With the continued expansion of low Earth orbit (LEO) satellite constellations,
inter-satellite links (ISLs) have become a critical infrastructure for network
connectivity and end-to-end forwarding capability. Existing studies often show a
gap between the physical layer and the system layer: physical factors such as
link budget, pointing error, and Doppler mismatch are frequently simplified,
while link performance analysis is difficult to validate in a closed loop using
a real protocol stack. In addition, dynamic topology and time-varying link
states make fault detection and localization highly complex.To address these
problems, this paper constructs a decentralized satellite network emulation
platform and proposes a decentralized addressing and connectivity verification
method for full inter-satellite link interfaces. At the physical layer, an
optical inter-satellite link (OISL) model is developed by incorporating
free-space path loss, Doppler mismatch, and BER-FEC-PLR mapping, with its
dynamic evolution driven by orbital parameters. At the system layer, based on a
one-satellite-one-container architecture, OpenClaw is introduced to perform link
detection and log analysis, thereby generating diagnostic reports.Experimental
results show that the proposed method supports interface-level link detection,
identifies dynamic link faults such as transient impairments caused by Doppler
mismatch in real time, and generates corresponding diagnostic reports.