Multicast Steady state two equal paths

[pdiazq001]

Hi Experts

………….……[Source]

                           |

(rp)—2——1—(r2)

 |  2                    |1

 |                        |

 |                        |

 |                        |

 | 1                     |2

(r3)—2——1—(r4)

 |

[Destination]

if have four routers, represented as ( ), and a source and destination [  ]. what is the steady flow for mmcast traffic if the ip addresses of the segments finish at the number indicated ( 1 or 2) for every side of the link

after commuting to the shortest path 

suppose ospf is the IGP

[Jon Marshall]

Assuming an SPT switchover and assuming you have not setup equal cost path multicast then R3 will choose the PIM neighbor with the highest IP address.

It is not possible to tell from your diagram which one that is.

Jon

[pdiazq001]

Thanks jon.

so It selects the 

………….……[Source]

                           |

(rp)—2——1—(r2)

 |  1.1.1.2           |1

 |                        |

 |                        |

 |                        |

 | 1.1.1.1            |2

(r3)—2——1—(r4)

 |        2.2.2.0

[Destination]

That is exactly my doubt. Is the neighbor or the local interface with the highest ip address.

In this case , as you told. would be the neighbor 1.1.1.2 or the same RP

regards

[Jon Marshall]

The highest IP address of a PIM neighbor from R3's perspective is R4 not the RP so I would expect the SPT to be R3 -> R4 -> R2.

Jon