No buffer space available

[Thiago Esteves de Oliveira]

Hello,

I've had a problem with one of my FreeBSD servers, the machine has stopped its network services
and then sent these messages:

-Mar 27 13:00:03 anubis dhcpd: send_packet: No buffer space available
-Mar 27 13:00:26 anubis routed[431]: Send bcast sendto(em0, 146.164.92.255.520): No buffer space
available

The messages were repeated a lot of times before a temporary solution. I've changed the
kernel(FreeBSD 6.2) to an older one(FreeBSD 6.1) and since then it's been working well. What
happened?

P.S.: I can give more informations if necessary.