This article will help you tune DRBD when you're seeing continuous disconnections across busy or low throughput links.
If you see these messages in the logs:
May 26 13:54:07 node-0 kernel: drbd r0: initial packet S crossed
- or -
May 26 13:54:07 node-0 kernel: drbd r0: PingAck did not arrive in time.
or DRBD® continuously disconnects after successfully connecting for a short time try adding the following to the net section of the affected resource:
If the problem persists, consult the `drbd.conf` man page for more details about each section and tune them accordingly and/or ask the admin to verify their network is healthy and is performing as well as they would expect.
Reviewed 2020/12/07 – DGT