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what' wrong with the system

leyearn
Regular Advisor

what' wrong with the system

the cluster includes two alpha 4100 servers
and hsz50 disk array
on the two server the file /var/adm/syslog.dated/*date/kern.log
the following messages:

Mar 24 11:26:43 bcptt1 vmunix: alt0: Link down
Mar 24 11:26:44 bcptt1 vmunix: alt0: Link up ReceiveFlowControl
Mar 24 11:39:37 bcptt1 vmunix: alt0: Link down
Mar 24 11:39:37 bcptt1 vmunix: alt0: Link up ReceiveFlowControl
Mar 24 13:23:43 bcptt1 vmunix: alt0: Link down
Mar 24 13:23:43 bcptt1 vmunix: alt0: Link up ReceiveFlowControl
Mar 24 13:24:33 bcptt1 vmunix: alt0: Link down
Mar 24 13:24:34 bcptt1 vmunix: alt0: Link up ReceiveFlowControl
Mar 24 13:31:55 bcptt1 vmunix: alt0: Link down
Mar 24 13:31:55 bcptt1 vmunix: alt0: Link up ReceiveFlowControl

the alt0 is 1000Mb/s ethernet interface
4 REPLIES
Venkatesh BL
Honored Contributor

Re: what' wrong with the system

hmm...looks like a flaky ethernet interface.
Mark Poeschl_2
Honored Contributor

Re: what' wrong with the system

Looks like maybe the switch / network device that the servers are plugged into has some settings that are incompatible with your NIC. If both servers are doing the same thing, check your network device configuration.
Archunan Muthiah
Honored Contributor

Re: what' wrong with the system

Leyearn,
The link is down means that there is a cabling or hub/switch problem.

Try ping to your interface.


Archunan
God is Artist, we are all just brushes
Ivan Ferreira
Honored Contributor

Re: what' wrong with the system

I have seen this behaviour with cisco switches, sometimes, can be avoided disabling auto-negotiation. But, auto-negotiation should be enabled on GB Ethernet. Anyway, you may try that. As I don't manage the switches, I cannot play with the configuration.

Lastly this could be a bad cable or switch port.
Por que hacerlo dificil si es posible hacerlo facil? - Why do it the hard way, when you can do it the easy way?