Config 2 ethercat ports?

My PC has two Ethernet ports. I want to use port 1 to connect to devices A, B, and C, and port 2 to connect to devices D, E, and F because they are in separate locations. Is it possible to configure two EtherCAT ports?

Yes, you add a second master in your /etc/ethercat.conf
There is already a line:

# The MASTER<X>_DEVICE variables also determine, how many masters will be
# created: A non-empty variable MASTER0_DEVICE will create one master, adding a
# non-empty variable MASTER1_DEVICE will create a second master, and so on.
#
MASTER0_DEVICE="eno0"
MASTER1_DEVICE="eno1 or mac adress" 

Then you can add a second master in your ethercat-conf.xml

<master idx="1" appTimePeriod="1000000" refClockSyncCycles="5">

And that's it.

I had testet it with 2 Nic's not long ago

It's working fine.

Greetings Sven

and then how will you specify the .hal file for separate masters? 

there will be more lcec. instances? 

do anybody have working config?

You get after start another lcec.1. instances with your pins.

I can provide a config later this day.

Greets sven

This is my Config which should Work. 
It´s a small setup in my Shop on my Workbench. It is for tinkering with, EtherCAT & LinuxCNC.

The PC is an old Siemens Microbox PC with 3 Ethernet Ports.