Larry,
So what you want to do is to capture the hostname of the agent which sent
the trap, correct?
Try this

CLASS Link_Up
  SELECT
    1: $TYPE = 3 ;
 FETCH
      1:   IPNAME($AGENT_ADDR)
  MAP
    msg = "Link Up SNMP Trap" ;
    hostname = $F1 ;
END

James Shanks
Level 3 Support  for Tivoli NetView for UNIX and Windows
Network Availability Management
Network Management - Development
Tivoli Software, IBM Corp

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