Nokia Lab | LAB 4 LDP |


Hi!

Move forward to MPLS stack. The first one is LDP.  I make emphasis on LDP session process and interaction between LIB and LFIB. I recommend you use traffic dumps and debug for investigation. 
Please check my first lab for input information.

Topology example




Lab tasks and questions:
  • Basic LDP
  • prepare basic and IGP configuration (Multi-area OSPF, area type - normal, add "system" to OSPF)
  • enable LDP on P2P interfaces
  • LDP session
  • examine LDP neighbor discovery process
  • What is the destination IP address of Hello messages?
  • examine LDP session establishment
    • What address does SR-OS router use as a transport address for LDP control plane?
  • examine Label exchange
    • What label mapping does SR-OS router generate by default?
  • LIB and LFIB
    • examine LIB and LFIB
    • What is the difference between LIB and LFIB?
    • configure ECMP 2 (e.g. on R1) and examine RT, LIB and LFIB
  • Export policy and summarization
    • create two additional loopback interfaces on R1 with addresses from the same subnet (e.g. 172.16.0.0/32, 172.16.0.1/32)
    • export prefixes to LDP by policy
    • examine LFIB on R2
    • Does it contain entries with target prefixes? What about LIB?
    • What is the reason for this difference?
  • add loopback Continue reading

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