Worth Reading: Using SDN Controller with RSVP/TE
Dmytro Shypovalov published another article well worth reading: why should you use an SDN controller for RSVP-TE. It covers:
- The reasons people might still prefer RSVP-TE over SR-MPLS and the current state of RSVP-TE
- What an SDN controller might bring to the RSVP-TE world
- SR/RSVP coexistence and interworking
Have fun!
Another good reason to keep using RSVP-TE is that, unless your SR-TE policy uses only ADJ-SID, SR-traffic following a node-SID is subject to microloops as well as plane IGP-routed traffic does. So, if your network topology has a good chanche of microloops and your SR-TE policy contains Node-SID then you are subject to microloops (i.e. loops far from the Point of Local Repair that last the IGP-convergence time) that can be severe with links at say 400Ge.
And the efficacy of microloop avoidance algorithms is yet to be demonstrated. Plus, it's a very proprietary territory. Some operators don't even switch it on as the issue is not perceived properly - that's my gut feeling.