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Problem with in 2.6.16 embedded kernel - bug?

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2008-04-29
2013-06-06
  • Robert King
    Robert King
    2008-04-29

    We're working on a project using the 2.6.16 kernel.  We have a pair of ethernet ports bonded and connected to an on-board switch.  When the card containing the switch is pulled and re-inserted a short time later, the bonded links always re-connect, but the bonding driver does not always select an active link and we loose contact with that system.

    BROKEN:

       bonding: bond1: link status definitely down for interface eth2, disabling it
       bonding: bond1: link status definitely down for interface eth3, disabling it
       bonding: bond1: now running without any active interface !
       e100: eth2: e100_watchdog: link down
       e100: eth3: e100_watchdog: link down

    <time passes>

    *  bonding: bond1: link status definitely up for interface eth2.
    *  bonding: bond1: link status definitely up for interface eth3.
       e100: eth2: e100_watchdog: link up, 100Mbps, full-duplex
       e100: eth3: e100_watchdog: link up, 100Mbps, full-duplex

    WORKING:

       bonding: bond1: link status definitely down for interface eth2, disabling it
       bonding: bond1: link status definitely down for interface eth3, disabling it
       e100: eth2: e100_watchdog: link down
       e100: eth3: e100_watchdog: link down
       e100: eth2: e100_watchdog: link up, 100Mbps, full-duplex
       e100: eth3: e100_watchdog: link up, 100Mbps, full-duplex
    *  bonding: bond1: link status definitely up for interface eth2.
    *  bonding: bond1: link status definitely up for interface eth3.
    *  bonding: bond1: making interface eth2 the new active one.

    We see this behaviour when running in both balance-rr and in active-backup modes.

    Is this a known bug, or perhaps a former bug fixed in a later release?  (Haven't been able to find a list of fixed bugs and their corresponding releases yet.)

    -- Robert King