Two Thunderbolt Ethernet Cables - one for internet, one for Raspberry Pi

Hi, I'm running against a wall with this issue.
I recently purchased a second Thunderbolt Ethernet adapter, so that I could use one to connect to the internet via ethernet, and another, to connect my rMBP with a Raspberry Pi via ethernet. Try as I might, I cannot get both to work at the same time - - I've tried changing the sort-order to be either RPI-TB & Ethernet-TB, or Ethernet-TB followed by RPI-TB - -- I'm simply unable to connect to the RPI's IP-address (which would be 192.168.2.200) if I have functional internet on at the same time.
How should I go about fixing this issue - I would really rather not be using Wi-Fi.

Hi, JerBear65,
Thanks for the suggestion; I followed your instructions and found:
1. All of my listed servers are in use, so that wasn't it.
2. The e-mail account configuration can't be the problem since, when I created the e-mail account(s) to try the various alternative OS X and OS 9 mail applications, I had to create the accounts fresh in those programs (I never normally used them before). Also, when I tried other existing e-mail accounts that I have on the same ISP in my normal e-mail activity, the problem was consistently the same throughout all the trial runs. It would have been unlikely that ALL of the settings for ALL of my seven e-mail accounts were simultaneously corrupted.
On the other hand, if I'm correct in assuming a corrupt preference file somewhere, it would have to be related to sending e-mail in OS X, yet NOT be accessed when sending e-mail while in OS X but sending through Classic 9.
That's what makes this problem so weird...
Regards, and thanks for your suggestion, and any others you might have,
Alan Paul
==============================================
Hello Alan Paul,
The first thing you might try is from the desktop.
Choose Go>go to folder and type library/scripts/mail
scripts and hit Go. Then choose manage SMTP
servers.scpt
his will open the Script Editor and you would chose
Run. After it runs, it will show all mail severs not
in use and you can delete them.
When you close Script Editor it will ask if you want
to save the changes click YES so the changes will
take affect. Then restart and see if that helps.
The only other thing would be to delete that email
account and then reconfigure.
JerBear65

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