ping: sendto: No buffer space available

[Fernando Braga <fernando_(_at_)_vcnet_(_dot_)_com_(_dot_)_br>]

I'm running GENERIC-3.1-stable, with a rl0 and a wi0, and I'm getting
this error message on rl0 interface

renoir# ping 192.168.7.25
PING 192.168.7.25 (192.168.7.25): 56 data bytes
ping: sendto: No buffer space available
ping: wrote 192.168.7.25 64 chars, ret=-1
ping: sendto: No buffer space available
ping: wrote 192.168.7.25 64 chars, ret=-1
ping: sendto: No buffer space available
ping: wrote 192.168.7.25 64 chars, ret=-1
--- 192.168.7.25 ping statistics ---
3 packets transmitted, 0 packets received, 100% packet loss
renoir#

after the computer run for some time. The time it takes for beginning to
show the error is random: from 2 days up to 1 week.

It goes normal after a reboot.

Have you seen this problem before ?

Fernando