if_em goes mum

[Poul-Henning Kamp]

Every few minutes my if_em goes mum, it receives packets but
does not transmit anything.

ifconfig em0 down ; sleep .1 ; ifconfig em0 up

makes it work again.
-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.