Would suggest a problem with the fiber link?
juniper> show interfaces vcp-255/1/0 Physical interface: vcp-255/1/0, Enabled, Physical link is Down Interface index: 68, SNMP ifIndex: 101 Link-level type: 70, MTU: 1514, Speed: 10000mbps, Media type: Fiber Device flags : Present Running Interface flags: Hardware-Down Link flags : None CoS queues : 0 supported, 0 maximum usable queues Current address: Unspecified, Hardware address: Unspecified Last flapped : Never Input packets : 0 Output packets: 0 Interface transmit statistics: Disabled Logical interface vcp-255/1/0.32768 (Index 6) (SNMP ifIndex 102) Flags: Encapsulation: Unspecified Input packets : 0 Output packets: 0