SPF, PRC, I-SPF: summary

• Receipt of a new LSP

  • does not affect SPT but has different leaves
    • PRC
  • does affect SPT
    • normal-SPF: recompute the full SPT and hence reinserts all the ISIS routes in the RIB
    • I-SPF: only recomputes the part of the SPT that is affected. Only the leaves from that part are affected.

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