Hi atixx,
I don't really see the benefits of doing something like this, using three Splunk universal forwarders to forward syslog from one syslog device to another syslog. If you need to chain things up like this, stick with syslog all the way.
Beside this, use the usual troubleshooting to find the error, like:
All needed ports open and listening?
Any Firewalls blocking the traffic?
Network routes correct?
On SplunkUF you're using TCP as input for syslog, is that correct?
cheers, MuS
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