Hi, I have configured a Tor bridge to go through a particular Tor guard relay (that I also own), as an experiment. Upon initialization I am getting this warning: "Your guard [fingerprint] is failing an extremely large amount of circuits. This could indicate a route manipulation attack, extreme network overload, or a bug. Success counts are 52/275. Use counts are 67/67. 268 circuits completed, 0 were unusable, 217 collapsed and 1 timed out. For reference, your timeout cutoff is 60 seconds". Both relays are running Tor 3.0.10. I have never received this warning before. How do I interpret the numbers above, and debug the issue? The guard is far from saturating its network bandwidth. It has 98% idle CPU and plenty of free memory. I am not running any attacks against it. It does use a tuned-up sysctl.conf but I have never had any problems with it. "tcpdump icmp" does not show anything interesting. There are no warnings in the guard's log. Thanks, Igor