/ @aarontechtalk
What we will cover...
what is triton mode? vMX default to this limited license mode
you will see an error like this, until you have installed a vMX license
RT Instance: Only loopback interface is supported under vrf routing instances in triton mode.
sometimes you may need to remove white space from the license... I've also seen it where I can copy the license right off the Juniper website and paste it directly into the vMX command line and it works. So, it varies.
Links...
another example of my showing how to install the vMX license...
• cisco and juniper sp - l3vpn
...fast forward to 54:30
Juniper JNCIA-Junos - Aaron BNB TT
• Juniper JNCIA-Junos
Juniper SP - Aaron BNB TT
• Service Provider - Juniper, Cisco & MEF