System Synchronization Configuration Commands
Page 376 7750 SR OS Basic System Configuration Guide
Parameters port-id — Identify the physical port in the slot/mda/port format.
7750 Model Ref1/Slots Ref2/Slots
SR-1 Not enabled Not enabled
SR-7 1 — 2 3 — 5
SR-12 1 — 5 6 — 10
SR-c12 No restriction No restriction
Note that ref1 and ref2 cannot be configured on the same MDA/CMA for the SR-c12.