The server issues a bonding warning message to enable miimon or arp monitoring, even though it is configured

Solution Verified - Updated

Environment

  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • bonding

Issue

  • The following warning message is seen when the network service starts. Is it a problem?
bonding: Warning: either miimon or arp_interval and arp_ip_target module parameters must be specified, otherwise bonding will not detect link failures! see bonding.txt for details.

Resolution

There are two ways to set the bonding parameter. One is using /etc/modprobe.conf, the other is using /etc/sysconfig/network-scripts/ifcfg-bondX.

  • In case of setting a parameter in /etc/modprobe.conf, the parameter may be wrong. Please check the setting again.
options bond0 miimon=100 mode=1 primary=eth0
  • In case of setting a parameter in /etc/sysconfig/network-scripts/ifcfg-bondX, it will always be outputted by operation of the configuration script, then this message does not indicate a problem. The message can safely be ignored.
BONDING_OPTS="miimon=100 mode=1 primary=eth0"

Root Cause

A message warns that the parameter("arp_interval", "arp_ip_target" or "miimon") has not been explicitly set when loading bonding module.

If setting a parameter in "BONDING_OPTS" on /etc/sysconfig/network-scripts/ifcfg-bondX, the configuration script set a parameter by changing a file on sysfs(/sys/devices/virtual/net/bondX/bonding) after loaded bonding module.

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