All things related to multicast

["Feghali, Jose" <>]

We are trying to debug some multicasting problems here and have used the I2 router test page. One strange thing is happening and I wonder if it would be “normal” behavior:

 

Doing an mtrace on the Houston router shows only two clients on this mcast group (there are three):

 

.............> show msdp source-active group 233.73.103.142 

Group address   Source address  Peer address    Originator      Flags

233.73.103.142  138.237.xx.197  74.200.187.6    138.237.224.3   Accept

                                200.23.60.121   138.237.224.3   Reject

233.73.103.142  139.80.xxx.146  64.57.28.247    139.80.247.225  Accept

                                200.23.60.121   139.80.247.225  Reject

 

Every other router on I2 gives all three:

 

.............> show msdp source-active group 233.73.103.142 

Group address   Source address  Peer address    Originator      Flags

233.73.103.142  138.237.xx.197  64.57.28.244    138.237.224.3   Accept

                                138.18.9.253    138.237.224.3   Reject

                                206.196.177.105 138.237.224.3   Reject

233.73.103.142  138.237.xx.205  64.57.28.244    138.237.224.3   Accept

                                138.18.9.253    138.237.224.3   Reject

                                206.196.177.105 138.237.224.3   Reject

233.73.103.142  139.80.xxx.146  64.57.28.247    139.80.247.225  Accept

                                138.18.9.253    139.80.247.225  Reject

                                206.196.177.105 139.80.247.225  Reject

 

Houston is the closest I2 router to us.

 

Any ideas if this is correct behavior or, if not, where should we look?

 

Thanks,

 

José Feghali

TCU School of Music