As always, the correct answer is, "It depends." In this particular case, it depends on the control-plane loop-prevention...
algorithms (a loop in a bridged network usually causes a total network meltdown).
If you're using traditional spanning tree algorithm (in any incarnation, including MSTP), one of the links in the ring will be blocking (almost identical to the break in the ring), so you'll lose the bandwidth of that link and have a lot of traffic flowing across suboptimal paths.
If you use PBB-Traffic Engineering, you can engineer your paths according to your needs. Unless you use true 1:1 protection backed up with stringent Quality of Service guarantees, you can use most of the bandwidth available in the ring.
Last, but definitely not least, most vendors offering ring-based Carrier Ethernet solutions use their own proprietary protocols -- for example, Cisco uses Resilient Ethernet Protocol (REP). In that case, consult the vendor.
Related Q&A from Ivan Pepelnjak
Telecom networking expert Ivan Pepelnjak breaks down the speed, bandwidth and security benefits of moving from a simple cable Internet connection to ...continue reading
Telecom networking expert Ivan Pepelnjak gives us a peek under the hood at what network technologies service providers use when designing cloud ...continue reading
Telecom networking expert Ivan Pepelnjak details the similarities and differences between Infrastructure as a Service (IaaS) and multi-tenant ...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.