HP HPE VAN SDN Controller 2.7 Administrator's Manual page 131

The REST API query now reports that both links are discovered:
NOTE: When you configure a linkDiscoveryVlan for a device, the controller will always
insert a 802.1Q header with the configured VLAN on each link discovery packet sent to all ports
of the device, regardless of the actual port configurations, as the controller does not have any
knowledge of the port configuration.
Configuring OpenFlow Instances with Single VLAN Identifier 131