full-2qfx-4srv-evpnvxlan

    =============               =============
    | vqfx1-pfe |               | vqfx1-pfe |
    =============               =============
          |                           |
       em1|                        em1|
    =============               =============
    |           | ------------- |           |
    | vqfx1-re  |    xe-0/0/0   | vqfx2-re  |
    |           |               |           |
    =============               =============
         |   |                      |   |
    eth1 |   | eth1            eth1 |   | eth1
xe-0/0/1 |   | xe-0/0/2    xe-0/0/1 |   | xe-0/0/2

  ========= =========        ========= =========
  | srv11 | | srv12 |        | srv21 | | srv22 |
  ========= =========        ========= =========
  10.10.1.10 10.10.2.10      10.10.1.20 10.10.2.20

# enable LLDP
set protocol lldp interface all



#on the Ubuntu servers:
sudo apt-get update
sudo apt-get install lldpd snmp
sudo service lldpd restart