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yulihao @
mytsing520 由
https://cloud.google.com/vpc/docs/vpc?hl=en#traceroute:For internal reasons, Google Cloud increases the TTL counter of packets leaving Compute Engine instances for the internet. Tools like traceroute might provide incomplete results because the TTL doesn't expire on some of the hops. Hops that are inside and outside of Google's network might be hidden.
The number of hidden hops varies based on the instance's Network Service Tiers, region, and other factors. If there are only a few hops, it's possible for all of them to be hidden. Missing hops from a traceroute result don't mean that outbound traffic is dropped.
There is no workaround for this behavior.