> I in fact have bonded interfaces on the laggy server. When I checked
> the bonding config, I realized a while ago I had changed from
> balance-rr / mode 0, to 802.3ad / mode 4. (I did this because I kept
> getting "bond0: received packet with own address as source address"
> when using balance-rr with a bridge interface. The bridge interface
> was for using KVM.)
See the comments about mode 0 in this thread,
http://lists.centos.org/pipermail/centos-virt/2014-March/003720.html
in particular
http://lists.centos.org/pipermail/centos-virt/2014-March/003733.html
> Like the Serverfault poster, I have an HP TrueCurve 1800-24g switch.
> The switch is supposed to support 802.3ad link aggregation. It's not
> a managed switch, so I (perhaps incorrectly) assumed that 802.3ad
> would magically just work. Either there is more required to make it
> work, or it's implementation is broken. Curiously, however, running
> my bond0 in 802.3ad mode did work without any issue for over a month.
I'm unfamiliar with these switches. The Cisco switches we use, all managed,
require explicit configuration for LACP/802.3ad.
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