I hope this is the right forum to ask this question. If not - feel free to
direct me elsewhere.
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.
active-backup
Assigns all flows to one slave, failing over to a backup
slave when the active slave is disabled. This is the
only bonding mode in which interfaces may be plugged into
different upstream switches
I read the INTERNALS [2] document to get more details on the complications with
balance-slb, but after reading this I still don’t see anything that would
prevent balance-slb from working when connected to two separate switches. My
lab testing here is positive so far.
Am I missing some piece of information about why this is a bad idea? I’d like
to take full advantage of the bond member bandwidth for the multiple virtual
machines running on this host, AND get the fault tolerance that two separate
switches provide. Ideally I’d be able to do this without any configuration on
the switch side such as LACP. Is balance-slb a good way to do this, or is there
some other way?
Thanks for your help!
[1] http://openvswitch.org/support/dist-docs/ovs-vswitchd.conf.db.5.html
[2] https://github.com/openvswitch/ovs/blob/master/vswitchd/INTERNALS
Jason Burns
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