Hi, I believe the value of the RMON-II MIB object alMatrixTopNSourceAddress (for an IP protocol) should be ip address length followed by the ip address. for eg. ***** SNMP QUERY STARTED ***** 1: alMatrixTopNSourceAddress.32.1 (octet string) 04.AC.13.C5.E4 (hex) 2: alMatrixTopNSourceAddress.32.2 (octet string) 04.AC.13.C5.E4 (hex) ***** SNMP QUERY FINISHED ***** Is this correct? Thanks, Chintan __________________________________ Do you Yahoo!? Yahoo! Small Business $15K Web Design Giveaway http://promotions.yahoo.com/design_giveaway/