[AGENT++] How to set local ip address?

[???163]

Hi,

I use Snmp::trap method to send snmptrap to a server, and the origin host
have two interfaces, lan0 and lan1.
See below:
Name           Mtu Network            Address                 Ipkts
Opkts
lan0:1        1500 10.70.11.64        10.70.11.83          30706106
0
lan1          1500 192.1.1.0          192.1.1.2              148283
276348
lan0          1500 10.70.11.64        10.70.11.84           6678945
39946345
lo0           4136 127.0.0.0          127.0.0.1             1800947
1800947
"10.70.11.83" is a float ip addr for clustering, and this ip addr is well
known to the server that acceptes trap.
But the server will receive the trap from "10.70.11.84". How can I specify
the source ip address of snmptrap?

Regards,
moore