 16995 0 29189 0 0 tun0 1500 192.168.2/2 192.168.2.1 16995 0 29189 0 0 vlan1 1500 <Link> 00:30:48:92:24:b0 763387 0 766662 1871 0 vlan1 1500 192.168.1/2 192.168.1.1 763387 0 766662 1871 0 vlan2 1500 <Link> 00:30:48:92:24:b0 474476153 0 15182811 0 0 vlan2 1500 192.168.3/2 192.168.3.1 474476153 0 15182811 0 0 vlan4 1500 <Link> 00:30:48:92:24:b0 109009001 0 167250501 4757578 0 vlan4 1500 192.168.4/2 192.168.4.1 109009001 0 167250501 4757578 0 pflog0 33136 <Link> 0 0 71617 0 0
