On 20 June 2013 08:38, Bernd <[email protected]> wrote: >> Hi, >> >> I've got problems with increasing Ierrs on several machines with >> several em(4) interfaces. Is there a way to get *detailed* information >> on these? >> >> # netstat -I em3 -d >> Name Mtu Network Address Ipkts Ierrs Opkts >> Oerrs Colls Drop >> em3 1500 <Link> de:ad:be:ef 95655063 435896 >> 63427593 0 0 0 >> em3 1500 fe80::%em3/ fe80::xx:ff:ffe 95655063 435896 >> 63427593 0 0 0 >> >> is not that verbose. > > > We hacked the kernel. The interface(s) just miss packets, see screenshot: > > http://imageshack.us/f/96/fkad.png/ > > Customer urged to move from OpenBSD to Ubuntu for BGP routing. >
Missed packets means the ring buffer is full and the card has to drop the packet. In other words, you're not fast enough. Send a dmesg, and we need an idea of the packet rate you're pushing, chances are you're hitting our stack limit.
