configure 802.3ad LACP on hypervisors and switch about puppet HOT 4 OPEN

so this tentatively works on dev-fallingrocks in proper LACP mode. The two interfaces on the NIC are plugged into Ethernet 31 and 32 on the switch and have been configured as members of port-channel 16, and the quick-n-dirty test of "pull one of the cables out and make sure connections don't die" succeeds. Once another machine successfully comes up on the bond interface I'll try confirming the increase in bandwidth.

from puppet.

dev-fallingrocks, hal, and scurvy are now running in LACP mode.

To configure this on the switch, after logging in and indentifying the correct interfaces (say, Ethernet 31 and Ethernet 32), one does:

enable
config
interface Ethernet 31-32
channel-group 16 mode active
interface port-channel 16

something along those lines

from puppet.

with #430 all the hypervisors are configured on the host-side for LACP, but aren't yet on the switch side. The LACP stuff won't take effect until networking on the hypervisors is restarted, which is a downtime-causing event that will need to be planned.

from puppet.

@abizer this is done, right?

from puppet.