I have a new application which requires multicast routing between a few subnets. This is my first time configuring Multicast routing in a production environment.
We have elected to use PIM Sparse Mode and a static RP configuration. The L3 VLAN Interfaces all live on a Cisco 4500X VSL Stack. These interfaces are already routing Unicast traffic.
I have configured IP multicast routing on the core switch using the ip multicast-routing command, and specified the static RP address using the ip pim rp-address x.x.x.x command. The RP address is a Loopback interface on the same core switch stack. I have configured PIM Sparse Mode using the ip pim sparse-mode command on each of the applicable VLAN interfaces and RP LO Interface.
After configuration, I attempted to test multicast using a pair of devices running a multicast testing tool (One Server and One Client). The client PC is not receiving any multicast traffic, except when on the same subnet as the server. The multicast group address (239.0.1.2) is also not appearing in the output of show ip igmp groups on the L3 core switch . IGMP V2 is enabled on all of the associated L3 interfaces. All of the enabled interfaces do appear in the output of the show ip pim interface command.
Did a bit of Wireshark inspection as well... I am seeing the IGMP group join messages coming from the client device, and the MC trafffic sourced from the server. It does not appear the MC stream is making it to the client subnet at all though.
I have a feeling there may be something else required to make multicast work, that I have missed. Any ideas or troubleshooting next-steps would be appreciated.
No comments:
Post a Comment