Presumably, you added that as an External node because ICMP was blocked and didn't want it show up as down. Now that you can determine status purely via SNMP, you can change the node type to SNMP
Presumably? What if I presume you could hop on the next plane, spend a couple of weeks here and fix all my NPM and SAM problems for free? (I'll supply a daily pizza...)
Those nodes were set as external exactly because they are. These are nodes controlled by 3rd parties, with no SNMP functionality of any kind (that's available to us). Some of them allow pings and I wanted to see if I could avoid writing a script for it.