Bandwidth Regulator In Zerto Version 6.5 Is Slowing/Halting Syncs And Replication

KB Number:

000002271

Symptoms:

In version 6.5.x, Bandwidth Regulator will limit VRAs to transmit at only a couple of bytes per second no matter what the setting is set to in Site Settings.

Cause:

Bandwidth regulator is not allowing available bandwidth to distribute across VRAs correctly so some VRA replication is stalled.

Bandwidth Regulator logs will show some VRAs have a "BwLim" of a very small number (in bytes per second):

2019-06-17 09:17:00:408,VraBwLimit,server=<SERVER_GUID> host=<HOST_MOREF>,VraBwLim=206
2019-06-17 09:17:00:408,VraBwLimit,server=<SERVER_GUID> host=<HOST_MOREF>,VraBwLim=3
2019-06-17 09:17:00:408,VraBwLimit,server=<SERVER_GUID> host=<HOST_MOREF>,VraBwLim=500
2019-06-17 09:17:00:408,VraBwLimit,server=<SERVER_GUID> host=<HOST_MOREF>,VraBwLim=1
2019-06-17 09:17:00:408,VraBwLimit,server=<SERVER_GUID> host=<HOST_MOREF>,VraBwLim=1

This is a known issue and resolved in 7.0.

Solution:

Workaround

Disable Bandwidth Regulator entirely from the Site Settings menu in the GUI.

Permanent Fix

Upgrade to 7.0 or higher where the issue was resolved.

Affected Versions:

6.5.x

Hypervisor:

Any