PIM Multicast route works in one direction only

[dmitry.sherman]

Hello,

I have a network consist of 2 routers & 2 L3 switches (topology attached), servers connected to both ends with multicast traffic.

There is PIM Sparse mode configured on involved L3 interfaces along with IGMP snooping on the switches.

Testing multicast with iperf, sending from one end to another works fine but back way doesn't work.

Both are linux servers.

One router is CISCO ASR9001 and the other is Juniper MX80.

The switches are CISCO 4500-X, one of the switches has the RP role and every node has the RP pointed to that switch.

traceroute works back and forth.

Any help will be much appreciated.

[Georg Pauwen]

Hello,

--> Testing multicast with iperf, sending from one end to another works fine but back way doesn't work.

Which direction works ? Left to right, or right to left ? Can you identify where the stream stops ?