This article explains the reason why a QFX license includes "Undefined attribute: 12" in the output of 'show system license'.
Some versions of Junos OS include a line labeled "Undefined attribute" in the output of 'show system license'.
Example:
Junos OS version 13.2X51
Junos OS version 14.1X53
root@QFX5100> show system license License usage: Licenses Licenses Licenses Expiry Feature name used installed needed bgp 1 1 0 permanent isis 0 1 0 permanent mpls 0 1 0 permanent Licenses installed: License identifier: JUNOSxxxx License version: 4 Valid for device: TAxxxx Features: QFX-ADV-FEATURE-LIC - QFX Series Edge Advanced feature license 1 permanent
root@QFX5100> show system license License usage: Licenses Licenses Licenses Expiry Feature name used installed needed bgp 1 1 0 permanent isis 0 1 0 permanent mpls 0 1 0 permanent Licenses installed: License identifier: JUNOSxxxx License version: 4 Valid for device: TAxxxx Undefined attribute: 12 <====== Features: QFX-ADV-FEATURE-LIC - QFX Series Edge Advanced feature license 1 permanent
The license attribute code 12 is used to check if vSRX needs to be running on the device. If not, such as an QFX switch not carrying any SRX functions, it can be ignored. This is cosmetic output.
This can be safely ignored on QFX platforms.