[ovs-discuss] Open vSwitch balance-slb bond mode with two upstream switches

Andy Zhou azhou at nicira.com
Wed Sep 9 23:28:07 UTC 2015

On Wed, Sep 9, 2015 at 9:09 AM, Ben Pfaff <blp at nicira.com> wrote:
> On Fri, Aug 21, 2015 at 07:14:33PM +0000, Jason Burns wrote:
>> Can the balance-slb bond mode in Open vSwitch be used for a bond
>> connected to two separate upstream switches?
>> When I read the documentation [1] it states that only active-backup
>> can be used to connect to two separate upstream switches, but no
>> explanation is provided.
> I don't recall the exact reason, but I remember that this caused
> problems, and that's why we documented it.
> I hope that someone else can speak up with the reason.

Bond traffic rebalancing or link flapping may mass up the mac learning
table of those separate upstream switches.

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