Group-to-RP mapping distribution:(4) Directory Services

• (b) avoid using shared trees at all

  Build PIM-SM source trees across domains
  
  Put multiple A records in DNS to describe sources for the group

1.0.2.224.sources.pim.mcast.net IN CNAME dino-ss20

IN CNAME jmeylor-sun

dino-ss20 IN A 171.69.58.81

jmeylor-sun IN A 171.69.127.178

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