Resolving the "application protocol (failed to apply modifications)" error

Products

• Management Center

Issue/Introduction

The goal here is to be able to modify the default gateway IP address on the Management Center. An attempt was aborted, with the "application protocol error" > "Error: failed to apply modifications". 

Resolution

An attempt at making this modification from the SSH access and received the "Failed to applied modification" error.

This change, being a setup configuration is done with the highest local privilege on the appliance and should only happen from the serial console access.  This is accomplished by going through the same "Initial Configuration" steps but only modifying the IP address of the default gateway, to the desired IP address. For the required steps, please refer to the details in the Tech. Doc. with the URLs below.

https://techdocs.broadcom.com/us/en/symantec-security-software/web-and-network-security/management-center/3-3/MC-initial-configuration/before_begin/config_VA.html 

Note: Ensure the new gateway IP address is reachable from the MC appliance, before making the change. This connectivity should be validated. This connectivity should be validated. Very importantly, if the MC-VA is deployed on an SSP box, this change should be done on the 0:0 management port