Setting up a (brand new) Juniper EX2200c (the 12 port fanless version ofthe EX2200) to use LACP with a Mac Pro.
This will cover firmware updates, initial configuration (including someIPv6), and of course, LACP itself.
Setting up a new EX2200-C with LACP
After unpacking the switch, the first thing I do is take a picture.
Updating the firmware
You upgrade Junos OS on an EX Series switch by copying a software package to your switch or another system on your local network, then use either the J-Web interface or the command-line interface (CLI) to install the new software package on the switch. Finally, you reboot the switch; it boots from the upgraded software.
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Download the new firmware from Juniper Support. An account is requiredto access the downloads. You can create one and register a single deviceto get access to the firmware updates. Copy the compressed file(something like jinstall-ex-2200-12.3R2.5-domestic-signed.tgz) to/var/tmp on the switch:
Login to the switch and run:
I also ensure that I configure at least one NTP server so that any logmessages from the switch are date/timestamped correctly. You can findsome of your own entries by doing a dns lookup of ‘pool.ntp.org’.
Some basic security precautions:
I also run IPv6 on as much of the network as possible (1, itsunavoidable, and 2, its good practice for the future).
Configuring an LACP link on the Juniper
Here, we define both of our interfaces as 802.3ad (this is the IETFdesignation for LACP link aggregation) and specify the name of theaggregate port we will use. After that, our configuration directives aredone on the aggregate port, not the physical ports. Here, we define theoptions we wish to use for LACP. Finally, we set the port up forethernet-switching (if we are using VLANs, we would need to put the portin trunk mode. If not, we can simply assign the port to a vlan in thevlan section of the config.
Configuring an LACP link on OS X
In system preferences, choose network. Choose the gear-dropdown and then“Manage Virtual Interfaces”. Click ‘+’. Choose a name for the aggregate(I chose ‘Lagg’), and select the interfaces you wish to participate (Ichose Ethernet 1 and Ethernet 2). Click done. Click done. You can nowconfigure your IP address(es) as normal.
OS X Lagg Interface Creation
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OS X Virtual Interfaces
OS X Lagg Status
You should see that the status on the mac is green for both interfaces.
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You now have redundant connections, and, depending on what you’re doing,the ability to copy information at > 1 Gbit.