Environment
- Carbon Black Cloud Sensor: All Versions
- Microsoft Windows: Server 2012, Server 2016
Symptoms
Cause
If the network interface card driver does not fully support Receive Segment Coalescing (RSC), this can cause issues with Carbon Black Cloud communications
Resolution
Disable RSC:
- Open a PowerShell prompt as Administrator
- Run the following command
Disable-NetAdapterRsc *
- Reboot system
- Open the Network Adapter properties > Advanced tab
- Look for the following items to be marked as disabled
Recv Segment Coalescing (IPv4)
Recv Segment Coalescing (IPv6)
- Run sensor install as normal (Attended/Unattended Install)
Additional Notes
- Install may complete over several hours if RSC is not disabled
- Updating the NIC driver may also help alleviate the issue
- This has been historically seen with VirtIO Nutanix but may occur in other setups if the NIC driver does not properly support RSC.
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