H12-221 – HCNP-R&S-IERN (Huawei Certified Network Professional-Implementing Enterprise Routing Network)

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  Multicast RPF does not depend on unicast routing.

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  All multicast protocols adopt the RPF mechanism.

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  A router discards the received multicast packets if the RPF check fails.

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  The RPF mechanism has two functions: It prevents multicast routing loops and the forwarding of redundant multicast packets.
  
  

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  OSPF

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  RIP

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  BGP

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  Static
  
  

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  LS type

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  Link state ID

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  Advertising Router

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  LS Sequence number