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  • Jay Vosburgh's avatar
    bonding: Add "follow" option to fail_over_mac · 3915c1e8
    Jay Vosburgh authored
    	Add a "follow" selection for fail_over_mac.  This option
    causes the MAC address to move from slave to slave as the active
    slave changes.  This is in addition to the existing fail_over_mac option
    that causes the bond's MAC address to change during failover.
    	This new option is useful for devices that cannot tolerate
    multiple ports using the same MAC address simultaneously, either
    because it confuses them or incurs a performance penalty (as is the
    case with some LPAR-aware multiport devices).  Because the MAC of the
    bond itself does not change, the "follow" option is slightly more
    reliable during failover and doesn't change the MAC of the bond during
    	This patch requires a previous ARP monitor change to properly
    handle RTNL during failovers.
    Signed-off-by: default avatarJay Vosburgh <>
    Signed-off-by: default avatarJeff Garzik <>