Interface with QSFP-100GBASE-LR4 remains down when is configured as VC port, but it shows up with is a network port.

• QSFP-100GBASE-LR4 is not supported on QFX5120.
• You can check the supported platforms for the QSFP on the following link: https://apps.juniper.net/hct/model/?component=QSFP-100GBASE-LR4&tab=sPlatforms
• On the other hand, you can see the supported SFP for QFX5120 on the following link: https://apps.juniper.net/hct/product/?prd=QFX5120-48Y