Optionally references a named loopback address used as the sender in the measurement packets. If the field is left empty, the router automatically selects an address that matches the sending interface.
- SNMP ID:
 - 2.110.4.1.3
 - Console path:
 - Setup > Firewall > Dynamic-Path-Selection > ICMP-Measurement-Profiles
 - Possible values:
 Max. 16 characters from [A-Z][0-9]@{|}~!$%&'()+-,/:;<=>?[\]^_.