The CompTIA Network+ is supposed to validate about 9 - 12 months of Networking experience. The only reason some with your experience level would really want to consider this certification is IF:
- Your employer required it for the job.
- There is a financial advantage to you earning the Network+ certification.
- If you've don't have the background to understand IP networking. (you learned in Novell and have refused to move on to IP networking.)
It is a worthy certification to earn for the industry because it's not vendor specific per se. If you want an overview of networking, it makes the assumption that you're fairly new to networking with different technology.
In the CCENT, the Network+ level knowledge is assumed, with your experience I would say that you could assume that as well. The CCENT will be the equivalent knowledge and experience but focused and centered around vendor specific Cisco devices and concepts. If you're confident in working with Cisco routers and switches, basic configuration and concepts. I would pursue the CCENT with your experience.
The key difference that you will need here is confidence and speed. Cisco doesn't expect knowledge familiarity but knowledge mastery and they test on that mastery of basic networking concepts and familiarity with the cisco product even at the entry and associate level!