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PIM-SM over UDLR

PIM-SM over UDLR. husni@ai3.net 54 th IETF, 2002/07/16. URL. The document is on the web. http://sfc-cpu.ai3.net/~husni/pim-udlr-config/. We Did These. Experiment in AI3 C-band UDL network Generalize the experiment result network topology http://sfc-cpu.ai3.net/~husni/pim-udlr-config/.

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PIM-SM over UDLR

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  1. PIM-SM over UDLR husni@ai3.net 54th IETF, 2002/07/16

  2. URL The document is on the web. http://sfc-cpu.ai3.net/~husni/pim-udlr-config/

  3. We Did These • Experiment in AI3 C-band UDL network • Generalize the experiment result • network topology http://sfc-cpu.ai3.net/~husni/pim-udlr-config/

  4. Objective • to investigate the simplest effective configuration of PIM-SM over UDLR • where routing is asymmetric and • there is no separate MRIB http://sfc-cpu.ai3.net/~husni/pim-udlr-config/

  5. A Unicast Routing in UDLR • FEED -> RECV : UDL • RECV -> FEED : BDL

  6. Problem in Using PIM-SM • Multicast traffic flow via BDL

  7. Proposed Configuration (1/3)

  8. Proposed Configuration (2/3) • RP is the address of the UDL interface of the feed router • Receivers in receive network never to switch to SPT • Configure the networks so receive networks reach RP through the UDL • Join path uses UDL

  9. Proposed Configuration (3/3) • Item ③ • If using routing protocol • Cost of the unidirectional link interface of receive routers is not to be huge • Re-compute interface costs of routers • achieve routing config. as the previous slide • minimize the number of re-computed interfaces • A rule of thumb to configure interface costs • for a more general network topology

  10. A Rule of Thumb for Interface Costs • V is a constant

  11. Determining V • Set V such that V is the determinant of inter-network path selection • V > 2*max(rc(R,U)-rc(R,B), rc(X2,R) – rc(Y2-R), …) • Placing U and B on one subnet simplifies our life.

  12. Next Step… • I-D

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