[FUG-BR] Placa de rede: instavel

[Guilherme]

Olá, sou novo no FreeBSD e estou tendo problemas com minha placa de rede.
Estou utilizando o  FreeBSD 6.1-PRERELEASE.
O modelo da placa é xl0: <3Com 3c905-TX Fast Etherlink XL>.

Acontece que as vezes a internet cai e qdo eu vejo no dmesg o que é 
aparece o seguinte:

xl0: link state changed to DOWN
xl0: link state changed to UP
xl0: link state changed to DOWN
xl0: link state changed to UP
xl0: link state changed to DOWN
xl0: link state changed to UP
xl0: link state changed to DOWN
xl0: link state changed to UP
xl0: link state changed to DOWN
xl0: link state changed to UP
xl0: transmission error: 90
xl0: tx underrun, increasing tx start threshold to 120 bytes
xl0: link state changed to DOWN
xl0: link state changed to UP


O que poderia estar acontecendo?!


Grato,
Guilherme.