MII monitor

The MII monitoring periodically inspects the information provided by the Media Independent Interface. If the interface reflects the failure of a certain network device, the bonding driver interprets that this particular device is down. Options related to MII monitors are:

miimon

Specifies the MII link monitoring frequency in milliseconds. The default value is 0, and this will disable the MII monitor. On Linux on Z, it is often set to 1000.

use_carrier

Specifies whether or not miimon should use MII or ETHTOOL ioctls vs. netif_carrier_ok() to determine the link status. The default value is 1, which enables the use of netif_carrier_ok(). This is supported by the qeth device driver on Linux on Z.

updelay

Specifies the time, in milliseconds, to wait before enabling a slave after a link recovery has been detected. The updelay value should be a multiple of the miimon value.

downdelay

Specifies the time, in milliseconds, to wait before disabling a slave after a link failure has been detected. The downdelay value should be a multiple of the miimon value.