14.9 STUDY QUESTIONS

1. With the recent advancements vendors have made in improving the speed of routing convergence, is local protection still required?

2. Why doesn't NSR provide a suitable solution for tail-end protection?

3. How are context labels similar to VPN labels?

4. What additional information must be propagated along with the pseudowire label between the primary and the protector to create the correct forwarding state on the protector?

5. Why is it important that the bypass LSP not be used for any routing function in the egress protection virtual circuit solution?

1. SONET and SDH standards state a maximum switching time of 50 ms for certain protection schemes. Note that this time is counted from when the switch is initiated, so does not include the time taken to detect the failure.