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DES-7200 Configuration Guide Chapter 3 MPLS Reliability Configuration
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3.2.6 Typical BFD for LDP LSP
configuration example
3.2.6.1 Networking requirements
1) Configure BFD to detect the connectivity of LDP LSP. As shown in Fig 3, there are two links
between PE1 and PE2.
2) Specifically:
3) PE1, PE2, P1 and P2 form the MPLS network.
4) There is a LDP LSP between PE1 -> P1 -> PE2 (LDP LSP1). Configure BFD for this LDP
LSP.
5) There is a static LSP between PE2 -> P2 -> PE1 (LDP LSP2). Configure BFD for this LDP
LSP, and advertise the fault detected to PE1 (backward direction link adopting LSP).
6) When LDP LSP1 fails, PE1 can quickly be notified of the fault and take the corresponding
measure: delete MPLS route.
3.2.6.2 Network topology
Fig 26 Network topology of BFD for LDP LSP