WARP to WARP communication failures

What is the name of the domain?

N/A

What is the error number?

N/A

What is the error message?

N/A

What is the issue you’re encountering

We have WARP-to-WARP communication enabled in our client configuration under Zero Trust. Sometimes after a period of time or after an endpoint reboots, this communication fails between endpoints.

What steps have you taken to resolve the issue?

Verified that WARP-to-WARP is enabled in the client settings.

Verified that both WARP profiles (which are in include mode) have 100.96.0.0/12 in the include list.

Verified that other endpoints are able to talk to the endpoint that is failing.

The following seem to temporarily resolve the issue, though not every time:

  • Restarting the endpoints
  • Restarting the Cloudflare WARP service

What are the steps to reproduce the issue?

Attempt to ping two devices connected to WARP through their WARP-assigned IP address. One or both devices may fail to ping or have any other packets flow through. Traceroute from an endpoint that is failing to reach another endpoint will show the traffic still routing over the tunnel, but will fail.

Screenshot of the error