Found this on EMC forum for that error message: "From Unisphere, confirm that the IP address of the management LAN is configured correctly.... Make sure that the management LAN IP on SPB is pingabble. Check the network connectivity, cables and the switch port if the SP is working fine. Otherwise check the SP if there is any amber LED on it. If everything is fine, seems to be a problem in the management Server Process (CIMOM) and you can verify this from the SP events. if so, login to https://SPB_IP_ADDRESS/setup as sysadmin and click on Restart Management Server button."
Both SP's seem to be operational and I can ping both. There doesn't seem to be any further errors on the console either. What is the impact of resetting the management agent on the SP, do the LUNS lose connectivity and trespass to the other SP or it is purely for management. Lastly is there a way of confirming whether we encountered a small blip or whether the issue still remains
Resetting the management server on the SP has no impact on the data path - your hosts will not see any impact. Without more detail I'm not sure why you received that message. Are you able to access both SPA and SPB?