In my opinion, no it's not worth it. A CCNA and the related family of Cisco certifications really trains you to be a network engineer or work in ops in general. The certificate is not very valuable for a dev or devops role in general. The material itself goes over topics that are less valuable like spanning tree protocol. And it doesn't much if anything beyond layer 4. DNS, load balancing, web protocols (HTTP, etc) are all more valuable topics to learn.
Now, the material that you're learning isn't wasteful, necessarily, but devops positions are not generally configuring routers and switches day-to-day, so I don't view this as something valuable for software engineers even in devops roles.
Some of the topics that I find valuable - general TCP/IP in general and some of the routing protocols (namely BGP is the big one) - but the other stuff just requires passing knowledge that it exists and not much else. I would pick up a networking book and go over the topics in there instead of configuring switches and vlans.