Specifies the Ipv4 address to be used as the source for
performing an OAM 'vprnTraceRoute' operation when tmnxOamTrCtlTestMode
has a value of 'vprnTraceRoute'. This parameter is required.
This object was obsoleted in release 4.0 and replaced with
InetAddress objects tmnxOamVprnTrCtlSrcAddrType and
tmnxOamVprnTrCtlSrcAddress.