MGD_DEVICE_CONFIG_ERROR in VCO events

Products

• VMware VeloCloud SD-WAN Edge Appliance

Issue/Introduction

Under VCO events, customer might see "MGD_DEVICE_CONFIG_ERROR" due to invalid settings detected. Upon expanding the event, we see an error related to dhcp.py:534: Invalid value (too long) for option 119. 

Environment

All SDWAN software version

Cause

DHCP Option 119 is used to provide Domain Search List information in a DHCP (Dynamic Host Configuration Protocol) response.

If the user has configured a list of private DNS servers which has more than 255 characters, then edge will throw an error whenever any changes been made on the edge from VCO UI.

Resolution

It's a product limitation and one should consider configuring DNS servers within 255 characters.

Note: There is no production impact due to this warning, it is just for information.