Cannot configure secondary NIC in APIC-Em

Installed APIC-EM for POC in our LAB servers,  configured 1 NIC  with PUBLIC IP to access the APIC-EM to access the GUI which is working fine.would like to install another NIC so that it can discover the lab routers as part of the discover and deploy method, but unable to find any option in the GUI to select the NIC or change any existing NIC details, should be looking at the grapevine CLI to make the changes.

 It's Ubuntu under the covers, so you can edit /etc/network/interfaces and add:

 auto eth1

iface eth1 inet static

address ...

broadcast ...

netmask ...

gateway ...

 Then you can run "ifup eth1".