This is not a post about LACP. This post is about failover
redundancy (active/passive) and Link Aggregation.
Not every installation
is appropriate for the Distributed Virtual Switch (dVS). There are some
very nice things about it, including, but not limited to LACP,
centralized port group management, CLI, port mirroring, and an API.
Depending on the size of the installation, these may or may not be
applicable. Almost without regard to the size of the installation,
redundancy is still needed.
There are 2 parts to the vCenter config:
Add the second nic to the vSwitch
Under the config section for the esx host, choose manage, and then
networking. Select the vSwitch you want to modify (I modified vSwitch0).
Click the Adapter button and add an adapter. Then click the edit button
and choose Teaming and Failover (Teaming is what Linux and VMware call
link aggregation). Ensure that the following are set:
Load balancing: Route based on IP hash
Network failure detection: Link status only
Notify switches: Yes
Ensure that the nic you just added is listed under Standby adapters.
This is important. Once you click OK, the settings will be applied and
we can move on to configuring the switch.
Screenshots from vCenter 5.5
On the switch side, we are configuring an EX4200 running JunOS
14.1X53-D10.1 (This should work back at least as far as 11, but hasn’t
been tested prior to that). It should be noted that:
The primary/backup lines are critical
The primary/backup ports need to match what you configured on the
With out them, this setup will fail.
set interfaces ge-0/0/1 description "esx01 Ports"set interfaces ge-0/0/1 ether-options 802.3ad ae0
set interfaces ge-0/0/1 ether-options 802.3ad ae0 primary
set interfaces ge-0/0/2 description "esx01 Ports"set interfaces ge-0/0/2 ether-options 802.3ad ae0
set interfaces ge-0/0/2 ether-options 802.3ad ae0 backup
set interfaces ae0 description "esx01.cmhome"set interfaces ae0 unit 0 family ethernet-switching port-mode trunk
set interfaces ae0 unit 0 family ethernet-switching vlan members all
set interfaces ae0 aggregated-ether-options link-protection
set interfaces ae0 aggregated-ether-options minimum-links 1set interfaces ae0 aggregated-ether-options link-speed 1g
You should now be able to pull one of the cables in the aggregate with
out losing your connection to the ESXi node. If so, congratulations, you
have redundant links setup.