we are having a nexus switch which is being monitored on our CA monitoring tool . Intermediately CA tools SNMP walk gets failed and it gives an error mentioning Management agent loss.Can any one please help with this  

Hi,There was a leaf Switch live in our fabric which was having some issues . We got an RMA for it and replaced the new leaf Switch with the same Node ID. After replacement we are unable to SSH the new leaf Switch from APIC .getting some error for RSA...