[FUG-BR] Erros com Placas 3Com

[Breno Vale]

Amigos,
nos últimos dias nosso servidor proxy vem apresentando os erros abaixo.
Tenho o seguinte.
xl0 <-> Swicth Rede Válida
xl1 <-> não usada
xl2 <-> Roteador Cisco 3620
vr0 <-> não usada
 
Jul 24 21:05:12 proxy kernel: xl2: transmission error: 90
Jul 24 21:05:12 proxy kernel: xl2: tx underrun, increasing tx start 
threshold to 120 bytes
Jul 24 22:31:07 proxy kernel: xl2: transmission error: 90
Jul 24 22:31:07 proxy kernel: xl2: tx underrun, increasing tx start 
threshold to 180 bytes
Jul 25 10:24:57 proxy kernel: xl2: watchdog timeout
Jul 25 10:24:57 proxy kernel: xl2: link state changed to DOWN
Jul 25 10:24:59 proxy kernel: xl2: link state changed to UP
Jul 25 10:25:48 proxy kernel: xl2: transmission error: 90
Jul 25 10:25:48 proxy kernel: xl2: tx underrun, increasing tx start 
threshold to 120 bytes

Passei o tráfego da xl2, pra vr0 e mudei o cabo. Porém, após o reboot..
Jul 25 11:47:40 proxy kernel: xl0: watchdog timeout
Jul 25 11:47:40 proxy kernel: xl0: link state changed to DOWN
Jul 25 11:47:42 proxy kernel: xl0: link state changed to UP
Jul 25 12:05:02 proxy kernel: xl0: watchdog timeout
Jul 25 12:05:02 proxy kernel: xl0: link state changed to DOWN
Jul 25 12:05:04 proxy kernel: xl0: link state changed to UP

Será que pode ser a 3Com?
Seria ideal nesse servidor onde passa o tráfego de todo o provedor 
colocar uma 3Com com MTU 4500??
Sugerem algum modelo?
Agracedo antecipadamente...
Breno Vale
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