.1.3.6.1.4.1.733.6.3.18.1.5.0 = 1
.1.3.6.1.4.1.733.6.3.18.1.6.0 = 0A 09 01 02
The first varbind indicates if the source is a IPv6 address. The second varbind is the IP address of the source in hexadecimal.
This is critical for trap forwarding. EMC Smart's SNMP API does not differentiate between a created trap and a forwarded trap.