| 1. | Furthermore, nodes traversed by a backup path are not shown.
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| 2. | The scheme derives backup paths for every spanning path in the multicast tree.
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| 3. | Here the backup path is calculated together with the primary at provisioning time.
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| 4. | Note that complete network is not shown only primary and backup paths are shown.
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| 5. | The second approach is to have a predefined backup path computed before the failure.
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| 6. | In path protection, a backup path is used from the source to its destination to bypass the failure.
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| 7. | There are two types of path protection in Optical Mesh Networks : Dedicated Backup Path Protection and Shared Backup Path Protection
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| 8. | There are two types of path protection in Optical Mesh Networks : Dedicated Backup Path Protection and Shared Backup Path Protection
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| 9. | In one-to-one backup approach, the PLRs maintain separate backup paths for each LSP passing through a facility.
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| 10. | The backup path terminates by merging back with the primary path at a node called the " Merge Point " ( MP ).
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