Syslog and linux

I'm currently using linux (as network device) and manually generated syslog messages for testing SolarWinds syslog messages.

I'm receiving syslog messages normally (there is some text in message field) but there is no information in sysname, community, tag, vendor etc...I'm aware that SolarWinds uses RFC 3164 format for syslog messages, but I don't know how to add those few fields in the same syslog message.

How SolarWinds does pick up those from the syslog message? How to add vendor, community etc to there..

Thanks..