This counter tracks packets dropped specifically because the router detected a bad checksum in the IP header. A rising count here points to link-layer corruption upstream of the router's routing logic -- bit errors introduced on the satellite RF path or a misbehaving upstream device -- rather than a routing or configuration problem, since the packet's IP header itself failed integrity validation before the router even attempted to route it. If this counter climbs in step with a degrading Eb/No reading, that correlation confirms the bad checksums are being caused by a weakening satellite signal corrupting bits in transit rather than by a misconfigured end-station.