ICMP Host Unreachable from 128.2.177.47 for ICMP Echo sent to lama.auton.cs.cmu.edu (128.2.176.86) ICMP Host Unreachable from 128.2.177.47 for ICMP Echo sent to lama.auton.cs.cmu.edu (128.2.176.86) ICMP Host Unreachable from 128.2.177.47 for ICMP Echo sent to lama.auton.cs.cmu.edu (128.2.176.86)