Github user nickwallen commented on the issue:
https://github.com/apache/metron/pull/1201
The configuration elements for PCAP are still under Metron > Configs >
REST. Now that you've added stop/start, I think it would make sense to pull
those out into its own component/panel, like the other topologies.

I was able to spin it up, start the pcap topology, throw some pcap at it,
and see it get archived in HDFS, then search for that pcap in the UI. So ya
for that!
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