What is the log ship agent for network device

How we can send logs of network device to Elasticsearch any sample configuration

Thanks

I think the easiest way I have seen is to use rsyslog from the devices and send to Filebeat or Logstash.

Thanks for the information . But i have existing data of 50 GB in syslog , How i can import that and moving forward i want the logs which is coming to syslog is also in Elasticsearch.

If it's stored in a central location, Filebeat will handle that for you.

Buy there are different folders in syslog. Any sample configuration do you have