Info about link failure detection
becker at scyld.com
Fri Jan 31 15:25:47 EST 2003
On Fri, 31 Jan 2003, john152 at libero.it wrote:
> i'd like to have a mechanism able to detect instantaneously a link
> failure between two computers each with an ethernet card and with
> Linux software.
Instantaneously? Depending on your definition, that's not possible.
Some hardware provides a quick notification that link beat has been
lost, for media types that have link beat.
> Is there a software that do so?
Yes, in part. I've implemented this in most common drivers:
mii-diag --watch eth0
mii-diag --status eth0
> If threre is a software, where does it bring the failure information
Polling an ioctl() on the device.
Please follow-up on the netdrivers at scyld.com (aka
netdrivers at beowulf.org) mailing list, unless you can relate this to a
Donald Becker becker at scyld.com
Scyld Computing Corporation http://www.scyld.com
410 Severn Ave. Suite 210 Scyld Beowulf cluster system
Annapolis MD 21403 410-990-9993
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