Multilayer Aware


Restore Failed Links Automatically without Collateral Damage


Restoration LIGHT

What It Does

  • Identifies the optimal fix for each IP or optical failure
  • Analyzes root cause for failures and identifies when to use optical restoration to restore IP links
  • Pre-provisions the Optical layer to restore the path along the optimal route from the IP perspective (for example, minimizing latency)
  • For complex failures, orchestrates both IP restoration and optical restoration mechanisms
  • Reverses gracefully back to normal after the failure has been fixed

Operator Benefits

  • Fully automated system
  • Up to 50% core CapEx savings at both IP/MPLS and Optical layers
  • Improved network resiliency and failure handling
  • Reduction in total network downtime for improved customer experience
  • Fast and reliable disaster recovery when multiple network elements fail simultaneously

Sedona’s multilayer Restoration app allows operators to keep much tighter safety margins for handling network failures while saving more than half of their core CapEx.

Most IP/MPLS networks today rely on the IP/MPLS layer to protect services against failures using resiliency schemes like IGP convergence and Fast Reroute. This makes sense for router-related failures. However, for optical failures, such as fiber cuts, this approach is very inefficient. It requires vast over-provisioning of resources to allow traffic impacted by an optical failure to find sufficient capacity in circumventing IP links.


Screen Shot 2016 03 08 at 3.47.52 PMAutomatic Restoration in Real Time


A much more efficient approach is to use optical restoration for such failures. This approach can save over 50% of the core ports in an IP/MPLS network.
Photonic restoration is, howerver, rather slow. It might also worsen the impact on traffic beyond the original failure if used without consideration of the IP/MPLS layer and its changing needs.
Sedona’s patent-pending multilayer solution ensures that optical restoration restores the bulk of the traffic as quickly as possible without adverse impact on traffic, and over restoration paths that are still usable by the IP/MPLS layer (for example, without excessive latency).
We take a holistic approach to restoration. It allows us to efficiently deal with failures that involve the IP/MPLS layer and cannot be dealt with using optical restoration alone. In addition, our solution manages the reversion process after the failure has been fixed to ensure no traffic is hit during this process.

Restoration Demo