Hello! My name is Jerome Tissieres, welcome to my blog.
Network engineer since 1996, I have a long experience in network planning, design, operations and troubleshooting.
I started with Internet services providers
In 1996, I built from scratch the IP network one of the first private Internet services provider of Switzerland. Then, I worked 12 years expanding and operating IP networks for different national Internet services providers. I learned a lot on the job and became a specialist in SP access technologies (dial-up, DSL/DSLAM, CaTV, FTTH). In long haul transport networks (SONET, SDH and DWDM). In various WAN technoogies like Frame-Relay, ATM, Metro-Ethernet rings, MPLS/VPN services, VPLS, Hierarchical-VPLS and finally in Segment Routing. On routing protocols, especially BGP for edge routing, but also in internal routing protocols like IS-IS, OSPF and EIGRP. Later, in VoIP and TV over IP services. And also in many others technologies specific to Internet services providers, for residential and business customers.
During that time, I was also peering manager. In charge of edge routing, capacity planning, upstreams, IXP and content providers selections, negotiations, setup and operations. And also all the tasks related to IP prefixes and AS numbers assignment, including a strong collaboration with RIPE NCC.
Then I switched to enterprise networks
After that, I spent 10 years as enterprise network engineer. First, for the IMD business school in Lausanne, where I was in charge of the entire campus network (wired and wireless access, campus core and edge routing), the security (firewalls, VPNs, IDS/IPS) and the two data-center (data-center and storage networking, load-balancing, domain-names provisioning, SSL/TLS certificates management, I also did a bit of SEO…). Then, I worked for an international company with 30 sites worldwide and an international MPLS network. And finally, 4 years as consulting engineer for Swisscom enterprise, the largest network integrator of the country and a long-time Cisco gold partner. During these 10 years, I specialized myself in enterprise networking: network design and optimization, routing and switching technologies, corporate wireless access, enterprise security and mid-size data-center networks.
And now I work in a data center
Now, since early 2019, I am working as network and security engineer for the CSCS in Lugano, Switzerland. The CSCS is part of the ETH Zurich, a national university for science and technology, founded in 1855. The CSCS develops and operates cutting-edge HPC (high-performance computing) systems as an essential service facility for Swiss and European researchers. My daily job is to operate and make evolve the in-house high-speed data-center network.
You can find my complete professional experience on my LinkedIn page.
Learning and certifications
During my career, I also kept an important place for learning and self-study. I love learning, study and practice new technologies. I also like to share this knowledge with other people. Working as a network engineer for over 20 years, I have constantly learned: on network technologies, of course, but also on network design, best practices, troubleshooting methods, configurations and fault management, monitoring, scripting, network automation. And I am still learning almost every day. This is why I have a passion for this job.
I currently hold the following IT certifications:
- CCNP Enterprise
- Cisco Certified Specialist – Enterprise Advanced Infrastructure Implementation (CCS-EAII)
- Cisco Certified Specialist – Enterprise Core (CCS-ECore)
- Cisco Certified Specialist – Enterprise Design (CCS-ED)
- CCNP Service Provider
- Cisco Certified Specialist – Service Provider Advanced Routing Implementation (CCS-SPARI)
- Cisco Certified Specialist – Service Provider VPN Services Implementation (CCS-SPVNSI)
Cisco “Retired” Certifications
- Cisco Network Programmability Design and Implementation Specialist – replaced by the Cisco DevNet certification program in 2020
- CCNP Routing & Switching – replaced by CCNP Enterprise in 2020
- CCDP – replaced by CCS-ED in 2020
- CCNA Routing & Switching – replaced by CCNA in 2020
- CCDA – retired by Cisco in 2020 with no equivalent.
- CCIP (Cisco Certified Internetwork Professional) – replaced by CCNP-SP in 2014
- CMNO #00177
- HCSA IP Network
- IPv6 Forum Gold Certified Network Engineer
- SonicWALL CSSA – Certified SonicWALL Security Administrator
- Novell Supervisor certified – Novell NetWare 3.11 (Yes, this was during dinosaur times…)
And not CCIE?
No, I am not a CCIE. I passed three times the CCIE Routing and Switching (RS) written exam (versions 4.0 and 5.0) and I failed four times at the CCIE RS lab exam in Brussels. Once at the exam version 4.0, in 2013. And three times at the version 5.0, between 2016 and 2017. After that, I stopped chasing my CCIE numbers to have time to learn other technologies.
During this great journey, I took two Narbik Kocharians / Micronics’s bootcamps and completed multiple times the practice lab workbooks of INE, iPexpert and Narbik. I also did many practice labs from Cisco expert-level training (formerly Cisco-360). This was a fantastic experience during around five years and I learned a lot!
On the personal side, I am married to a wonderful wife and have three beautiful children. My mother tongue is French and since 2010, we live in a nice place called “The Magic Valley” or Vallemaggia, in the Italian part of Switzerland. As you can see, English is not my mother tongue, this may explain some spelling mistakes on this blog, my apologies in advance.
About this blog
“It would be nice to write this in a blog, to help the next person facing the same problem!”
This is what I said, every time I meet a new challenge or problem and cannot find the corresponding documentation. Or when I found undocumented behavior on a network device or protocol. As network engineer since 1996, I said this phrase millions of times. So here it is now: I created this blog.
I talk here about Cisco, Meraki, Huawei, Mellanox, Cumulus-Linux and others network systems. The related software for network planning, design, operations, troubleshooting and automation. And also about my learning experiences in networking, software scripting and cloud.
This blog has been selected as finalist in the Most Educational category – Shares great tips, tricks, or how-to’s to help you learn something new or further your understanding on a topic – of the 2019 IT Blog Awards, hosted by Cisco:
This blog has been selected as finalist in the Best Cert Study Journey category – provides useful insights into the need-to-knows throughout a certification study journey – of the 2018 IT Blog Awards, hosted by Cisco: