Article number
000003317
Affected Versions
All
Source Hypervisor
All
Target Hypervisor
All

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

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Root 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.

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.

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.